/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf -tc ../../../trunk/examples/toolchains/AutomizerBplInline.xml -i ../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-29289db [2021-06-05 15:02:36,099 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-06-05 15:02:36,100 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-06-05 15:02:36,117 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... 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[2021-06-05 15:02:36,137 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-06-05 15:02:36,137 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-06-05 15:02:36,138 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-06-05 15:02:36,138 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-NoLbe-Separate.epf [2021-06-05 15:02:36,155 INFO L113 SettingsManager]: Loading preferences was successful [2021-06-05 15:02:36,156 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-06-05 15:02:36,156 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-06-05 15:02:36,156 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-06-05 15:02:36,157 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-06-05 15:02:36,157 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-06-05 15:02:36,157 INFO L138 SettingsManager]: * Use SBE=true [2021-06-05 15:02:36,157 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-06-05 15:02:36,157 INFO L138 SettingsManager]: * sizeof long=4 [2021-06-05 15:02:36,157 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * sizeof long double=12 [2021-06-05 15:02:36,158 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-06-05 15:02:36,159 INFO L138 SettingsManager]: * Use constant arrays=true [2021-06-05 15:02:36,159 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-06-05 15:02:36,159 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-06-05 15:02:36,159 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-06-05 15:02:36,159 INFO L138 SettingsManager]: * To the following directory=./dump/ [2021-06-05 15:02:36,159 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-06-05 15:02:36,159 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:02:36,160 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-06-05 15:02:36,160 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-06-05 15:02:36,160 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-06-05 15:02:36,160 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-06-05 15:02:36,160 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-06-05 15:02:36,160 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=OFF [2021-06-05 15:02:36,160 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-06-05 15:02:36,161 INFO L138 SettingsManager]: * Check the insufficient thread errors last=true [2021-06-05 15:02:36,161 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2021-06-05 15:02:36,408 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-06-05 15:02:36,422 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-06-05 15:02:36,423 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-06-05 15:02:36,424 INFO L271 PluginConnector]: Initializing Boogie PL CUP Parser... [2021-06-05 15:02:36,425 INFO L275 PluginConnector]: Boogie PL CUP Parser initialized [2021-06-05 15:02:36,425 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl [2021-06-05 15:02:36,425 INFO L110 BoogieParser]: Parsing: '/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/concurrent/bpl/weaver-benchmarks/generated/parallel/parallel-sum-1.wvr.bpl' [2021-06-05 15:02:36,477 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-06-05 15:02:36,478 INFO L131 ToolchainWalker]: Walking toolchain with 4 elements. [2021-06-05 15:02:36,479 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-06-05 15:02:36,479 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-06-05 15:02:36,479 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-06-05 15:02:36,488 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,493 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,498 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-06-05 15:02:36,500 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-06-05 15:02:36,500 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-06-05 15:02:36,500 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-06-05 15:02:36,505 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,505 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,507 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,507 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,513 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,516 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,516 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... [2021-06-05 15:02:36,520 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-06-05 15:02:36,521 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-06-05 15:02:36,521 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-06-05 15:02:36,522 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-06-05 15:02:36,523 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-06-05 15:02:36,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread1 given in one single declaration [2021-06-05 15:02:36,587 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-06-05 15:02:36,587 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-06-05 15:02:36,587 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread2 given in one single declaration [2021-06-05 15:02:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-06-05 15:02:36,588 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-06-05 15:02:36,588 INFO L124 BoogieDeclarations]: Specification and implementation of procedure ULTIMATE.start given in one single declaration [2021-06-05 15:02:36,588 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-06-05 15:02:36,588 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-06-05 15:02:36,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread3 given in one single declaration [2021-06-05 15:02:36,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2021-06-05 15:02:36,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2021-06-05 15:02:36,589 INFO L124 BoogieDeclarations]: Specification and implementation of procedure thread4 given in one single declaration [2021-06-05 15:02:36,589 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2021-06-05 15:02:36,589 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2021-06-05 15:02:36,590 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-06-05 15:02:36,759 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-06-05 15:02:36,759 INFO L299 CfgBuilder]: Removed 4 assume(true) statements. [2021-06-05 15:02:36,760 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread1EXIT is neither atomic block end nor error location. [2021-06-05 15:02:36,760 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread2EXIT is neither atomic block end nor error location. [2021-06-05 15:02:36,760 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread3EXIT is neither atomic block end nor error location. [2021-06-05 15:02:36,760 WARN L327 CfgBuilder]: Unexpected successor node of atomic block begin: thread4EXIT is neither atomic block end nor error location. [2021-06-05 15:02:36,761 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:02:36 BoogieIcfgContainer [2021-06-05 15:02:36,761 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-06-05 15:02:36,777 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-06-05 15:02:36,777 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-06-05 15:02:36,780 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-06-05 15:02:36,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.boogie.parser AST 05.06 03:02:36" (1/2) ... [2021-06-05 15:02:36,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@214aaaf6 and model type parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.06 03:02:36, skipping insertion in model container [2021-06-05 15:02:36,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.06 03:02:36" (2/2) ... [2021-06-05 15:02:36,781 INFO L111 eAbstractionObserver]: Analyzing ICFG parallel-sum-1.wvr.bpl [2021-06-05 15:02:36,785 WARN L148 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-06-05 15:02:36,785 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-06-05 15:02:36,785 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-06-05 15:02:36,786 INFO L510 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-06-05 15:02:36,839 INFO L149 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2021-06-05 15:02:36,854 INFO L255 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2021-06-05 15:02:36,873 INFO L378 AbstractCegarLoop]: Interprodecural is true [2021-06-05 15:02:36,874 INFO L379 AbstractCegarLoop]: Hoare is false [2021-06-05 15:02:36,874 INFO L380 AbstractCegarLoop]: Compute interpolants for FPandBP [2021-06-05 15:02:36,874 INFO L381 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2021-06-05 15:02:36,874 INFO L382 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2021-06-05 15:02:36,874 INFO L383 AbstractCegarLoop]: Difference is false [2021-06-05 15:02:36,874 INFO L384 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2021-06-05 15:02:36,874 INFO L388 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2021-06-05 15:02:36,887 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 38 places, 29 transitions, 90 flow [2021-06-05 15:02:36,913 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,916 INFO L276 IsEmpty]: Start isEmpty. Operand has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:36,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-06-05 15:02:36,926 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:36,927 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:36,927 INFO L430 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:36,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:36,933 INFO L82 PathProgramCache]: Analyzing trace with hash -2029517161, now seen corresponding path program 1 times [2021-06-05 15:02:36,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:36,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778650769] [2021-06-05 15:02:36,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:36,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:37,053 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,054 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:37,054 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778650769] [2021-06-05 15:02:37,055 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1778650769] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:37,055 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-06-05 15:02:37,055 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-06-05 15:02:37,056 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329218731] [2021-06-05 15:02:37,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 3 states [2021-06-05 15:02:37,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:37,070 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-06-05 15:02:37,070 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:02:37,072 INFO L87 Difference]: Start difference. First operand has 166 states, 164 states have (on average 3.7378048780487805) internal successors, (613), 165 states have internal predecessors, (613), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:37,120 INFO L93 Difference]: Finished difference Result 324 states and 1218 transitions. [2021-06-05 15:02:37,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:02:37,121 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-06-05 15:02:37,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:37,136 INFO L225 Difference]: With dead ends: 324 [2021-06-05 15:02:37,136 INFO L226 Difference]: Without dead ends: 319 [2021-06-05 15:02:37,137 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 11.4ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-06-05 15:02:37,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 319 states. [2021-06-05 15:02:37,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 319 to 204. [2021-06-05 15:02:37,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 3.7339901477832513) internal successors, (758), 203 states have internal predecessors, (758), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 758 transitions. [2021-06-05 15:02:37,195 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 758 transitions. Word has length 15 [2021-06-05 15:02:37,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:37,196 INFO L482 AbstractCegarLoop]: Abstraction has 204 states and 758 transitions. [2021-06-05 15:02:37,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 2 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,197 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 758 transitions. [2021-06-05 15:02:37,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:02:37,202 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:37,202 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:37,202 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-06-05 15:02:37,202 INFO L430 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:37,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:37,205 INFO L82 PathProgramCache]: Analyzing trace with hash -432769320, now seen corresponding path program 1 times [2021-06-05 15:02:37,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:37,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [264713015] [2021-06-05 15:02:37,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:37,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:37,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [264713015] [2021-06-05 15:02:37,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [264713015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926988966] [2021-06-05 15:02:37,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:37,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:37,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:37,316 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:37,416 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926988966] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:37,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:02:37,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-06-05 15:02:37,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973887767] [2021-06-05 15:02:37,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:02:37,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:37,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:02:37,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:02:37,418 INFO L87 Difference]: Start difference. First operand 204 states and 758 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:37,440 INFO L93 Difference]: Finished difference Result 500 states and 1907 transitions. [2021-06-05 15:02:37,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:02:37,441 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 15:02:37,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:37,444 INFO L225 Difference]: With dead ends: 500 [2021-06-05 15:02:37,444 INFO L226 Difference]: Without dead ends: 453 [2021-06-05 15:02:37,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 16.4ms TimeCoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:02:37,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 453 states. [2021-06-05 15:02:37,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 453 to 434. [2021-06-05 15:02:37,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 434 states, 433 states have (on average 3.8960739030023093) internal successors, (1687), 433 states have internal predecessors, (1687), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 434 states to 434 states and 1687 transitions. [2021-06-05 15:02:37,459 INFO L78 Accepts]: Start accepts. Automaton has 434 states and 1687 transitions. Word has length 17 [2021-06-05 15:02:37,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:37,459 INFO L482 AbstractCegarLoop]: Abstraction has 434 states and 1687 transitions. [2021-06-05 15:02:37,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,460 INFO L276 IsEmpty]: Start isEmpty. Operand 434 states and 1687 transitions. [2021-06-05 15:02:37,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-06-05 15:02:37,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:37,461 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:37,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1 [2021-06-05 15:02:37,673 INFO L430 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash 243471090, now seen corresponding path program 1 times [2021-06-05 15:02:37,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:37,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722790983] [2021-06-05 15:02:37,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:37,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:37,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722790983] [2021-06-05 15:02:37,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722790983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:37,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930415414] [2021-06-05 15:02:37,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:37,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:37,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 4 conjunts are in the unsatisfiable core [2021-06-05 15:02:37,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:37,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:37,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930415414] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:37,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:02:37,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2021-06-05 15:02:37,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484340256] [2021-06-05 15:02:37,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 4 states [2021-06-05 15:02:37,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:37,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2021-06-05 15:02:37,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:02:37,828 INFO L87 Difference]: Start difference. First operand 434 states and 1687 transitions. Second operand has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,858 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:37,858 INFO L93 Difference]: Finished difference Result 734 states and 2844 transitions. [2021-06-05 15:02:37,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2021-06-05 15:02:37,859 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-06-05 15:02:37,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:37,862 INFO L225 Difference]: With dead ends: 734 [2021-06-05 15:02:37,863 INFO L226 Difference]: Without dead ends: 715 [2021-06-05 15:02:37,863 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 15.6ms TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2021-06-05 15:02:37,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 715 states. [2021-06-05 15:02:37,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 715 to 681. [2021-06-05 15:02:37,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 681 states, 680 states have (on average 3.9426470588235296) internal successors, (2681), 680 states have internal predecessors, (2681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 681 states to 681 states and 2681 transitions. [2021-06-05 15:02:37,882 INFO L78 Accepts]: Start accepts. Automaton has 681 states and 2681 transitions. Word has length 17 [2021-06-05 15:02:37,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:37,882 INFO L482 AbstractCegarLoop]: Abstraction has 681 states and 2681 transitions. [2021-06-05 15:02:37,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 4 states, 4 states have (on average 4.25) internal successors, (17), 3 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:37,883 INFO L276 IsEmpty]: Start isEmpty. Operand 681 states and 2681 transitions. [2021-06-05 15:02:37,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:37,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:37,885 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:38,103 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,103 INFO L430 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:38,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:38,104 INFO L82 PathProgramCache]: Analyzing trace with hash -322877901, now seen corresponding path program 1 times [2021-06-05 15:02:38,104 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:38,104 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549616067] [2021-06-05 15:02:38,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:38,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:38,221 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:38,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549616067] [2021-06-05 15:02:38,222 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549616067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,222 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408966353] [2021-06-05 15:02:38,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:38,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:38,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:38,345 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 15:02:38,346 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:38,349 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:38,349 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:38,350 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 15:02:38,377 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:38,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408966353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:38,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:38,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:38,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [946665733] [2021-06-05 15:02:38,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:38,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:38,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:38,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:38,380 INFO L87 Difference]: Start difference. First operand 681 states and 2681 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:38,724 INFO L93 Difference]: Finished difference Result 1344 states and 5255 transitions. [2021-06-05 15:02:38,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:38,725 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:38,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:38,731 INFO L225 Difference]: With dead ends: 1344 [2021-06-05 15:02:38,731 INFO L226 Difference]: Without dead ends: 1314 [2021-06-05 15:02:38,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 214.6ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:38,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1314 states. [2021-06-05 15:02:38,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1314 to 727. [2021-06-05 15:02:38,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 727 states, 726 states have (on average 3.9958677685950414) internal successors, (2901), 726 states have internal predecessors, (2901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 727 states to 727 states and 2901 transitions. [2021-06-05 15:02:38,750 INFO L78 Accepts]: Start accepts. Automaton has 727 states and 2901 transitions. Word has length 19 [2021-06-05 15:02:38,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:38,750 INFO L482 AbstractCegarLoop]: Abstraction has 727 states and 2901 transitions. [2021-06-05 15:02:38,751 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:38,751 INFO L276 IsEmpty]: Start isEmpty. Operand 727 states and 2901 transitions. [2021-06-05 15:02:38,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:38,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:38,752 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:38,968 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:38,969 INFO L430 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:38,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:38,969 INFO L82 PathProgramCache]: Analyzing trace with hash 262456051, now seen corresponding path program 2 times [2021-06-05 15:02:38,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:38,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1646309826] [2021-06-05 15:02:38,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:38,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:39,037 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,037 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:39,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1646309826] [2021-06-05 15:02:39,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1646309826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [221553798] [2021-06-05 15:02:39,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:39,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:39,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:39,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:02:39,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:39,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:39,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:39,137 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:39,145 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:39,146 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:39,146 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 15:02:39,233 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,234 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [221553798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,234 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:39,234 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:39,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829000660] [2021-06-05 15:02:39,237 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:39,237 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:39,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:39,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:39,243 INFO L87 Difference]: Start difference. First operand 727 states and 2901 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:39,356 INFO L93 Difference]: Finished difference Result 918 states and 3625 transitions. [2021-06-05 15:02:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:39,356 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:39,361 INFO L225 Difference]: With dead ends: 918 [2021-06-05 15:02:39,361 INFO L226 Difference]: Without dead ends: 896 [2021-06-05 15:02:39,361 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 94.9ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:39,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 896 states. [2021-06-05 15:02:39,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 896 to 739. [2021-06-05 15:02:39,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.9959349593495936) internal successors, (2949), 738 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2949 transitions. [2021-06-05 15:02:39,380 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2949 transitions. Word has length 19 [2021-06-05 15:02:39,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:39,381 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2949 transitions. [2021-06-05 15:02:39,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,381 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2949 transitions. [2021-06-05 15:02:39,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:39,382 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:39,383 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:39,596 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:39,597 INFO L430 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:39,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:39,597 INFO L82 PathProgramCache]: Analyzing trace with hash 1876022785, now seen corresponding path program 3 times [2021-06-05 15:02:39,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:39,597 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [720406193] [2021-06-05 15:02:39,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:39,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:39,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,668 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:39,668 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [720406193] [2021-06-05 15:02:39,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [720406193] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464940870] [2021-06-05 15:02:39,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:39,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:39,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:39,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:02:39,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:39,762 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:39,762 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:39,763 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:39,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:39,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:39,770 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 15:02:39,849 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:39,849 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464940870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:39,849 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:39,849 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:39,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670548340] [2021-06-05 15:02:39,850 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:39,850 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:39,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:39,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:39,850 INFO L87 Difference]: Start difference. First operand 739 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:39,959 INFO L93 Difference]: Finished difference Result 914 states and 3616 transitions. [2021-06-05 15:02:39,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:39,960 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:39,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:39,965 INFO L225 Difference]: With dead ends: 914 [2021-06-05 15:02:39,965 INFO L226 Difference]: Without dead ends: 899 [2021-06-05 15:02:39,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 119.3ms TimeCoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:39,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 899 states. [2021-06-05 15:02:39,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 899 to 739. [2021-06-05 15:02:39,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 739 states, 738 states have (on average 3.9959349593495936) internal successors, (2949), 738 states have internal predecessors, (2949), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 739 states to 739 states and 2949 transitions. [2021-06-05 15:02:39,983 INFO L78 Accepts]: Start accepts. Automaton has 739 states and 2949 transitions. Word has length 19 [2021-06-05 15:02:39,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:39,984 INFO L482 AbstractCegarLoop]: Abstraction has 739 states and 2949 transitions. [2021-06-05 15:02:39,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:39,984 INFO L276 IsEmpty]: Start isEmpty. Operand 739 states and 2949 transitions. [2021-06-05 15:02:39,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:39,985 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:39,986 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:40,204 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2021-06-05 15:02:40,204 INFO L430 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:40,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:40,204 INFO L82 PathProgramCache]: Analyzing trace with hash 26619477, now seen corresponding path program 4 times [2021-06-05 15:02:40,204 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:40,205 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976663419] [2021-06-05 15:02:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:40,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:40,254 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:40,254 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:40,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976663419] [2021-06-05 15:02:40,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976663419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:40,254 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1943343847] [2021-06-05 15:02:40,254 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:02:40,288 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:40,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:40,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:40,290 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:40,342 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:40,343 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:40,346 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:40,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:40,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 15:02:40,370 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:40,370 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1943343847] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:40,370 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:40,370 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:40,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715775746] [2021-06-05 15:02:40,370 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:40,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:40,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:40,371 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:40,371 INFO L87 Difference]: Start difference. First operand 739 states and 2949 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:40,574 INFO L93 Difference]: Finished difference Result 1178 states and 4636 transitions. [2021-06-05 15:02:40,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:02:40,575 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:40,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:40,580 INFO L225 Difference]: With dead ends: 1178 [2021-06-05 15:02:40,580 INFO L226 Difference]: Without dead ends: 1169 [2021-06-05 15:02:40,581 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 134.3ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:40,586 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1169 states. [2021-06-05 15:02:40,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1169 to 799. [2021-06-05 15:02:40,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 799 states, 798 states have (on average 4.006265664160401) internal successors, (3197), 798 states have internal predecessors, (3197), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 799 states to 799 states and 3197 transitions. [2021-06-05 15:02:40,603 INFO L78 Accepts]: Start accepts. Automaton has 799 states and 3197 transitions. Word has length 19 [2021-06-05 15:02:40,603 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:40,603 INFO L482 AbstractCegarLoop]: Abstraction has 799 states and 3197 transitions. [2021-06-05 15:02:40,603 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:40,603 INFO L276 IsEmpty]: Start isEmpty. Operand 799 states and 3197 transitions. [2021-06-05 15:02:40,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:40,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:40,605 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:40,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:40,823 INFO L430 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:40,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:40,823 INFO L82 PathProgramCache]: Analyzing trace with hash 108018533, now seen corresponding path program 5 times [2021-06-05 15:02:40,823 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:40,823 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1115283901] [2021-06-05 15:02:40,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:40,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:40,869 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:40,869 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:40,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1115283901] [2021-06-05 15:02:40,869 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1115283901] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:40,869 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244496381] [2021-06-05 15:02:40,869 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:40,898 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:02:40,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:40,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 23 conjunts are in the unsatisfiable core [2021-06-05 15:02:40,900 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:40,943 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:40,943 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:40,944 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:40,951 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:40,961 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:40,961 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:36 [2021-06-05 15:02:41,046 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,046 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1244496381] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,046 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:41,046 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:41,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737425024] [2021-06-05 15:02:41,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:41,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:41,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:41,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:41,048 INFO L87 Difference]: Start difference. First operand 799 states and 3197 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:41,477 INFO L93 Difference]: Finished difference Result 1115 states and 4405 transitions. [2021-06-05 15:02:41,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:02:41,478 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:41,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:41,483 INFO L225 Difference]: With dead ends: 1115 [2021-06-05 15:02:41,483 INFO L226 Difference]: Without dead ends: 1106 [2021-06-05 15:02:41,483 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 351.1ms TimeCoverageRelationStatistics Valid=109, Invalid=397, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:02:41,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1106 states. [2021-06-05 15:02:41,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1106 to 803. [2021-06-05 15:02:41,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 803 states, 802 states have (on average 4.006234413965087) internal successors, (3213), 802 states have internal predecessors, (3213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 803 states to 803 states and 3213 transitions. [2021-06-05 15:02:41,502 INFO L78 Accepts]: Start accepts. Automaton has 803 states and 3213 transitions. Word has length 19 [2021-06-05 15:02:41,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:41,502 INFO L482 AbstractCegarLoop]: Abstraction has 803 states and 3213 transitions. [2021-06-05 15:02:41,502 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:41,502 INFO L276 IsEmpty]: Start isEmpty. Operand 803 states and 3213 transitions. [2021-06-05 15:02:41,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:41,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:41,504 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:41,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:41,717 INFO L430 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:41,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:41,717 INFO L82 PathProgramCache]: Analyzing trace with hash 1721585267, now seen corresponding path program 6 times [2021-06-05 15:02:41,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:41,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142051584] [2021-06-05 15:02:41,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:41,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:41,781 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:41,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142051584] [2021-06-05 15:02:41,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2142051584] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418195572] [2021-06-05 15:02:41,781 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:41,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:41,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:41,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:41,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:41,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:41,861 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:41,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:41,870 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:41,871 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:41,872 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 15:02:41,917 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:41,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [418195572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:41,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:41,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:02:41,918 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852161618] [2021-06-05 15:02:41,919 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:41,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:41,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:41,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:41,920 INFO L87 Difference]: Start difference. First operand 803 states and 3213 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:42,016 INFO L93 Difference]: Finished difference Result 1049 states and 4169 transitions. [2021-06-05 15:02:42,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:02:42,016 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:42,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:42,021 INFO L225 Difference]: With dead ends: 1049 [2021-06-05 15:02:42,021 INFO L226 Difference]: Without dead ends: 1038 [2021-06-05 15:02:42,021 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 98.8ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:02:42,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1038 states. [2021-06-05 15:02:42,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1038 to 809. [2021-06-05 15:02:42,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 809 states, 808 states have (on average 4.006188118811881) internal successors, (3237), 808 states have internal predecessors, (3237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 809 states to 809 states and 3237 transitions. [2021-06-05 15:02:42,039 INFO L78 Accepts]: Start accepts. Automaton has 809 states and 3237 transitions. Word has length 19 [2021-06-05 15:02:42,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:42,039 INFO L482 AbstractCegarLoop]: Abstraction has 809 states and 3237 transitions. [2021-06-05 15:02:42,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,039 INFO L276 IsEmpty]: Start isEmpty. Operand 809 states and 3237 transitions. [2021-06-05 15:02:42,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:42,041 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:42,041 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:42,248 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2021-06-05 15:02:42,249 INFO L430 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:42,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:42,249 INFO L82 PathProgramCache]: Analyzing trace with hash -479624143, now seen corresponding path program 1 times [2021-06-05 15:02:42,249 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:42,249 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442439980] [2021-06-05 15:02:42,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:42,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,307 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:42,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442439980] [2021-06-05 15:02:42,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [442439980] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103407395] [2021-06-05 15:02:42,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:42,383 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:42,383 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 15:02:42,384 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:42,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:42,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:42,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:14 [2021-06-05 15:02:42,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2103407395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,419 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:42,419 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:02:42,420 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1513511253] [2021-06-05 15:02:42,420 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:42,420 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:42,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:42,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:42,420 INFO L87 Difference]: Start difference. First operand 809 states and 3237 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:42,532 INFO L93 Difference]: Finished difference Result 1211 states and 4804 transitions. [2021-06-05 15:02:42,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:42,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:42,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:42,537 INFO L225 Difference]: With dead ends: 1211 [2021-06-05 15:02:42,538 INFO L226 Difference]: Without dead ends: 1194 [2021-06-05 15:02:42,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 79.7ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:42,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1194 states. [2021-06-05 15:02:42,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1194 to 829. [2021-06-05 15:02:42,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 829 states, 828 states have (on average 4.01207729468599) internal successors, (3322), 828 states have internal predecessors, (3322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 829 states to 829 states and 3322 transitions. [2021-06-05 15:02:42,555 INFO L78 Accepts]: Start accepts. Automaton has 829 states and 3322 transitions. Word has length 19 [2021-06-05 15:02:42,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:42,555 INFO L482 AbstractCegarLoop]: Abstraction has 829 states and 3322 transitions. [2021-06-05 15:02:42,555 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:42,556 INFO L276 IsEmpty]: Start isEmpty. Operand 829 states and 3322 transitions. [2021-06-05 15:02:42,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:42,557 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:42,557 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:42,772 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,773 INFO L430 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:42,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:42,773 INFO L82 PathProgramCache]: Analyzing trace with hash 33902709, now seen corresponding path program 2 times [2021-06-05 15:02:42,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:42,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671281055] [2021-06-05 15:02:42,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:42,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:42,831 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,832 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671281055] [2021-06-05 15:02:42,832 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671281055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,832 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [827301690] [2021-06-05 15:02:42,832 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:42,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:42,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:42,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 13 conjunts are in the unsatisfiable core [2021-06-05 15:02:42,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:42,892 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:42,892 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:42,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:42,901 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:42,903 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:42,903 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 15:02:42,947 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:42,947 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [827301690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:42,947 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:42,947 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2021-06-05 15:02:42,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690997600] [2021-06-05 15:02:42,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:02:42,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:42,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:02:42,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:42,948 INFO L87 Difference]: Start difference. First operand 829 states and 3322 transitions. Second operand has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:43,028 INFO L93 Difference]: Finished difference Result 1110 states and 4398 transitions. [2021-06-05 15:02:43,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:43,029 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:43,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:43,033 INFO L225 Difference]: With dead ends: 1110 [2021-06-05 15:02:43,033 INFO L226 Difference]: Without dead ends: 1086 [2021-06-05 15:02:43,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 69.4ms TimeCoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:02:43,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1086 states. [2021-06-05 15:02:43,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1086 to 846. [2021-06-05 15:02:43,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 4.011834319526627) internal successors, (3390), 845 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3390 transitions. [2021-06-05 15:02:43,050 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3390 transitions. Word has length 19 [2021-06-05 15:02:43,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:43,050 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 3390 transitions. [2021-06-05 15:02:43,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 3.111111111111111) internal successors, (28), 8 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,051 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3390 transitions. [2021-06-05 15:02:43,052 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:43,052 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:43,052 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:43,268 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,11 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,269 INFO L430 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:43,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:43,269 INFO L82 PathProgramCache]: Analyzing trace with hash 1109613865, now seen corresponding path program 3 times [2021-06-05 15:02:43,269 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:43,269 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349326851] [2021-06-05 15:02:43,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:43,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:43,321 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,321 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:43,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349326851] [2021-06-05 15:02:43,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1349326851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,321 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1143736874] [2021-06-05 15:02:43,321 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,358 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:43,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:43,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:43,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:43,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:43,397 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:43,398 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:43,402 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:43,402 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:43,402 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 15:02:43,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1143736874] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:43,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:02:43,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993491237] [2021-06-05 15:02:43,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:43,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:43,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:43,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:43,445 INFO L87 Difference]: Start difference. First operand 846 states and 3390 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:43,532 INFO L93 Difference]: Finished difference Result 1105 states and 4384 transitions. [2021-06-05 15:02:43,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:43,532 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:43,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:43,537 INFO L225 Difference]: With dead ends: 1105 [2021-06-05 15:02:43,537 INFO L226 Difference]: Without dead ends: 1088 [2021-06-05 15:02:43,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 76.9ms TimeCoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:43,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1088 states. [2021-06-05 15:02:43,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1088 to 846. [2021-06-05 15:02:43,552 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 4.011834319526627) internal successors, (3390), 845 states have internal predecessors, (3390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 3390 transitions. [2021-06-05 15:02:43,554 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 3390 transitions. Word has length 19 [2021-06-05 15:02:43,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:43,554 INFO L482 AbstractCegarLoop]: Abstraction has 846 states and 3390 transitions. [2021-06-05 15:02:43,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:43,554 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 3390 transitions. [2021-06-05 15:02:43,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:43,556 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:43,556 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:43,761 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-06-05 15:02:43,761 INFO L430 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:43,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:43,762 INFO L82 PathProgramCache]: Analyzing trace with hash -70116645, now seen corresponding path program 4 times [2021-06-05 15:02:43,762 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:43,762 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849491572] [2021-06-05 15:02:43,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:43,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:43,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,803 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849491572] [2021-06-05 15:02:43,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [849491572] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,803 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213446336] [2021-06-05 15:02:43,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:43,835 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:43,835 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:43,835 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:43,836 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:43,885 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 15:02:43,886 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:43,888 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:43,889 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:43,889 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 15:02:43,913 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:43,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [213446336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:43,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:43,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:43,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [962852995] [2021-06-05 15:02:43,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:43,914 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:43,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:43,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:43,914 INFO L87 Difference]: Start difference. First operand 846 states and 3390 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:44,116 INFO L93 Difference]: Finished difference Result 1294 states and 5123 transitions. [2021-06-05 15:02:44,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:02:44,117 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:44,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:44,122 INFO L225 Difference]: With dead ends: 1294 [2021-06-05 15:02:44,123 INFO L226 Difference]: Without dead ends: 1285 [2021-06-05 15:02:44,123 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 130.5ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:44,124 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1285 states. [2021-06-05 15:02:44,137 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1285 to 872. [2021-06-05 15:02:44,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 872 states, 871 states have (on average 4.013777267508611) internal successors, (3496), 871 states have internal predecessors, (3496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 872 states to 872 states and 3496 transitions. [2021-06-05 15:02:44,141 INFO L78 Accepts]: Start accepts. Automaton has 872 states and 3496 transitions. Word has length 19 [2021-06-05 15:02:44,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:44,141 INFO L482 AbstractCegarLoop]: Abstraction has 872 states and 3496 transitions. [2021-06-05 15:02:44,142 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,142 INFO L276 IsEmpty]: Start isEmpty. Operand 872 states and 3496 transitions. [2021-06-05 15:02:44,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:44,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:44,143 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:44,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-06-05 15:02:44,357 INFO L430 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:44,357 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:44,357 INFO L82 PathProgramCache]: Analyzing trace with hash 517628677, now seen corresponding path program 5 times [2021-06-05 15:02:44,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:44,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553196745] [2021-06-05 15:02:44,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:44,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,410 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553196745] [2021-06-05 15:02:44,410 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [553196745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,410 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [465267200] [2021-06-05 15:02:44,410 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:44,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:02:44,439 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:44,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:44,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:44,473 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:02:44,474 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:44,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:44,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:44,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 15:02:44,510 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,510 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [465267200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,510 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:44,510 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:44,510 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565291632] [2021-06-05 15:02:44,511 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:44,511 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:44,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:44,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:44,511 INFO L87 Difference]: Start difference. First operand 872 states and 3496 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:44,703 INFO L93 Difference]: Finished difference Result 1254 states and 4985 transitions. [2021-06-05 15:02:44,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:02:44,704 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:44,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:44,708 INFO L225 Difference]: With dead ends: 1254 [2021-06-05 15:02:44,708 INFO L226 Difference]: Without dead ends: 1245 [2021-06-05 15:02:44,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 164.2ms TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:44,710 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1245 states. [2021-06-05 15:02:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1245 to 878. [2021-06-05 15:02:44,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 878 states, 877 states have (on average 4.013683010262258) internal successors, (3520), 877 states have internal predecessors, (3520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 878 states to 878 states and 3520 transitions. [2021-06-05 15:02:44,726 INFO L78 Accepts]: Start accepts. Automaton has 878 states and 3520 transitions. Word has length 19 [2021-06-05 15:02:44,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:44,726 INFO L482 AbstractCegarLoop]: Abstraction has 878 states and 3520 transitions. [2021-06-05 15:02:44,726 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:44,726 INFO L276 IsEmpty]: Start isEmpty. Operand 878 states and 3520 transitions. [2021-06-05 15:02:44,728 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:44,728 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:44,728 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:44,945 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2021-06-05 15:02:44,945 INFO L430 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:44,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:44,945 INFO L82 PathProgramCache]: Analyzing trace with hash 1593339833, now seen corresponding path program 6 times [2021-06-05 15:02:44,945 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:44,945 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004056762] [2021-06-05 15:02:44,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:44,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:44,987 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:44,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004056762] [2021-06-05 15:02:44,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004056762] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:44,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515375536] [2021-06-05 15:02:44,988 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,015 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:45,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:45,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:45,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:45,050 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:45,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:45,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:45,055 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:45,055 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:45,056 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 15:02:45,096 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515375536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:45,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:02:45,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048184144] [2021-06-05 15:02:45,097 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:45,097 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:45,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:45,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:45,097 INFO L87 Difference]: Start difference. First operand 878 states and 3520 transitions. Second operand has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:45,218 INFO L93 Difference]: Finished difference Result 1123 states and 4469 transitions. [2021-06-05 15:02:45,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:02:45,218 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:45,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:45,221 INFO L225 Difference]: With dead ends: 1123 [2021-06-05 15:02:45,221 INFO L226 Difference]: Without dead ends: 1112 [2021-06-05 15:02:45,224 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 89.5ms TimeCoverageRelationStatistics Valid=50, Invalid=132, Unknown=0, NotChecked=0, Total=182 [2021-06-05 15:02:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1112 states. [2021-06-05 15:02:45,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1112 to 882. [2021-06-05 15:02:45,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 882 states, 881 states have (on average 4.013620885357549) internal successors, (3536), 881 states have internal predecessors, (3536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 882 states to 882 states and 3536 transitions. [2021-06-05 15:02:45,261 INFO L78 Accepts]: Start accepts. Automaton has 882 states and 3536 transitions. Word has length 19 [2021-06-05 15:02:45,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:45,261 INFO L482 AbstractCegarLoop]: Abstraction has 882 states and 3536 transitions. [2021-06-05 15:02:45,261 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.727272727272727) internal successors, (30), 10 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,261 INFO L276 IsEmpty]: Start isEmpty. Operand 882 states and 3536 transitions. [2021-06-05 15:02:45,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:45,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:45,263 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:45,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,477 INFO L430 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:45,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:45,477 INFO L82 PathProgramCache]: Analyzing trace with hash -297300711, now seen corresponding path program 1 times [2021-06-05 15:02:45,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:45,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482614414] [2021-06-05 15:02:45,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:45,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:45,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,516 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:45,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482614414] [2021-06-05 15:02:45,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482614414] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,516 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954794489] [2021-06-05 15:02:45,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:45,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:45,545 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:45,545 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:45,598 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2021-06-05 15:02:45,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:45,600 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:45,601 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:45,601 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:14, output treesize:7 [2021-06-05 15:02:45,621 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:45,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [954794489] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:45,621 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:45,621 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:45,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076621871] [2021-06-05 15:02:45,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:45,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:45,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:45,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:45,622 INFO L87 Difference]: Start difference. First operand 882 states and 3536 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:45,845 INFO L93 Difference]: Finished difference Result 1282 states and 5074 transitions. [2021-06-05 15:02:45,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:02:45,845 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:45,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:45,848 INFO L225 Difference]: With dead ends: 1282 [2021-06-05 15:02:45,848 INFO L226 Difference]: Without dead ends: 1273 [2021-06-05 15:02:45,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 130.1ms TimeCoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:02:45,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1273 states. [2021-06-05 15:02:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1273 to 909. [2021-06-05 15:02:45,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 909 states, 908 states have (on average 4.02863436123348) internal successors, (3658), 908 states have internal predecessors, (3658), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 909 states to 909 states and 3658 transitions. [2021-06-05 15:02:45,867 INFO L78 Accepts]: Start accepts. Automaton has 909 states and 3658 transitions. Word has length 19 [2021-06-05 15:02:45,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:45,867 INFO L482 AbstractCegarLoop]: Abstraction has 909 states and 3658 transitions. [2021-06-05 15:02:45,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:45,867 INFO L276 IsEmpty]: Start isEmpty. Operand 909 states and 3658 transitions. [2021-06-05 15:02:45,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:45,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:45,869 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:46,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-06-05 15:02:46,085 INFO L430 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:46,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:46,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1801002105, now seen corresponding path program 1 times [2021-06-05 15:02:46,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:46,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063270205] [2021-06-05 15:02:46,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:46,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,148 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:46,148 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:46,148 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063270205] [2021-06-05 15:02:46,148 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1063270205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,149 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192268317] [2021-06-05 15:02:46,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:46,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,175 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:46,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:46,226 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2021-06-05 15:02:46,227 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:46,230 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:46,230 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:46,230 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:9 [2021-06-05 15:02:46,252 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:46,252 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192268317] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,252 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:46,252 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:46,253 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818353929] [2021-06-05 15:02:46,253 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:46,253 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:46,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:46,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:46,253 INFO L87 Difference]: Start difference. First operand 909 states and 3658 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:46,490 INFO L93 Difference]: Finished difference Result 1460 states and 5766 transitions. [2021-06-05 15:02:46,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:46,491 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:46,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:46,494 INFO L225 Difference]: With dead ends: 1460 [2021-06-05 15:02:46,494 INFO L226 Difference]: Without dead ends: 1451 [2021-06-05 15:02:46,495 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 183.1ms TimeCoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:46,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1451 states. [2021-06-05 15:02:46,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1451 to 897. [2021-06-05 15:02:46,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 897 states, 896 states have (on average 4.011160714285714) internal successors, (3594), 896 states have internal predecessors, (3594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 897 states to 897 states and 3594 transitions. [2021-06-05 15:02:46,518 INFO L78 Accepts]: Start accepts. Automaton has 897 states and 3594 transitions. Word has length 19 [2021-06-05 15:02:46,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:46,519 INFO L482 AbstractCegarLoop]: Abstraction has 897 states and 3594 transitions. [2021-06-05 15:02:46,519 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:46,519 INFO L276 IsEmpty]: Start isEmpty. Operand 897 states and 3594 transitions. [2021-06-05 15:02:46,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:46,520 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:46,520 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:46,736 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:46,737 INFO L430 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:46,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:46,737 INFO L82 PathProgramCache]: Analyzing trace with hash -1692671303, now seen corresponding path program 2 times [2021-06-05 15:02:46,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:46,737 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37131463] [2021-06-05 15:02:46,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:46,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:46,792 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:46,792 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37131463] [2021-06-05 15:02:46,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37131463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,792 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792353346] [2021-06-05 15:02:46,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:46,818 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:46,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:46,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:02:46,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:46,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:46,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:46,852 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:46,858 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:46,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:46,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 15:02:46,898 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:46,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792353346] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:46,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:46,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:46,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1145482772] [2021-06-05 15:02:46,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:46,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:46,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:46,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:46,900 INFO L87 Difference]: Start difference. First operand 897 states and 3594 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:47,169 INFO L93 Difference]: Finished difference Result 1101 states and 4371 transitions. [2021-06-05 15:02:47,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:47,169 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:47,169 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:47,172 INFO L225 Difference]: With dead ends: 1101 [2021-06-05 15:02:47,172 INFO L226 Difference]: Without dead ends: 1092 [2021-06-05 15:02:47,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 240.8ms TimeCoverageRelationStatistics Valid=108, Invalid=312, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:47,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1092 states. [2021-06-05 15:02:47,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1092 to 903. [2021-06-05 15:02:47,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 903 states, 902 states have (on average 4.011086474501108) internal successors, (3618), 902 states have internal predecessors, (3618), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 903 states to 903 states and 3618 transitions. [2021-06-05 15:02:47,187 INFO L78 Accepts]: Start accepts. Automaton has 903 states and 3618 transitions. Word has length 19 [2021-06-05 15:02:47,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:47,187 INFO L482 AbstractCegarLoop]: Abstraction has 903 states and 3618 transitions. [2021-06-05 15:02:47,187 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,187 INFO L276 IsEmpty]: Start isEmpty. Operand 903 states and 3618 transitions. [2021-06-05 15:02:47,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:47,189 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:47,189 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:47,404 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,18 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:47,405 INFO L430 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:47,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:47,405 INFO L82 PathProgramCache]: Analyzing trace with hash 724489687, now seen corresponding path program 3 times [2021-06-05 15:02:47,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:47,405 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759203840] [2021-06-05 15:02:47,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:47,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:47,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:47,451 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759203840] [2021-06-05 15:02:47,451 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759203840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,451 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [970185065] [2021-06-05 15:02:47,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:47,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:47,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:47,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:02:47,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:47,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:47,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:47,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:47,524 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:47,525 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:47,525 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 15:02:47,582 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:47,582 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [970185065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:47,582 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:47,582 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:47,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901040441] [2021-06-05 15:02:47,583 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:47,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:47,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:47,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:47,583 INFO L87 Difference]: Start difference. First operand 903 states and 3618 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:47,855 INFO L93 Difference]: Finished difference Result 1099 states and 4367 transitions. [2021-06-05 15:02:47,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:47,855 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:47,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:47,858 INFO L225 Difference]: With dead ends: 1099 [2021-06-05 15:02:47,858 INFO L226 Difference]: Without dead ends: 1087 [2021-06-05 15:02:47,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 232.2ms TimeCoverageRelationStatistics Valid=107, Invalid=313, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:47,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1087 states. [2021-06-05 15:02:47,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1087 to 912. [2021-06-05 15:02:47,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 912 states, 911 states have (on average 4.010976948408342) internal successors, (3654), 911 states have internal predecessors, (3654), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 912 states to 912 states and 3654 transitions. [2021-06-05 15:02:47,874 INFO L78 Accepts]: Start accepts. Automaton has 912 states and 3654 transitions. Word has length 19 [2021-06-05 15:02:47,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:47,874 INFO L482 AbstractCegarLoop]: Abstraction has 912 states and 3654 transitions. [2021-06-05 15:02:47,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:47,874 INFO L276 IsEmpty]: Start isEmpty. Operand 912 states and 3654 transitions. [2021-06-05 15:02:47,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:47,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:47,877 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:48,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2021-06-05 15:02:48,093 INFO L430 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:48,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:48,093 INFO L82 PathProgramCache]: Analyzing trace with hash -981852199, now seen corresponding path program 2 times [2021-06-05 15:02:48,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:48,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182776702] [2021-06-05 15:02:48,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:48,097 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,139 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182776702] [2021-06-05 15:02:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182776702] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,139 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575431376] [2021-06-05 15:02:48,139 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,167 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:48,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:48,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:02:48,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,208 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:48,209 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:48,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,215 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,215 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 15:02:48,259 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575431376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:48,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:48,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397499092] [2021-06-05 15:02:48,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:48,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,260 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:48,260 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:48,260 INFO L87 Difference]: Start difference. First operand 912 states and 3654 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:48,558 INFO L93 Difference]: Finished difference Result 1135 states and 4511 transitions. [2021-06-05 15:02:48,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:48,558 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:48,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:48,561 INFO L225 Difference]: With dead ends: 1135 [2021-06-05 15:02:48,561 INFO L226 Difference]: Without dead ends: 1126 [2021-06-05 15:02:48,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 257.9ms TimeCoverageRelationStatistics Valid=110, Invalid=310, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:48,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1126 states. [2021-06-05 15:02:48,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1126 to 920. [2021-06-05 15:02:48,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 920 states, 919 states have (on average 4.0108813928182805) internal successors, (3686), 919 states have internal predecessors, (3686), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 920 states to 920 states and 3686 transitions. [2021-06-05 15:02:48,576 INFO L78 Accepts]: Start accepts. Automaton has 920 states and 3686 transitions. Word has length 19 [2021-06-05 15:02:48,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:48,576 INFO L482 AbstractCegarLoop]: Abstraction has 920 states and 3686 transitions. [2021-06-05 15:02:48,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:48,576 INFO L276 IsEmpty]: Start isEmpty. Operand 920 states and 3686 transitions. [2021-06-05 15:02:48,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:48,578 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:48,578 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:48,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,20 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,795 INFO L430 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:48,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:48,795 INFO L82 PathProgramCache]: Analyzing trace with hash 750463959, now seen corresponding path program 3 times [2021-06-05 15:02:48,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:48,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340994711] [2021-06-05 15:02:48,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:48,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:48,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,838 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:48,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340994711] [2021-06-05 15:02:48,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340994711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,838 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [580407338] [2021-06-05 15:02:48,838 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:48,862 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:02:48,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:48,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 19 conjunts are in the unsatisfiable core [2021-06-05 15:02:48,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:48,901 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:48,902 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:48,908 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:48,909 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:48,909 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:22, output treesize:20 [2021-06-05 15:02:48,958 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:48,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [580407338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:48,958 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:48,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:48,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [971979945] [2021-06-05 15:02:48,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:48,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:48,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:48,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:48,960 INFO L87 Difference]: Start difference. First operand 920 states and 3686 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:49,283 INFO L93 Difference]: Finished difference Result 1134 states and 4509 transitions. [2021-06-05 15:02:49,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:02:49,283 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:49,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:49,286 INFO L225 Difference]: With dead ends: 1134 [2021-06-05 15:02:49,286 INFO L226 Difference]: Without dead ends: 1122 [2021-06-05 15:02:49,286 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 279.3ms TimeCoverageRelationStatistics Valid=109, Invalid=311, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:02:49,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1122 states. [2021-06-05 15:02:49,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1122 to 924. [2021-06-05 15:02:49,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 924 states, 923 states have (on average 4.010834236186349) internal successors, (3702), 923 states have internal predecessors, (3702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 924 states to 924 states and 3702 transitions. [2021-06-05 15:02:49,303 INFO L78 Accepts]: Start accepts. Automaton has 924 states and 3702 transitions. Word has length 19 [2021-06-05 15:02:49,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:49,304 INFO L482 AbstractCegarLoop]: Abstraction has 924 states and 3702 transitions. [2021-06-05 15:02:49,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 924 states and 3702 transitions. [2021-06-05 15:02:49,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:49,305 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:49,305 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:49,520 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-06-05 15:02:49,521 INFO L430 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:49,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:49,521 INFO L82 PathProgramCache]: Analyzing trace with hash -322425755, now seen corresponding path program 4 times [2021-06-05 15:02:49,521 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:49,521 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [32970065] [2021-06-05 15:02:49,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:49,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:49,570 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:49,571 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:49,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [32970065] [2021-06-05 15:02:49,571 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [32970065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:49,571 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222465704] [2021-06-05 15:02:49,571 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:49,597 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:49,597 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:49,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:49,634 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:02:49,635 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:49,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:49,639 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:49,639 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 15:02:49,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:49,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [222465704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:49,669 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:49,669 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:49,669 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1456937491] [2021-06-05 15:02:49,669 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:49,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:49,670 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:49,670 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:49,670 INFO L87 Difference]: Start difference. First operand 924 states and 3702 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:49,909 INFO L93 Difference]: Finished difference Result 1347 states and 5299 transitions. [2021-06-05 15:02:49,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:02:49,909 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:49,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:49,923 INFO L225 Difference]: With dead ends: 1347 [2021-06-05 15:02:49,923 INFO L226 Difference]: Without dead ends: 1303 [2021-06-05 15:02:49,923 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 194.3ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:49,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1303 states. [2021-06-05 15:02:49,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1303 to 958. [2021-06-05 15:02:49,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 958 states, 957 states have (on average 4.020898641588297) internal successors, (3848), 957 states have internal predecessors, (3848), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 958 states to 958 states and 3848 transitions. [2021-06-05 15:02:49,939 INFO L78 Accepts]: Start accepts. Automaton has 958 states and 3848 transitions. Word has length 19 [2021-06-05 15:02:49,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:49,940 INFO L482 AbstractCegarLoop]: Abstraction has 958 states and 3848 transitions. [2021-06-05 15:02:49,940 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:49,940 INFO L276 IsEmpty]: Start isEmpty. Operand 958 states and 3848 transitions. [2021-06-05 15:02:49,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:49,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:49,941 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:50,157 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2021-06-05 15:02:50,157 INFO L430 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:50,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:50,157 INFO L82 PathProgramCache]: Analyzing trace with hash 2094735235, now seen corresponding path program 5 times [2021-06-05 15:02:50,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:50,157 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148073937] [2021-06-05 15:02:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:50,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:50,201 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,201 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:50,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148073937] [2021-06-05 15:02:50,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [148073937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,202 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280773408] [2021-06-05 15:02:50,202 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,237 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:02:50,237 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:50,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:50,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:50,270 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:02:50,271 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:50,274 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:50,274 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:50,274 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 15:02:50,302 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,302 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280773408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,302 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:50,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:50,303 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481933083] [2021-06-05 15:02:50,303 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:50,303 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:50,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:50,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:50,303 INFO L87 Difference]: Start difference. First operand 958 states and 3848 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:50,565 INFO L93 Difference]: Finished difference Result 1389 states and 5495 transitions. [2021-06-05 15:02:50,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:02:50,566 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:50,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:50,569 INFO L225 Difference]: With dead ends: 1389 [2021-06-05 15:02:50,569 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 15:02:50,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 177.6ms TimeCoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:50,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 15:02:50,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 991. [2021-06-05 15:02:50,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 991 states, 990 states have (on average 4.042424242424242) internal successors, (4002), 990 states have internal predecessors, (4002), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 991 states to 991 states and 4002 transitions. [2021-06-05 15:02:50,586 INFO L78 Accepts]: Start accepts. Automaton has 991 states and 4002 transitions. Word has length 19 [2021-06-05 15:02:50,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:50,586 INFO L482 AbstractCegarLoop]: Abstraction has 991 states and 4002 transitions. [2021-06-05 15:02:50,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:50,586 INFO L276 IsEmpty]: Start isEmpty. Operand 991 states and 4002 transitions. [2021-06-05 15:02:50,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:50,588 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:50,588 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:50,800 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,801 INFO L430 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:50,801 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:50,801 INFO L82 PathProgramCache]: Analyzing trace with hash 486420053, now seen corresponding path program 6 times [2021-06-05 15:02:50,801 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:50,801 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142450390] [2021-06-05 15:02:50,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:50,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:50,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,837 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:50,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142450390] [2021-06-05 15:02:50,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142450390] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,837 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017241474] [2021-06-05 15:02:50,837 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:50,872 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:50,872 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:50,873 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:50,873 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:50,909 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:50,909 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 13 treesize of output 17 [2021-06-05 15:02:50,910 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:50,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:50,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:50,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:16, output treesize:14 [2021-06-05 15:02:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:50,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2017241474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:50,943 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:50,943 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 10 [2021-06-05 15:02:50,943 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800922783] [2021-06-05 15:02:50,943 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:50,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:50,944 INFO L87 Difference]: Start difference. First operand 991 states and 4002 transitions. Second operand has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:51,049 INFO L93 Difference]: Finished difference Result 1261 states and 5037 transitions. [2021-06-05 15:02:51,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:51,049 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:51,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:51,051 INFO L225 Difference]: With dead ends: 1261 [2021-06-05 15:02:51,051 INFO L226 Difference]: Without dead ends: 1246 [2021-06-05 15:02:51,051 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 71.8ms TimeCoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:51,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1246 states. [2021-06-05 15:02:51,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1246 to 1001. [2021-06-05 15:02:51,065 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1001 states, 1000 states have (on average 4.04) internal successors, (4040), 1000 states have internal predecessors, (4040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1001 states to 1001 states and 4040 transitions. [2021-06-05 15:02:51,067 INFO L78 Accepts]: Start accepts. Automaton has 1001 states and 4040 transitions. Word has length 19 [2021-06-05 15:02:51,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:51,067 INFO L482 AbstractCegarLoop]: Abstraction has 1001 states and 4040 transitions. [2021-06-05 15:02:51,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 2.8181818181818183) internal successors, (31), 10 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,067 INFO L276 IsEmpty]: Start isEmpty. Operand 1001 states and 4040 transitions. [2021-06-05 15:02:51,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:51,069 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:51,069 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:51,285 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-06-05 15:02:51,285 INFO L430 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:51,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:51,285 INFO L82 PathProgramCache]: Analyzing trace with hash -967847337, now seen corresponding path program 4 times [2021-06-05 15:02:51,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:51,286 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279501156] [2021-06-05 15:02:51,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:51,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:51,337 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:51,337 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:51,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279501156] [2021-06-05 15:02:51,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279501156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,337 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [439356438] [2021-06-05 15:02:51,337 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:51,364 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:51,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:51,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:51,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:51,387 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:51,388 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:51,388 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:51,394 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:51,394 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:51,394 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:18 [2021-06-05 15:02:51,441 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:51,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [439356438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:51,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 15:02:51,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755553075] [2021-06-05 15:02:51,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:02:51,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:51,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:02:51,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:02:51,442 INFO L87 Difference]: Start difference. First operand 1001 states and 4040 transitions. Second operand has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:51,514 INFO L93 Difference]: Finished difference Result 1212 states and 4842 transitions. [2021-06-05 15:02:51,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:51,515 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:51,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:51,517 INFO L225 Difference]: With dead ends: 1212 [2021-06-05 15:02:51,517 INFO L226 Difference]: Without dead ends: 1188 [2021-06-05 15:02:51,517 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 73.4ms TimeCoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:51,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1188 states. [2021-06-05 15:02:51,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1188 to 1014. [2021-06-05 15:02:51,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1014 states, 1013 states have (on average 4.036525172754195) internal successors, (4089), 1013 states have internal predecessors, (4089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1014 states to 1014 states and 4089 transitions. [2021-06-05 15:02:51,532 INFO L78 Accepts]: Start accepts. Automaton has 1014 states and 4089 transitions. Word has length 19 [2021-06-05 15:02:51,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:51,532 INFO L482 AbstractCegarLoop]: Abstraction has 1014 states and 4089 transitions. [2021-06-05 15:02:51,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.2) internal successors, (32), 9 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:51,532 INFO L276 IsEmpty]: Start isEmpty. Operand 1014 states and 4089 transitions. [2021-06-05 15:02:51,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:51,534 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:51,534 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:51,744 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:51,745 INFO L430 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:51,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:51,745 INFO L82 PathProgramCache]: Analyzing trace with hash 764468821, now seen corresponding path program 5 times [2021-06-05 15:02:51,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:51,745 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49754515] [2021-06-05 15:02:51,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:51,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:51,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:51,796 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:51,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49754515] [2021-06-05 15:02:51,796 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49754515] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,796 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324457583] [2021-06-05 15:02:51,797 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:51,823 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:02:51,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:51,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 21 conjunts are in the unsatisfiable core [2021-06-05 15:02:51,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:51,853 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2021-06-05 15:02:51,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:51,856 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:51,857 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:51,857 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:10 [2021-06-05 15:02:51,886 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:51,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324457583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:51,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:51,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2021-06-05 15:02:51,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503419383] [2021-06-05 15:02:51,887 INFO L462 AbstractCegarLoop]: Interpolant automaton has 12 states [2021-06-05 15:02:51,887 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:51,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2021-06-05 15:02:51,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2021-06-05 15:02:51,887 INFO L87 Difference]: Start difference. First operand 1014 states and 4089 transitions. Second operand has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:52,128 INFO L93 Difference]: Finished difference Result 1376 states and 5493 transitions. [2021-06-05 15:02:52,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:02:52,128 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:52,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:52,130 INFO L225 Difference]: With dead ends: 1376 [2021-06-05 15:02:52,130 INFO L226 Difference]: Without dead ends: 1359 [2021-06-05 15:02:52,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 36 ImplicationChecksByTransitivity, 199.0ms TimeCoverageRelationStatistics Valid=82, Invalid=224, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:02:52,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1359 states. [2021-06-05 15:02:52,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1359 to 1018. [2021-06-05 15:02:52,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1018 states, 1017 states have (on average 4.03638151425762) internal successors, (4105), 1017 states have internal predecessors, (4105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1018 states to 1018 states and 4105 transitions. [2021-06-05 15:02:52,147 INFO L78 Accepts]: Start accepts. Automaton has 1018 states and 4105 transitions. Word has length 19 [2021-06-05 15:02:52,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:52,147 INFO L482 AbstractCegarLoop]: Abstraction has 1018 states and 4105 transitions. [2021-06-05 15:02:52,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 12 states, 12 states have (on average 3.0833333333333335) internal successors, (37), 11 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,147 INFO L276 IsEmpty]: Start isEmpty. Operand 1018 states and 4105 transitions. [2021-06-05 15:02:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2021-06-05 15:02:52,149 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:52,149 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:52,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-06-05 15:02:52,365 INFO L430 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:52,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:52,365 INFO L82 PathProgramCache]: Analyzing trace with hash -1342315299, now seen corresponding path program 6 times [2021-06-05 15:02:52,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:52,365 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [238074583] [2021-06-05 15:02:52,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:52,433 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,433 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [238074583] [2021-06-05 15:02:52,433 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [238074583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,433 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1735643801] [2021-06-05 15:02:52,433 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:52,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:52,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:52,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 74 conjuncts, 15 conjunts are in the unsatisfiable core [2021-06-05 15:02:52,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:52,498 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,499 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 15 [2021-06-05 15:02:52,500 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:02:52,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:52,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:52,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:17, output treesize:15 [2021-06-05 15:02:52,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,541 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1735643801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,541 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:52,541 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 9 [2021-06-05 15:02:52,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [493694314] [2021-06-05 15:02:52,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 10 states [2021-06-05 15:02:52,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:52,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2021-06-05 15:02:52,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:02:52,541 INFO L87 Difference]: Start difference. First operand 1018 states and 4105 transitions. Second operand has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:52,632 INFO L93 Difference]: Finished difference Result 1318 states and 5270 transitions. [2021-06-05 15:02:52,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-06-05 15:02:52,632 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2021-06-05 15:02:52,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:52,634 INFO L225 Difference]: With dead ends: 1318 [2021-06-05 15:02:52,634 INFO L226 Difference]: Without dead ends: 1301 [2021-06-05 15:02:52,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 57.6ms TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:52,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1301 states. [2021-06-05 15:02:52,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1301 to 1022. [2021-06-05 15:02:52,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1022 states, 1021 states have (on average 4.040156709108717) internal successors, (4125), 1021 states have internal predecessors, (4125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1022 states to 1022 states and 4125 transitions. [2021-06-05 15:02:52,649 INFO L78 Accepts]: Start accepts. Automaton has 1022 states and 4125 transitions. Word has length 19 [2021-06-05 15:02:52,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:52,650 INFO L482 AbstractCegarLoop]: Abstraction has 1022 states and 4125 transitions. [2021-06-05 15:02:52,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 10 states, 10 states have (on average 3.0) internal successors, (30), 9 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,650 INFO L276 IsEmpty]: Start isEmpty. Operand 1022 states and 4125 transitions. [2021-06-05 15:02:52,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:02:52,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:52,651 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:52,864 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:52,865 INFO L430 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:52,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:52,865 INFO L82 PathProgramCache]: Analyzing trace with hash -1382222734, now seen corresponding path program 7 times [2021-06-05 15:02:52,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:52,865 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2092843731] [2021-06-05 15:02:52,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:52,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:52,883 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2092843731] [2021-06-05 15:02:52,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2092843731] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869174361] [2021-06-05 15:02:52,883 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:52,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:52,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:02:52,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:52,956 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:52,956 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [869174361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:52,956 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:52,956 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4] total 7 [2021-06-05 15:02:52,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1959546308] [2021-06-05 15:02:52,956 INFO L462 AbstractCegarLoop]: Interpolant automaton has 8 states [2021-06-05 15:02:52,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:52,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2021-06-05 15:02:52,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2021-06-05 15:02:52,957 INFO L87 Difference]: Start difference. First operand 1022 states and 4125 transitions. Second operand has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:52,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:52,999 INFO L93 Difference]: Finished difference Result 2014 states and 7938 transitions. [2021-06-05 15:02:53,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-06-05 15:02:53,000 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:02:53,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:53,003 INFO L225 Difference]: With dead ends: 2014 [2021-06-05 15:02:53,003 INFO L226 Difference]: Without dead ends: 1951 [2021-06-05 15:02:53,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 18.0ms TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:53,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1951 states. [2021-06-05 15:02:53,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1951 to 1571. [2021-06-05 15:02:53,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1571 states, 1570 states have (on average 4.067515923566879) internal successors, (6386), 1570 states have internal predecessors, (6386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1571 states to 1571 states and 6386 transitions. [2021-06-05 15:02:53,034 INFO L78 Accepts]: Start accepts. Automaton has 1571 states and 6386 transitions. Word has length 21 [2021-06-05 15:02:53,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:53,034 INFO L482 AbstractCegarLoop]: Abstraction has 1571 states and 6386 transitions. [2021-06-05 15:02:53,034 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 8 states, 8 states have (on average 4.875) internal successors, (39), 7 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,034 INFO L276 IsEmpty]: Start isEmpty. Operand 1571 states and 6386 transitions. [2021-06-05 15:02:53,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:02:53,037 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:53,037 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:53,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2021-06-05 15:02:53,253 INFO L430 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:53,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:53,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1995857238, now seen corresponding path program 8 times [2021-06-05 15:02:53,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:53,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219752000] [2021-06-05 15:02:53,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:53,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:53,284 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:53,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:53,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219752000] [2021-06-05 15:02:53,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [219752000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1330869687] [2021-06-05 15:02:53,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:53,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:53,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:53,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 6 conjunts are in the unsatisfiable core [2021-06-05 15:02:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:53,343 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:53,343 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1330869687] provided 1 perfect and 0 imperfect interpolant sequences [2021-06-05 15:02:53,343 INFO L226 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2021-06-05 15:02:53,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 9 [2021-06-05 15:02:53,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [35495020] [2021-06-05 15:02:53,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 5 states [2021-06-05 15:02:53,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:53,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2021-06-05 15:02:53,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:02:53,344 INFO L87 Difference]: Start difference. First operand 1571 states and 6386 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:53,370 INFO L93 Difference]: Finished difference Result 2412 states and 9687 transitions. [2021-06-05 15:02:53,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2021-06-05 15:02:53,370 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:02:53,370 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:53,374 INFO L225 Difference]: With dead ends: 2412 [2021-06-05 15:02:53,374 INFO L226 Difference]: Without dead ends: 2339 [2021-06-05 15:02:53,376 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 28.9ms TimeCoverageRelationStatistics Valid=35, Invalid=55, Unknown=0, NotChecked=0, Total=90 [2021-06-05 15:02:53,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2339 states. [2021-06-05 15:02:53,399 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2339 to 1746. [2021-06-05 15:02:53,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1746 states, 1745 states have (on average 4.050429799426934) internal successors, (7068), 1745 states have internal predecessors, (7068), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1746 states to 1746 states and 7068 transitions. [2021-06-05 15:02:53,408 INFO L78 Accepts]: Start accepts. Automaton has 1746 states and 7068 transitions. Word has length 21 [2021-06-05 15:02:53,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:53,409 INFO L482 AbstractCegarLoop]: Abstraction has 1746 states and 7068 transitions. [2021-06-05 15:02:53,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 4 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,409 INFO L276 IsEmpty]: Start isEmpty. Operand 1746 states and 7068 transitions. [2021-06-05 15:02:53,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2021-06-05 15:02:53,412 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:53,412 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:53,613 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:53,613 INFO L430 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:53,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:53,613 INFO L82 PathProgramCache]: Analyzing trace with hash -173194186, now seen corresponding path program 9 times [2021-06-05 15:02:53,613 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:53,613 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962452087] [2021-06-05 15:02:53,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:53,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:53,639 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:02:53,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962452087] [2021-06-05 15:02:53,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962452087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950656306] [2021-06-05 15:02:53,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:53,677 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:02:53,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:53,678 INFO L263 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:02:53,678 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:53,723 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:53,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950656306] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:53,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:53,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5] total 8 [2021-06-05 15:02:53,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146355032] [2021-06-05 15:02:53,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 9 states [2021-06-05 15:02:53,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:53,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2021-06-05 15:02:53,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2021-06-05 15:02:53,725 INFO L87 Difference]: Start difference. First operand 1746 states and 7068 transitions. Second operand has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:53,807 INFO L93 Difference]: Finished difference Result 2801 states and 11129 transitions. [2021-06-05 15:02:53,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:02:53,808 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2021-06-05 15:02:53,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:53,812 INFO L225 Difference]: With dead ends: 2801 [2021-06-05 15:02:53,812 INFO L226 Difference]: Without dead ends: 2786 [2021-06-05 15:02:53,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 53.1ms TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2021-06-05 15:02:53,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2786 states. [2021-06-05 15:02:53,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2786 to 2373. [2021-06-05 15:02:53,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2373 states, 2372 states have (on average 4.099494097807757) internal successors, (9724), 2372 states have internal predecessors, (9724), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2373 states to 2373 states and 9724 transitions. [2021-06-05 15:02:53,847 INFO L78 Accepts]: Start accepts. Automaton has 2373 states and 9724 transitions. Word has length 21 [2021-06-05 15:02:53,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:53,847 INFO L482 AbstractCegarLoop]: Abstraction has 2373 states and 9724 transitions. [2021-06-05 15:02:53,847 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 9 states, 9 states have (on average 4.555555555555555) internal successors, (41), 8 states have internal predecessors, (41), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:53,848 INFO L276 IsEmpty]: Start isEmpty. Operand 2373 states and 9724 transitions. [2021-06-05 15:02:53,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:02:53,851 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:53,851 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:54,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-06-05 15:02:54,065 INFO L430 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:54,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:54,065 INFO L82 PathProgramCache]: Analyzing trace with hash 253599539, now seen corresponding path program 10 times [2021-06-05 15:02:54,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:54,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1679088922] [2021-06-05 15:02:54,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:54,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:54,214 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:54,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:54,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1679088922] [2021-06-05 15:02:54,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1679088922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:54,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706080708] [2021-06-05 15:02:54,215 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:54,239 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:02:54,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:54,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:54,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:54,350 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:54,350 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:02:54,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:54,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:54,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:54,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:02:54,447 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:54,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [706080708] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:54,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:54,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:54,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [793558793] [2021-06-05 15:02:54,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:54,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:54,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:54,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:54,449 INFO L87 Difference]: Start difference. First operand 2373 states and 9724 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:55,201 INFO L93 Difference]: Finished difference Result 2708 states and 11032 transitions. [2021-06-05 15:02:55,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:02:55,202 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:02:55,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:55,206 INFO L225 Difference]: With dead ends: 2708 [2021-06-05 15:02:55,206 INFO L226 Difference]: Without dead ends: 2703 [2021-06-05 15:02:55,207 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 552.4ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:02:55,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2703 states. [2021-06-05 15:02:55,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2703 to 2417. [2021-06-05 15:02:55,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2417 states, 2416 states have (on average 4.112996688741722) internal successors, (9937), 2416 states have internal predecessors, (9937), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2417 states to 2417 states and 9937 transitions. [2021-06-05 15:02:55,242 INFO L78 Accepts]: Start accepts. Automaton has 2417 states and 9937 transitions. Word has length 23 [2021-06-05 15:02:55,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:55,242 INFO L482 AbstractCegarLoop]: Abstraction has 2417 states and 9937 transitions. [2021-06-05 15:02:55,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2417 states and 9937 transitions. [2021-06-05 15:02:55,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:02:55,246 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:55,246 INFO L521 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:55,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:55,461 INFO L430 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:55,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:55,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1782556683, now seen corresponding path program 11 times [2021-06-05 15:02:55,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:55,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370716316] [2021-06-05 15:02:55,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:55,489 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 6 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:55,489 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:55,489 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370716316] [2021-06-05 15:02:55,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370716316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:55,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008781224] [2021-06-05 15:02:55,490 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:55,524 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:02:55,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:55,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 7 conjunts are in the unsatisfiable core [2021-06-05 15:02:55,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:55,570 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 9 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:55,570 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2008781224] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:55,570 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:55,570 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 10 [2021-06-05 15:02:55,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840064919] [2021-06-05 15:02:55,571 INFO L462 AbstractCegarLoop]: Interpolant automaton has 11 states [2021-06-05 15:02:55,571 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:55,571 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2021-06-05 15:02:55,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2021-06-05 15:02:55,571 INFO L87 Difference]: Start difference. First operand 2417 states and 9937 transitions. Second operand has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:55,672 INFO L93 Difference]: Finished difference Result 4616 states and 18575 transitions. [2021-06-05 15:02:55,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-06-05 15:02:55,672 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:02:55,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:55,680 INFO L225 Difference]: With dead ends: 4616 [2021-06-05 15:02:55,681 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 15:02:55,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 20 ImplicationChecksByTransitivity, 54.9ms TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2021-06-05 15:02:55,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 15:02:55,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 2839. [2021-06-05 15:02:55,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2839 states, 2838 states have (on average 4.137420718816068) internal successors, (11742), 2838 states have internal predecessors, (11742), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2839 states to 2839 states and 11742 transitions. [2021-06-05 15:02:55,729 INFO L78 Accepts]: Start accepts. Automaton has 2839 states and 11742 transitions. Word has length 23 [2021-06-05 15:02:55,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:55,729 INFO L482 AbstractCegarLoop]: Abstraction has 2839 states and 11742 transitions. [2021-06-05 15:02:55,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 11 states, 11 states have (on average 4.090909090909091) internal successors, (45), 10 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:55,729 INFO L276 IsEmpty]: Start isEmpty. Operand 2839 states and 11742 transitions. [2021-06-05 15:02:55,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:02:55,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:55,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:55,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-06-05 15:02:55,938 INFO L430 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:55,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:55,938 INFO L82 PathProgramCache]: Analyzing trace with hash 118811635, now seen corresponding path program 12 times [2021-06-05 15:02:55,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:55,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513355578] [2021-06-05 15:02:55,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:56,059 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:56,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513355578] [2021-06-05 15:02:56,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513355578] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602348377] [2021-06-05 15:02:56,060 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:56,085 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:02:56,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:56,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:56,086 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:56,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:56,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:02:56,226 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:56,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:56,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:56,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:02:56,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:56,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602348377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:56,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:56,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:56,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064200026] [2021-06-05 15:02:56,313 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:56,313 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:56,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:56,313 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:56,313 INFO L87 Difference]: Start difference. First operand 2839 states and 11742 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:57,191 INFO L93 Difference]: Finished difference Result 3383 states and 13890 transitions. [2021-06-05 15:02:57,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:02:57,192 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:02:57,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:57,197 INFO L225 Difference]: With dead ends: 3383 [2021-06-05 15:02:57,198 INFO L226 Difference]: Without dead ends: 3361 [2021-06-05 15:02:57,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=164, Invalid=828, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:02:57,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3361 states. [2021-06-05 15:02:57,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3361 to 2851. [2021-06-05 15:02:57,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2851 states, 2850 states have (on average 4.1375438596491225) internal successors, (11792), 2850 states have internal predecessors, (11792), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2851 states to 2851 states and 11792 transitions. [2021-06-05 15:02:57,242 INFO L78 Accepts]: Start accepts. Automaton has 2851 states and 11792 transitions. Word has length 23 [2021-06-05 15:02:57,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:57,242 INFO L482 AbstractCegarLoop]: Abstraction has 2851 states and 11792 transitions. [2021-06-05 15:02:57,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:57,242 INFO L276 IsEmpty]: Start isEmpty. Operand 2851 states and 11792 transitions. [2021-06-05 15:02:57,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:02:57,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:57,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:57,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-06-05 15:02:57,461 INFO L430 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:57,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:57,461 INFO L82 PathProgramCache]: Analyzing trace with hash 704145587, now seen corresponding path program 13 times [2021-06-05 15:02:57,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:57,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309385544] [2021-06-05 15:02:57,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:57,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:57,584 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:57,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309385544] [2021-06-05 15:02:57,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309385544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:57,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981487445] [2021-06-05 15:02:57,584 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:57,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:57,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:57,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:57,714 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:57,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:02:57,716 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:57,724 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:57,724 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:57,724 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:02:57,823 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:57,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [981487445] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:57,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:57,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:57,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633645783] [2021-06-05 15:02:57,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:57,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:57,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:57,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:57,824 INFO L87 Difference]: Start difference. First operand 2851 states and 11792 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:02:58,640 INFO L93 Difference]: Finished difference Result 3278 states and 13451 transitions. [2021-06-05 15:02:58,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:02:58,640 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:02:58,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:02:58,646 INFO L225 Difference]: With dead ends: 3278 [2021-06-05 15:02:58,646 INFO L226 Difference]: Without dead ends: 3252 [2021-06-05 15:02:58,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 746.2ms TimeCoverageRelationStatistics Valid=177, Invalid=815, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:02:58,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3252 states. [2021-06-05 15:02:58,678 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3252 to 2867. [2021-06-05 15:02:58,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2867 states, 2866 states have (on average 4.136775994417306) internal successors, (11856), 2866 states have internal predecessors, (11856), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2867 states to 2867 states and 11856 transitions. [2021-06-05 15:02:58,687 INFO L78 Accepts]: Start accepts. Automaton has 2867 states and 11856 transitions. Word has length 23 [2021-06-05 15:02:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:02:58,687 INFO L482 AbstractCegarLoop]: Abstraction has 2867 states and 11856 transitions. [2021-06-05 15:02:58,687 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:02:58,688 INFO L276 IsEmpty]: Start isEmpty. Operand 2867 states and 11856 transitions. [2021-06-05 15:02:58,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:02:58,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:02:58,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:02:58,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-06-05 15:02:58,908 INFO L430 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:02:58,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:02:58,909 INFO L82 PathProgramCache]: Analyzing trace with hash -1977254975, now seen corresponding path program 14 times [2021-06-05 15:02:58,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:02:58,909 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1292191999] [2021-06-05 15:02:58,909 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:02:58,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:02:59,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:59,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:02:59,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1292191999] [2021-06-05 15:02:59,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1292191999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440969812] [2021-06-05 15:02:59,050 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:02:59,075 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:02:59,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:02:59,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:02:59,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:02:59,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:59,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:02:59,169 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:02:59,177 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:02:59,177 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:02:59,261 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:02:59,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440969812] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:02:59,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:02:59,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:02:59,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946306205] [2021-06-05 15:02:59,262 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:02:59,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:02:59,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:02:59,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:02:59,262 INFO L87 Difference]: Start difference. First operand 2867 states and 11856 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:00,167 INFO L93 Difference]: Finished difference Result 3257 states and 13379 transitions. [2021-06-05 15:03:00,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:00,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:00,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:00,172 INFO L225 Difference]: With dead ends: 3257 [2021-06-05 15:03:00,172 INFO L226 Difference]: Without dead ends: 3236 [2021-06-05 15:03:00,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 772.0ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:00,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3236 states. [2021-06-05 15:03:00,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3236 to 2863. [2021-06-05 15:03:00,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.13696715583508) internal successors, (11840), 2862 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 11840 transitions. [2021-06-05 15:03:00,227 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 11840 transitions. Word has length 23 [2021-06-05 15:03:00,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:00,227 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 11840 transitions. [2021-06-05 15:03:00,227 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:00,227 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 11840 transitions. [2021-06-05 15:03:00,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:00,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:00,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:00,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-06-05 15:03:00,432 INFO L430 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:00,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:00,433 INFO L82 PathProgramCache]: Analyzing trace with hash 273249153, now seen corresponding path program 15 times [2021-06-05 15:03:00,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:00,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438156842] [2021-06-05 15:03:00,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:00,547 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:00,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438156842] [2021-06-05 15:03:00,548 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438156842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,548 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198624553] [2021-06-05 15:03:00,548 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:00,574 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:00,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:00,574 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:00,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:00,728 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:03:00,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 15:03:00,736 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:00,741 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:00,741 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:00,741 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 15:03:00,795 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:00,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198624553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:00,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:00,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:03:00,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411045794] [2021-06-05 15:03:00,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:00,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:00,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:00,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:00,796 INFO L87 Difference]: Start difference. First operand 2863 states and 11840 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:01,429 INFO L93 Difference]: Finished difference Result 3196 states and 13139 transitions. [2021-06-05 15:03:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:01,429 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:01,436 INFO L225 Difference]: With dead ends: 3196 [2021-06-05 15:03:01,436 INFO L226 Difference]: Without dead ends: 3181 [2021-06-05 15:03:01,436 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 468.5ms TimeCoverageRelationStatistics Valid=118, Invalid=812, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:01,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3181 states. [2021-06-05 15:03:01,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3181 to 2863. [2021-06-05 15:03:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2863 states, 2862 states have (on average 4.13696715583508) internal successors, (11840), 2862 states have internal predecessors, (11840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2863 states to 2863 states and 11840 transitions. [2021-06-05 15:03:01,483 INFO L78 Accepts]: Start accepts. Automaton has 2863 states and 11840 transitions. Word has length 23 [2021-06-05 15:03:01,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:01,483 INFO L482 AbstractCegarLoop]: Abstraction has 2863 states and 11840 transitions. [2021-06-05 15:03:01,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:01,483 INFO L276 IsEmpty]: Start isEmpty. Operand 2863 states and 11840 transitions. [2021-06-05 15:03:01,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:01,488 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:01,488 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:01,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:01,701 INFO L430 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:01,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:01,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1462628087, now seen corresponding path program 16 times [2021-06-05 15:03:01,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:01,701 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906665481] [2021-06-05 15:03:01,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:01,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:01,814 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:01,814 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:01,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906665481] [2021-06-05 15:03:01,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906665481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:01,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [968275893] [2021-06-05 15:03:01,815 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:01,849 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:01,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:01,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:01,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:01,954 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:01,955 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:01,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:01,966 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:01,967 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:01,967 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:02,053 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:02,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [968275893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:02,053 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:02,053 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:02,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578936074] [2021-06-05 15:03:02,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:02,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:02,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:02,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:02,054 INFO L87 Difference]: Start difference. First operand 2863 states and 11840 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:02,850 INFO L93 Difference]: Finished difference Result 3681 states and 15040 transitions. [2021-06-05 15:03:02,850 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:02,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:02,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:02,857 INFO L225 Difference]: With dead ends: 3681 [2021-06-05 15:03:02,857 INFO L226 Difference]: Without dead ends: 3651 [2021-06-05 15:03:02,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 553.0ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:02,861 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3651 states. [2021-06-05 15:03:02,894 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3651 to 2898. [2021-06-05 15:03:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2898 states, 2897 states have (on average 4.137038315498792) internal successors, (11985), 2897 states have internal predecessors, (11985), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2898 states to 2898 states and 11985 transitions. [2021-06-05 15:03:02,902 INFO L78 Accepts]: Start accepts. Automaton has 2898 states and 11985 transitions. Word has length 23 [2021-06-05 15:03:02,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:02,903 INFO L482 AbstractCegarLoop]: Abstraction has 2898 states and 11985 transitions. [2021-06-05 15:03:02,903 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:02,903 INFO L276 IsEmpty]: Start isEmpty. Operand 2898 states and 11985 transitions. [2021-06-05 15:03:02,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:02,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:02,907 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:03,120 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-06-05 15:03:03,121 INFO L430 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:03,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:03,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1544027143, now seen corresponding path program 17 times [2021-06-05 15:03:03,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:03,121 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [488512138] [2021-06-05 15:03:03,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:03,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:03,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,226 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [488512138] [2021-06-05 15:03:03,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [488512138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,226 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2090486556] [2021-06-05 15:03:03,226 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:03:03,255 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:03:03,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:03,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:03,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:03,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:03,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:03:03,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:03,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:03,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:03,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 15:03:03,455 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:03,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2090486556] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:03,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:03,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:03,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434034343] [2021-06-05 15:03:03,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:03,456 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:03,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:03,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:03,456 INFO L87 Difference]: Start difference. First operand 2898 states and 11985 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:04,041 INFO L93 Difference]: Finished difference Result 3457 states and 14154 transitions. [2021-06-05 15:03:04,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:04,041 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:04,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:04,048 INFO L225 Difference]: With dead ends: 3457 [2021-06-05 15:03:04,048 INFO L226 Difference]: Without dead ends: 3431 [2021-06-05 15:03:04,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 426.5ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:04,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3431 states. [2021-06-05 15:03:04,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3431 to 2902. [2021-06-05 15:03:04,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2902 states, 2901 states have (on average 4.136849362288866) internal successors, (12001), 2901 states have internal predecessors, (12001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2902 states to 2902 states and 12001 transitions. [2021-06-05 15:03:04,092 INFO L78 Accepts]: Start accepts. Automaton has 2902 states and 12001 transitions. Word has length 23 [2021-06-05 15:03:04,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:04,092 INFO L482 AbstractCegarLoop]: Abstraction has 2902 states and 12001 transitions. [2021-06-05 15:03:04,092 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:04,093 INFO L276 IsEmpty]: Start isEmpty. Operand 2902 states and 12001 transitions. [2021-06-05 15:03:04,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:04,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:04,098 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:04,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2021-06-05 15:03:04,313 INFO L430 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:04,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:04,313 INFO L82 PathProgramCache]: Analyzing trace with hash -1137373419, now seen corresponding path program 18 times [2021-06-05 15:03:04,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:04,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244121404] [2021-06-05 15:03:04,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:04,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:04,429 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:04,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244121404] [2021-06-05 15:03:04,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1244121404] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390380278] [2021-06-05 15:03:04,429 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:04,455 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:04,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:04,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:04,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:04,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:04,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:04,532 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:04,540 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:04,540 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:04,540 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:04,623 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:04,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390380278] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:04,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:04,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:04,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [59406203] [2021-06-05 15:03:04,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:04,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:04,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:04,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:04,624 INFO L87 Difference]: Start difference. First operand 2902 states and 12001 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:05,337 INFO L93 Difference]: Finished difference Result 3466 states and 14203 transitions. [2021-06-05 15:03:05,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:05,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:05,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:05,343 INFO L225 Difference]: With dead ends: 3466 [2021-06-05 15:03:05,343 INFO L226 Difference]: Without dead ends: 3445 [2021-06-05 15:03:05,344 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 607.1ms TimeCoverageRelationStatistics Valid=197, Invalid=859, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:05,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3445 states. [2021-06-05 15:03:05,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3445 to 2908. [2021-06-05 15:03:05,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2908 states, 2907 states have (on average 4.13656690746474) internal successors, (12025), 2907 states have internal predecessors, (12025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2908 states to 2908 states and 12025 transitions. [2021-06-05 15:03:05,383 INFO L78 Accepts]: Start accepts. Automaton has 2908 states and 12025 transitions. Word has length 23 [2021-06-05 15:03:05,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:05,383 INFO L482 AbstractCegarLoop]: Abstraction has 2908 states and 12025 transitions. [2021-06-05 15:03:05,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:05,384 INFO L276 IsEmpty]: Start isEmpty. Operand 2908 states and 12025 transitions. [2021-06-05 15:03:05,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:05,388 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:05,388 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:05,588 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,589 INFO L430 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:05,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:05,589 INFO L82 PathProgramCache]: Analyzing trace with hash -2112317581, now seen corresponding path program 19 times [2021-06-05 15:03:05,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:05,589 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [494723875] [2021-06-05 15:03:05,589 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:05,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,723 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:05,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [494723875] [2021-06-05 15:03:05,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [494723875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,724 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1795050925] [2021-06-05 15:03:05,724 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:05,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:05,750 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:05,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:05,871 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:05,871 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:05,873 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,882 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:05,883 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:05,883 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:05,957 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:05,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1795050925] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:05,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:05,958 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:05,958 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [598651217] [2021-06-05 15:03:05,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:05,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:05,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:05,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:05,958 INFO L87 Difference]: Start difference. First operand 2908 states and 12025 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:06,614 INFO L93 Difference]: Finished difference Result 3319 states and 13629 transitions. [2021-06-05 15:03:06,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:06,614 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:06,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:06,619 INFO L225 Difference]: With dead ends: 3319 [2021-06-05 15:03:06,619 INFO L226 Difference]: Without dead ends: 3296 [2021-06-05 15:03:06,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 500.3ms TimeCoverageRelationStatistics Valid=136, Invalid=676, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:06,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3296 states. [2021-06-05 15:03:06,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3296 to 2915. [2021-06-05 15:03:06,666 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2915 states, 2914 states have (on average 4.136238846945779) internal successors, (12053), 2914 states have internal predecessors, (12053), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2915 states to 2915 states and 12053 transitions. [2021-06-05 15:03:06,674 INFO L78 Accepts]: Start accepts. Automaton has 2915 states and 12053 transitions. Word has length 23 [2021-06-05 15:03:06,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:06,674 INFO L482 AbstractCegarLoop]: Abstraction has 2915 states and 12053 transitions. [2021-06-05 15:03:06,674 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:06,674 INFO L276 IsEmpty]: Start isEmpty. Operand 2915 states and 12053 transitions. [2021-06-05 15:03:06,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:06,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:06,679 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:06,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,40 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:06,879 INFO L430 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:06,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:06,880 INFO L82 PathProgramCache]: Analyzing trace with hash 71296115, now seen corresponding path program 20 times [2021-06-05 15:03:06,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:06,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434342104] [2021-06-05 15:03:06,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:06,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:07,041 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:07,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434342104] [2021-06-05 15:03:07,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1434342104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190633076] [2021-06-05 15:03:07,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:07,068 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:07,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:07,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:07,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:07,161 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,161 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:07,162 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:07,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:07,170 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:07,170 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:07,247 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:07,247 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190633076] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:07,247 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:07,247 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:07,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572324095] [2021-06-05 15:03:07,247 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:07,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:07,248 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:07,248 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:07,248 INFO L87 Difference]: Start difference. First operand 2915 states and 12053 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:07,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:07,973 INFO L93 Difference]: Finished difference Result 3498 states and 14351 transitions. [2021-06-05 15:03:07,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:07,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:07,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:07,979 INFO L225 Difference]: With dead ends: 3498 [2021-06-05 15:03:07,980 INFO L226 Difference]: Without dead ends: 3476 [2021-06-05 15:03:07,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 593.2ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:07,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3476 states. [2021-06-05 15:03:08,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3476 to 2931. [2021-06-05 15:03:08,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 4.138225255972697) internal successors, (12125), 2930 states have internal predecessors, (12125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:08,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 12125 transitions. [2021-06-05 15:03:08,018 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 12125 transitions. Word has length 23 [2021-06-05 15:03:08,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:08,019 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 12125 transitions. [2021-06-05 15:03:08,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:08,019 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 12125 transitions. [2021-06-05 15:03:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:08,023 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:08,023 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:08,223 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:08,224 INFO L430 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:08,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:08,225 INFO L82 PathProgramCache]: Analyzing trace with hash 656630067, now seen corresponding path program 21 times [2021-06-05 15:03:08,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:08,225 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969688964] [2021-06-05 15:03:08,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:08,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:08,389 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:08,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969688964] [2021-06-05 15:03:08,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969688964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:08,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438496119] [2021-06-05 15:03:08,390 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:08,418 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:08,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:08,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:08,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:08,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:08,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:08,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:08,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:08,504 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:08,504 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:08,591 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:08,591 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438496119] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:08,591 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:08,591 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:08,591 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23167056] [2021-06-05 15:03:08,591 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:08,591 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:08,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:08,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:08,592 INFO L87 Difference]: Start difference. First operand 2931 states and 12125 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:09,341 INFO L93 Difference]: Finished difference Result 3353 states and 13762 transitions. [2021-06-05 15:03:09,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:09,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:09,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:09,347 INFO L225 Difference]: With dead ends: 3353 [2021-06-05 15:03:09,347 INFO L226 Difference]: Without dead ends: 3327 [2021-06-05 15:03:09,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 711.2ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:09,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3327 states. [2021-06-05 15:03:09,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3327 to 2935. [2021-06-05 15:03:09,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 4.138036809815951) internal successors, (12141), 2934 states have internal predecessors, (12141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 12141 transitions. [2021-06-05 15:03:09,386 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 12141 transitions. Word has length 23 [2021-06-05 15:03:09,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:09,386 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 12141 transitions. [2021-06-05 15:03:09,386 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:09,386 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 12141 transitions. [2021-06-05 15:03:09,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:09,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:09,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:09,592 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2021-06-05 15:03:09,592 INFO L430 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:09,592 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:09,592 INFO L82 PathProgramCache]: Analyzing trace with hash -2024770495, now seen corresponding path program 22 times [2021-06-05 15:03:09,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:09,592 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183336853] [2021-06-05 15:03:09,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:09,595 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:09,742 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:09,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:09,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183336853] [2021-06-05 15:03:09,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183336853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439597581] [2021-06-05 15:03:09,742 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:09,768 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:09,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:09,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:09,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:09,858 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:09,858 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:09,859 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:09,867 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:09,867 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:09,868 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:09,984 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:09,985 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439597581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:09,985 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:09,985 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:09,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509416122] [2021-06-05 15:03:09,985 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:09,985 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:09,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:09,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:09,985 INFO L87 Difference]: Start difference. First operand 2935 states and 12141 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:10,687 INFO L93 Difference]: Finished difference Result 3378 states and 13868 transitions. [2021-06-05 15:03:10,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:10,688 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:10,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:10,694 INFO L225 Difference]: With dead ends: 3378 [2021-06-05 15:03:10,694 INFO L226 Difference]: Without dead ends: 3357 [2021-06-05 15:03:10,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 691.5ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:10,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3357 states. [2021-06-05 15:03:10,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3357 to 2927. [2021-06-05 15:03:10,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2927 states, 2926 states have (on average 4.137730690362269) internal successors, (12107), 2926 states have internal predecessors, (12107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2927 states to 2927 states and 12107 transitions. [2021-06-05 15:03:10,731 INFO L78 Accepts]: Start accepts. Automaton has 2927 states and 12107 transitions. Word has length 23 [2021-06-05 15:03:10,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:10,731 INFO L482 AbstractCegarLoop]: Abstraction has 2927 states and 12107 transitions. [2021-06-05 15:03:10,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:10,731 INFO L276 IsEmpty]: Start isEmpty. Operand 2927 states and 12107 transitions. [2021-06-05 15:03:10,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:10,735 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:10,735 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:10,936 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:10,936 INFO L430 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:10,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:10,936 INFO L82 PathProgramCache]: Analyzing trace with hash 420793493, now seen corresponding path program 23 times [2021-06-05 15:03:10,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:10,936 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415605748] [2021-06-05 15:03:10,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:10,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:11,033 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:11,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:11,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415605748] [2021-06-05 15:03:11,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415605748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:11,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80598449] [2021-06-05 15:03:11,033 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:11,058 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:11,058 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:11,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:11,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:11,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:11,155 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:11,156 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:11,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:11,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:11,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:11,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80598449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:11,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:11,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:11,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1466363747] [2021-06-05 15:03:11,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:11,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:11,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:11,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:11,226 INFO L87 Difference]: Start difference. First operand 2927 states and 12107 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:12,001 INFO L93 Difference]: Finished difference Result 3749 states and 15336 transitions. [2021-06-05 15:03:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:12,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:12,008 INFO L225 Difference]: With dead ends: 3749 [2021-06-05 15:03:12,008 INFO L226 Difference]: Without dead ends: 3719 [2021-06-05 15:03:12,008 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 584.7ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:12,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3719 states. [2021-06-05 15:03:12,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3719 to 2931. [2021-06-05 15:03:12,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2931 states, 2930 states have (on average 4.138225255972697) internal successors, (12125), 2930 states have internal predecessors, (12125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2931 states to 2931 states and 12125 transitions. [2021-06-05 15:03:12,051 INFO L78 Accepts]: Start accepts. Automaton has 2931 states and 12125 transitions. Word has length 23 [2021-06-05 15:03:12,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:12,051 INFO L482 AbstractCegarLoop]: Abstraction has 2931 states and 12125 transitions. [2021-06-05 15:03:12,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:12,051 INFO L276 IsEmpty]: Start isEmpty. Operand 2931 states and 12125 transitions. [2021-06-05 15:03:12,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:12,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:12,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:12,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,256 INFO L430 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:12,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:12,256 INFO L82 PathProgramCache]: Analyzing trace with hash 502192549, now seen corresponding path program 24 times [2021-06-05 15:03:12,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:12,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1092657808] [2021-06-05 15:03:12,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:12,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:12,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,364 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:12,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1092657808] [2021-06-05 15:03:12,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1092657808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,364 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602095085] [2021-06-05 15:03:12,365 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:12,391 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:12,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:12,392 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:12,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:12,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:12,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:12,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:12,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:12,474 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:12,554 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:12,554 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602095085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:12,554 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:12,554 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:12,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461028216] [2021-06-05 15:03:12,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:12,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:12,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:12,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:12,555 INFO L87 Difference]: Start difference. First operand 2931 states and 12125 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,385 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:13,385 INFO L93 Difference]: Finished difference Result 3507 states and 14375 transitions. [2021-06-05 15:03:13,385 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:03:13,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:13,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:13,392 INFO L225 Difference]: With dead ends: 3507 [2021-06-05 15:03:13,392 INFO L226 Difference]: Without dead ends: 3481 [2021-06-05 15:03:13,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 694.2ms TimeCoverageRelationStatistics Valid=260, Invalid=1000, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:13,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3481 states. [2021-06-05 15:03:13,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3481 to 2935. [2021-06-05 15:03:13,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2935 states, 2934 states have (on average 4.138036809815951) internal successors, (12141), 2934 states have internal predecessors, (12141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2935 states to 2935 states and 12141 transitions. [2021-06-05 15:03:13,443 INFO L78 Accepts]: Start accepts. Automaton has 2935 states and 12141 transitions. Word has length 23 [2021-06-05 15:03:13,443 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:13,443 INFO L482 AbstractCegarLoop]: Abstraction has 2935 states and 12141 transitions. [2021-06-05 15:03:13,443 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:13,443 INFO L276 IsEmpty]: Start isEmpty. Operand 2935 states and 12141 transitions. [2021-06-05 15:03:13,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:13,447 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:13,447 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:13,648 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2021-06-05 15:03:13,648 INFO L430 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:13,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:13,648 INFO L82 PathProgramCache]: Analyzing trace with hash 2115759283, now seen corresponding path program 25 times [2021-06-05 15:03:13,648 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:13,648 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047886287] [2021-06-05 15:03:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:13,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:13,745 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,745 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:13,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047886287] [2021-06-05 15:03:13,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047886287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,745 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348218402] [2021-06-05 15:03:13,745 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:13,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:13,771 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:13,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:13,843 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,843 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:13,844 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:13,852 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:13,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:13,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:13,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348218402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:13,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:13,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:13,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654699686] [2021-06-05 15:03:13,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:13,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:13,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:13,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:13,931 INFO L87 Difference]: Start difference. First operand 2935 states and 12141 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:14,586 INFO L93 Difference]: Finished difference Result 3535 states and 14493 transitions. [2021-06-05 15:03:14,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:14,587 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:14,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:14,593 INFO L225 Difference]: With dead ends: 3535 [2021-06-05 15:03:14,593 INFO L226 Difference]: Without dead ends: 3514 [2021-06-05 15:03:14,593 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 596.8ms TimeCoverageRelationStatistics Valid=215, Invalid=841, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:14,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3514 states. [2021-06-05 15:03:14,623 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3514 to 2923. [2021-06-05 15:03:14,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2923 states, 2922 states have (on average 4.136550308008213) internal successors, (12087), 2922 states have internal predecessors, (12087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2923 states to 2923 states and 12087 transitions. [2021-06-05 15:03:14,632 INFO L78 Accepts]: Start accepts. Automaton has 2923 states and 12087 transitions. Word has length 23 [2021-06-05 15:03:14,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:14,632 INFO L482 AbstractCegarLoop]: Abstraction has 2923 states and 12087 transitions. [2021-06-05 15:03:14,632 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:14,632 INFO L276 IsEmpty]: Start isEmpty. Operand 2923 states and 12087 transitions. [2021-06-05 15:03:14,636 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:14,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:14,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:14,842 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:14,843 INFO L430 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:14,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:14,843 INFO L82 PathProgramCache]: Analyzing trace with hash 196245939, now seen corresponding path program 26 times [2021-06-05 15:03:14,843 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:14,843 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630005852] [2021-06-05 15:03:14,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:14,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:14,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:14,934 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:14,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630005852] [2021-06-05 15:03:14,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630005852] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:14,934 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [985080277] [2021-06-05 15:03:14,935 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:14,977 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:14,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:14,977 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:14,978 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:15,108 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:15,108 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:15,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:15,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:15,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:15,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:15,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [985080277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:15,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:15,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961905773] [2021-06-05 15:03:15,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:15,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:15,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:15,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:15,184 INFO L87 Difference]: Start difference. First operand 2923 states and 12087 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:15,632 INFO L93 Difference]: Finished difference Result 3352 states and 13763 transitions. [2021-06-05 15:03:15,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:03:15,632 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:15,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:15,638 INFO L225 Difference]: With dead ends: 3352 [2021-06-05 15:03:15,638 INFO L226 Difference]: Without dead ends: 3318 [2021-06-05 15:03:15,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 377.6ms TimeCoverageRelationStatistics Valid=132, Invalid=624, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:03:15,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3318 states. [2021-06-05 15:03:15,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3318 to 2938. [2021-06-05 15:03:15,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 4.135512427647259) internal successors, (12146), 2937 states have internal predecessors, (12146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 12146 transitions. [2021-06-05 15:03:15,678 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 12146 transitions. Word has length 23 [2021-06-05 15:03:15,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:15,679 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 12146 transitions. [2021-06-05 15:03:15,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:15,679 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 12146 transitions. [2021-06-05 15:03:15,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:15,683 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:15,683 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:15,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-06-05 15:03:15,897 INFO L430 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:15,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:15,897 INFO L82 PathProgramCache]: Analyzing trace with hash 350683457, now seen corresponding path program 27 times [2021-06-05 15:03:15,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:15,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451250451] [2021-06-05 15:03:15,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:15,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:15,998 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:15,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:15,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451250451] [2021-06-05 15:03:15,999 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451250451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:15,999 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946749860] [2021-06-05 15:03:15,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:16,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:16,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:16,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:16,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:16,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,116 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:16,117 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:16,125 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:16,125 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:16,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:16,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946749860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:16,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:16,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:16,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377723749] [2021-06-05 15:03:16,186 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:16,186 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:16,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:16,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:16,186 INFO L87 Difference]: Start difference. First operand 2938 states and 12146 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,736 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:16,736 INFO L93 Difference]: Finished difference Result 3551 states and 14551 transitions. [2021-06-05 15:03:16,736 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:16,737 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:16,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:16,743 INFO L225 Difference]: With dead ends: 3551 [2021-06-05 15:03:16,743 INFO L226 Difference]: Without dead ends: 3521 [2021-06-05 15:03:16,743 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 463.3ms TimeCoverageRelationStatistics Valid=167, Invalid=825, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:16,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3521 states. [2021-06-05 15:03:16,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3521 to 2942. [2021-06-05 15:03:16,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2942 states, 2941 states have (on average 4.136008160489629) internal successors, (12164), 2941 states have internal predecessors, (12164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2942 states to 2942 states and 12164 transitions. [2021-06-05 15:03:16,803 INFO L78 Accepts]: Start accepts. Automaton has 2942 states and 12164 transitions. Word has length 23 [2021-06-05 15:03:16,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:16,803 INFO L482 AbstractCegarLoop]: Abstraction has 2942 states and 12164 transitions. [2021-06-05 15:03:16,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:16,803 INFO L276 IsEmpty]: Start isEmpty. Operand 2942 states and 12164 transitions. [2021-06-05 15:03:16,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:16,807 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:16,807 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:17,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:17,021 INFO L430 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:17,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:17,021 INFO L82 PathProgramCache]: Analyzing trace with hash 432082513, now seen corresponding path program 28 times [2021-06-05 15:03:17,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:17,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299904921] [2021-06-05 15:03:17,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:17,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:17,128 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:17,128 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299904921] [2021-06-05 15:03:17,128 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [299904921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,128 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809651374] [2021-06-05 15:03:17,128 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:17,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:17,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:17,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:17,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:17,244 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:17,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:17,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:17,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:17,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:17,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:17,357 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:17,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809651374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:17,357 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:17,357 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:17,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843275080] [2021-06-05 15:03:17,357 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:17,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:17,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:17,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:17,358 INFO L87 Difference]: Start difference. First operand 2942 states and 12164 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:18,051 INFO L93 Difference]: Finished difference Result 3393 states and 13921 transitions. [2021-06-05 15:03:18,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:18,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:18,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:18,057 INFO L225 Difference]: With dead ends: 3393 [2021-06-05 15:03:18,057 INFO L226 Difference]: Without dead ends: 3367 [2021-06-05 15:03:18,058 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 644.5ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:18,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3367 states. [2021-06-05 15:03:18,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3367 to 2946. [2021-06-05 15:03:18,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 4.135823429541596) internal successors, (12180), 2945 states have internal predecessors, (12180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 12180 transitions. [2021-06-05 15:03:18,099 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 12180 transitions. Word has length 23 [2021-06-05 15:03:18,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:18,099 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 12180 transitions. [2021-06-05 15:03:18,099 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:18,099 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 12180 transitions. [2021-06-05 15:03:18,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:18,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:18,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:18,312 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:18,313 INFO L430 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:18,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:18,313 INFO L82 PathProgramCache]: Analyzing trace with hash 2045649247, now seen corresponding path program 29 times [2021-06-05 15:03:18,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:18,313 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894378339] [2021-06-05 15:03:18,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:18,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:18,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:18,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894378339] [2021-06-05 15:03:18,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1894378339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075563416] [2021-06-05 15:03:18,416 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:18,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:18,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:18,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:18,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:18,530 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,530 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:18,531 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:18,541 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:18,542 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:18,542 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:18,629 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:18,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075563416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:18,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:18,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:18,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [981932351] [2021-06-05 15:03:18,630 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:18,630 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:18,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:18,630 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:18,630 INFO L87 Difference]: Start difference. First operand 2946 states and 12180 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:19,362 INFO L93 Difference]: Finished difference Result 3441 states and 14118 transitions. [2021-06-05 15:03:19,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:19,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:19,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:19,368 INFO L225 Difference]: With dead ends: 3441 [2021-06-05 15:03:19,368 INFO L226 Difference]: Without dead ends: 3420 [2021-06-05 15:03:19,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 654.9ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:19,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3420 states. [2021-06-05 15:03:19,397 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3420 to 2938. [2021-06-05 15:03:19,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2938 states, 2937 states have (on average 4.135512427647259) internal successors, (12146), 2937 states have internal predecessors, (12146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2938 states to 2938 states and 12146 transitions. [2021-06-05 15:03:19,406 INFO L78 Accepts]: Start accepts. Automaton has 2938 states and 12146 transitions. Word has length 23 [2021-06-05 15:03:19,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:19,406 INFO L482 AbstractCegarLoop]: Abstraction has 2938 states and 12146 transitions. [2021-06-05 15:03:19,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:19,406 INFO L276 IsEmpty]: Start isEmpty. Operand 2938 states and 12146 transitions. [2021-06-05 15:03:19,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:19,410 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:19,410 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:19,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,50 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:19,610 INFO L430 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:19,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:19,611 INFO L82 PathProgramCache]: Analyzing trace with hash -1838104447, now seen corresponding path program 30 times [2021-06-05 15:03:19,611 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:19,611 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264733632] [2021-06-05 15:03:19,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:19,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:19,748 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264733632] [2021-06-05 15:03:19,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264733632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2105578353] [2021-06-05 15:03:19,748 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:19,773 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:19,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:19,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:19,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:19,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:19,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:19,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:19,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:19,946 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2105578353] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:19,946 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:19,946 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:19,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294164431] [2021-06-05 15:03:19,947 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:19,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:19,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:19,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:19,947 INFO L87 Difference]: Start difference. First operand 2938 states and 12146 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:20,610 INFO L93 Difference]: Finished difference Result 3491 states and 14324 transitions. [2021-06-05 15:03:20,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:20,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:20,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:20,617 INFO L225 Difference]: With dead ends: 3491 [2021-06-05 15:03:20,617 INFO L226 Difference]: Without dead ends: 3469 [2021-06-05 15:03:20,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 572.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:20,620 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3469 states. [2021-06-05 15:03:20,663 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3469 to 2950. [2021-06-05 15:03:20,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2950 states, 2949 states have (on average 4.137673787724652) internal successors, (12202), 2949 states have internal predecessors, (12202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2950 states to 2950 states and 12202 transitions. [2021-06-05 15:03:20,671 INFO L78 Accepts]: Start accepts. Automaton has 2950 states and 12202 transitions. Word has length 23 [2021-06-05 15:03:20,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:20,671 INFO L482 AbstractCegarLoop]: Abstraction has 2950 states and 12202 transitions. [2021-06-05 15:03:20,672 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:20,672 INFO L276 IsEmpty]: Start isEmpty. Operand 2950 states and 12202 transitions. [2021-06-05 15:03:20,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:20,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:20,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:20,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:20,876 INFO L430 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:20,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:20,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1252770495, now seen corresponding path program 31 times [2021-06-05 15:03:20,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:20,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449686419] [2021-06-05 15:03:20,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:20,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:21,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449686419] [2021-06-05 15:03:21,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449686419] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89096590] [2021-06-05 15:03:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:21,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:21,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:21,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:21,125 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:21,126 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:21,127 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:21,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:21,135 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:21,135 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:21,217 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:21,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89096590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:21,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:21,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:21,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718290053] [2021-06-05 15:03:21,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:21,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:21,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:21,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:21,218 INFO L87 Difference]: Start difference. First operand 2950 states and 12202 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,092 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:22,092 INFO L93 Difference]: Finished difference Result 3443 states and 14121 transitions. [2021-06-05 15:03:22,092 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:03:22,092 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:22,092 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:22,098 INFO L225 Difference]: With dead ends: 3443 [2021-06-05 15:03:22,098 INFO L226 Difference]: Without dead ends: 3417 [2021-06-05 15:03:22,098 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 716.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:22,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3417 states. [2021-06-05 15:03:22,128 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3417 to 2954. [2021-06-05 15:03:22,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 4.13748730104978) internal successors, (12218), 2953 states have internal predecessors, (12218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 12218 transitions. [2021-06-05 15:03:22,137 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 12218 transitions. Word has length 23 [2021-06-05 15:03:22,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:22,137 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 12218 transitions. [2021-06-05 15:03:22,137 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:22,137 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 12218 transitions. [2021-06-05 15:03:22,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:22,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:22,141 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:22,341 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2021-06-05 15:03:22,341 INFO L430 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:22,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:22,341 INFO L82 PathProgramCache]: Analyzing trace with hash 360796239, now seen corresponding path program 32 times [2021-06-05 15:03:22,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:22,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028139401] [2021-06-05 15:03:22,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:22,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:22,489 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:22,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028139401] [2021-06-05 15:03:22,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028139401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856923171] [2021-06-05 15:03:22,490 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:22,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:22,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:22,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:22,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:22,594 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:22,594 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:22,595 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:22,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:22,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:22,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:22,703 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:22,703 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856923171] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:22,703 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:22,703 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:22,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363355330] [2021-06-05 15:03:22,704 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:22,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:22,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:22,704 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:22,704 INFO L87 Difference]: Start difference. First operand 2954 states and 12218 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:23,479 INFO L93 Difference]: Finished difference Result 3363 states and 13809 transitions. [2021-06-05 15:03:23,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:23,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:23,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:23,485 INFO L225 Difference]: With dead ends: 3363 [2021-06-05 15:03:23,486 INFO L226 Difference]: Without dead ends: 3342 [2021-06-05 15:03:23,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 671.5ms TimeCoverageRelationStatistics Valid=186, Invalid=684, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:23,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3342 states. [2021-06-05 15:03:23,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3342 to 2946. [2021-06-05 15:03:23,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2946 states, 2945 states have (on average 4.137181663837012) internal successors, (12184), 2945 states have internal predecessors, (12184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2946 states to 2946 states and 12184 transitions. [2021-06-05 15:03:23,524 INFO L78 Accepts]: Start accepts. Automaton has 2946 states and 12184 transitions. Word has length 23 [2021-06-05 15:03:23,524 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:23,524 INFO L482 AbstractCegarLoop]: Abstraction has 2946 states and 12184 transitions. [2021-06-05 15:03:23,524 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:23,524 INFO L276 IsEmpty]: Start isEmpty. Operand 2946 states and 12184 transitions. [2021-06-05 15:03:23,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:23,528 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:23,528 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:23,728 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2021-06-05 15:03:23,728 INFO L430 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:23,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:23,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1488607069, now seen corresponding path program 33 times [2021-06-05 15:03:23,729 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:23,729 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488210221] [2021-06-05 15:03:23,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:23,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:23,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:23,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488210221] [2021-06-05 15:03:23,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488210221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:23,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2093365192] [2021-06-05 15:03:23,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:23,857 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:23,857 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:23,858 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:23,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:23,996 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:03:23,996 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:03:24,001 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:24,019 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:03:24,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:24,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:03:24,057 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:24,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2093365192] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:24,057 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:24,057 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:03:24,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [194985206] [2021-06-05 15:03:24,057 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:24,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:24,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:24,057 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:24,057 INFO L87 Difference]: Start difference. First operand 2946 states and 12184 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:24,805 INFO L93 Difference]: Finished difference Result 3873 states and 15835 transitions. [2021-06-05 15:03:24,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:03:24,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:24,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:24,812 INFO L225 Difference]: With dead ends: 3873 [2021-06-05 15:03:24,812 INFO L226 Difference]: Without dead ends: 3832 [2021-06-05 15:03:24,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 313 ImplicationChecksByTransitivity, 514.6ms TimeCoverageRelationStatistics Valid=197, Invalid=1363, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:03:24,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3832 states. [2021-06-05 15:03:24,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3832 to 2966. [2021-06-05 15:03:24,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 4.143338954468803) internal successors, (12285), 2965 states have internal predecessors, (12285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 12285 transitions. [2021-06-05 15:03:24,855 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 12285 transitions. Word has length 23 [2021-06-05 15:03:24,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:24,855 INFO L482 AbstractCegarLoop]: Abstraction has 2966 states and 12285 transitions. [2021-06-05 15:03:24,855 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:24,855 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 12285 transitions. [2021-06-05 15:03:24,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:24,859 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:24,860 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:25,060 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,54 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:25,060 INFO L430 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:25,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:25,060 INFO L82 PathProgramCache]: Analyzing trace with hash -1407208013, now seen corresponding path program 34 times [2021-06-05 15:03:25,060 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:25,060 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715540350] [2021-06-05 15:03:25,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:25,063 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:25,158 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:25,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715540350] [2021-06-05 15:03:25,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [715540350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1377216043] [2021-06-05 15:03:25,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:25,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:25,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:25,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:25,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:25,268 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:25,268 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:25,269 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:25,277 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:25,277 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:25,277 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:25,355 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:25,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1377216043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:25,356 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:25,356 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:25,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54953933] [2021-06-05 15:03:25,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:25,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:25,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:25,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:25,356 INFO L87 Difference]: Start difference. First operand 2966 states and 12285 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:26,149 INFO L93 Difference]: Finished difference Result 3569 states and 14643 transitions. [2021-06-05 15:03:26,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:03:26,149 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:26,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:26,155 INFO L225 Difference]: With dead ends: 3569 [2021-06-05 15:03:26,155 INFO L226 Difference]: Without dead ends: 3543 [2021-06-05 15:03:26,155 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 714.0ms TimeCoverageRelationStatistics Valid=261, Invalid=999, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:03:26,159 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3543 states. [2021-06-05 15:03:26,188 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3543 to 2970. [2021-06-05 15:03:26,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.143145840350286) internal successors, (12301), 2969 states have internal predecessors, (12301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12301 transitions. [2021-06-05 15:03:26,197 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12301 transitions. Word has length 23 [2021-06-05 15:03:26,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:26,197 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 12301 transitions. [2021-06-05 15:03:26,197 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:26,197 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12301 transitions. [2021-06-05 15:03:26,201 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:26,201 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:26,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:26,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:26,402 INFO L430 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:26,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:26,402 INFO L82 PathProgramCache]: Analyzing trace with hash 206358721, now seen corresponding path program 35 times [2021-06-05 15:03:26,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:26,402 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099367281] [2021-06-05 15:03:26,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:26,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:26,544 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:26,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099367281] [2021-06-05 15:03:26,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099367281] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748538673] [2021-06-05 15:03:26,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:26,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:26,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:26,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:26,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:26,645 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,645 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:26,646 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:26,654 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:26,655 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:26,655 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:26,731 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748538673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:26,731 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:26,731 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:26,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120438614] [2021-06-05 15:03:26,732 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:26,733 INFO L87 Difference]: Start difference. First operand 2970 states and 12301 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:27,432 INFO L93 Difference]: Finished difference Result 3478 states and 14281 transitions. [2021-06-05 15:03:27,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:27,432 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:27,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:27,438 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 15:03:27,438 INFO L226 Difference]: Without dead ends: 3457 [2021-06-05 15:03:27,438 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 633.1ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:03:27,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3457 states. [2021-06-05 15:03:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3457 to 2958. [2021-06-05 15:03:27,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2958 states, 2957 states have (on average 4.14169766655394) internal successors, (12247), 2957 states have internal predecessors, (12247), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2958 states to 2958 states and 12247 transitions. [2021-06-05 15:03:27,482 INFO L78 Accepts]: Start accepts. Automaton has 2958 states and 12247 transitions. Word has length 23 [2021-06-05 15:03:27,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:27,482 INFO L482 AbstractCegarLoop]: Abstraction has 2958 states and 12247 transitions. [2021-06-05 15:03:27,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:27,482 INFO L276 IsEmpty]: Start isEmpty. Operand 2958 states and 12247 transitions. [2021-06-05 15:03:27,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:27,486 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:27,486 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:27,686 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:27,687 INFO L430 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:27,687 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:27,687 INFO L82 PathProgramCache]: Analyzing trace with hash -923022959, now seen corresponding path program 36 times [2021-06-05 15:03:27,687 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:27,687 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037011755] [2021-06-05 15:03:27,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:27,824 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:27,824 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:27,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037011755] [2021-06-05 15:03:27,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037011755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:27,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2072601005] [2021-06-05 15:03:27,825 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:27,849 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:03:27,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:27,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:27,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:27,965 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:27,965 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:27,970 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:27,978 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:27,979 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:27,979 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:28,044 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:28,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2072601005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:28,044 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:28,044 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:28,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612941839] [2021-06-05 15:03:28,044 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:28,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:28,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:28,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:28,045 INFO L87 Difference]: Start difference. First operand 2958 states and 12247 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:28,665 INFO L93 Difference]: Finished difference Result 3433 states and 14112 transitions. [2021-06-05 15:03:28,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:28,666 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:28,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:28,672 INFO L225 Difference]: With dead ends: 3433 [2021-06-05 15:03:28,672 INFO L226 Difference]: Without dead ends: 3411 [2021-06-05 15:03:28,673 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 516.3ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:28,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3411 states. [2021-06-05 15:03:28,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3411 to 2966. [2021-06-05 15:03:28,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2966 states, 2965 states have (on average 4.141989881956155) internal successors, (12281), 2965 states have internal predecessors, (12281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2966 states to 2966 states and 12281 transitions. [2021-06-05 15:03:28,723 INFO L78 Accepts]: Start accepts. Automaton has 2966 states and 12281 transitions. Word has length 23 [2021-06-05 15:03:28,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:28,723 INFO L482 AbstractCegarLoop]: Abstraction has 2966 states and 12281 transitions. [2021-06-05 15:03:28,723 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:28,723 INFO L276 IsEmpty]: Start isEmpty. Operand 2966 states and 12281 transitions. [2021-06-05 15:03:28,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:28,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:28,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:28,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2021-06-05 15:03:28,928 INFO L430 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:28,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:28,928 INFO L82 PathProgramCache]: Analyzing trace with hash -337689007, now seen corresponding path program 37 times [2021-06-05 15:03:28,928 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:28,928 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [954447277] [2021-06-05 15:03:28,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:28,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:29,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:29,076 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [954447277] [2021-06-05 15:03:29,076 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [954447277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:29,076 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1771836463] [2021-06-05 15:03:29,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:29,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:29,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:29,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:29,193 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:29,201 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:29,202 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:29,202 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:29,287 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:29,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1771836463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:29,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:29,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:29,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993375633] [2021-06-05 15:03:29,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:29,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:29,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:29,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:29,288 INFO L87 Difference]: Start difference. First operand 2966 states and 12281 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:29,938 INFO L93 Difference]: Finished difference Result 3412 states and 14013 transitions. [2021-06-05 15:03:29,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:29,939 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:29,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:29,944 INFO L225 Difference]: With dead ends: 3412 [2021-06-05 15:03:29,944 INFO L226 Difference]: Without dead ends: 3386 [2021-06-05 15:03:29,944 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 652.9ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:29,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3386 states. [2021-06-05 15:03:29,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3386 to 2970. [2021-06-05 15:03:29,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2970 states, 2969 states have (on average 4.141798585382284) internal successors, (12297), 2969 states have internal predecessors, (12297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2970 states to 2970 states and 12297 transitions. [2021-06-05 15:03:29,983 INFO L78 Accepts]: Start accepts. Automaton has 2970 states and 12297 transitions. Word has length 23 [2021-06-05 15:03:29,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:29,984 INFO L482 AbstractCegarLoop]: Abstraction has 2970 states and 12297 transitions. [2021-06-05 15:03:29,984 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:29,984 INFO L276 IsEmpty]: Start isEmpty. Operand 2970 states and 12297 transitions. [2021-06-05 15:03:29,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:29,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:29,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:30,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:30,201 INFO L430 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:30,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:30,201 INFO L82 PathProgramCache]: Analyzing trace with hash 1275877727, now seen corresponding path program 38 times [2021-06-05 15:03:30,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:30,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120966368] [2021-06-05 15:03:30,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:30,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:30,334 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:30,334 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:30,334 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120966368] [2021-06-05 15:03:30,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120966368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,335 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1690941573] [2021-06-05 15:03:30,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:30,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:30,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:30,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:30,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:30,444 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:30,444 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:30,445 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,453 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:30,454 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:30,454 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:30,550 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:30,550 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1690941573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:30,550 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:30,550 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:30,550 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846577485] [2021-06-05 15:03:30,550 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:30,550 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:30,551 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:30,551 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:30,551 INFO L87 Difference]: Start difference. First operand 2970 states and 12297 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:31,159 INFO L93 Difference]: Finished difference Result 3324 states and 13674 transitions. [2021-06-05 15:03:31,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:31,159 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:31,159 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:31,165 INFO L225 Difference]: With dead ends: 3324 [2021-06-05 15:03:31,165 INFO L226 Difference]: Without dead ends: 3303 [2021-06-05 15:03:31,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 611.5ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:31,168 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3303 states. [2021-06-05 15:03:31,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3303 to 2962. [2021-06-05 15:03:31,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2962 states, 2961 states have (on average 4.141506247889227) internal successors, (12263), 2961 states have internal predecessors, (12263), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2962 states to 2962 states and 12263 transitions. [2021-06-05 15:03:31,203 INFO L78 Accepts]: Start accepts. Automaton has 2962 states and 12263 transitions. Word has length 23 [2021-06-05 15:03:31,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:31,203 INFO L482 AbstractCegarLoop]: Abstraction has 2962 states and 12263 transitions. [2021-06-05 15:03:31,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:31,203 INFO L276 IsEmpty]: Start isEmpty. Operand 2962 states and 12263 transitions. [2021-06-05 15:03:31,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:31,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:31,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:31,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable92 [2021-06-05 15:03:31,409 INFO L430 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:31,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:31,409 INFO L82 PathProgramCache]: Analyzing trace with hash -768585441, now seen corresponding path program 39 times [2021-06-05 15:03:31,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:31,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [208650587] [2021-06-05 15:03:31,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:31,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:31,536 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:31,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [208650587] [2021-06-05 15:03:31,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [208650587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698416952] [2021-06-05 15:03:31,537 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:31,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:31,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:31,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:03:31,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:31,680 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:31,700 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:03:31,700 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 15:03:31,705 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:03:31,709 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:31,710 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:31,710 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 15:03:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:31,749 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698416952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:31,749 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:31,749 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:03:31,749 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1180783570] [2021-06-05 15:03:31,749 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:31,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:31,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:31,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:31,749 INFO L87 Difference]: Start difference. First operand 2962 states and 12263 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:32,514 INFO L93 Difference]: Finished difference Result 3338 states and 13726 transitions. [2021-06-05 15:03:32,514 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:03:32,514 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:32,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:32,520 INFO L225 Difference]: With dead ends: 3338 [2021-06-05 15:03:32,520 INFO L226 Difference]: Without dead ends: 3315 [2021-06-05 15:03:32,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 557.0ms TimeCoverageRelationStatistics Valid=137, Invalid=1053, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:03:32,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3315 states. [2021-06-05 15:03:32,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3315 to 2954. [2021-06-05 15:03:32,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2954 states, 2953 states have (on average 4.14121232644768) internal successors, (12229), 2953 states have internal predecessors, (12229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2954 states to 2954 states and 12229 transitions. [2021-06-05 15:03:32,559 INFO L78 Accepts]: Start accepts. Automaton has 2954 states and 12229 transitions. Word has length 23 [2021-06-05 15:03:32,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:32,559 INFO L482 AbstractCegarLoop]: Abstraction has 2954 states and 12229 transitions. [2021-06-05 15:03:32,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:32,559 INFO L276 IsEmpty]: Start isEmpty. Operand 2954 states and 12229 transitions. [2021-06-05 15:03:32,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:32,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:32,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:32,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:32,765 INFO L430 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:32,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:32,765 INFO L82 PathProgramCache]: Analyzing trace with hash 2129186517, now seen corresponding path program 40 times [2021-06-05 15:03:32,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:32,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677594659] [2021-06-05 15:03:32,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:32,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:32,911 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:32,912 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677594659] [2021-06-05 15:03:32,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [677594659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:32,912 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617160583] [2021-06-05 15:03:32,912 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:32,938 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:32,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:32,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:32,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:33,047 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:33,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:33,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:33,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:33,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:33,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:33,154 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:33,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617160583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:33,154 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:33,154 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:33,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1823145916] [2021-06-05 15:03:33,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:33,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:33,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:33,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:33,155 INFO L87 Difference]: Start difference. First operand 2954 states and 12229 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:33,979 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:33,979 INFO L93 Difference]: Finished difference Result 3650 states and 14966 transitions. [2021-06-05 15:03:33,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:33,979 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:33,979 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:33,986 INFO L225 Difference]: With dead ends: 3650 [2021-06-05 15:03:33,986 INFO L226 Difference]: Without dead ends: 3628 [2021-06-05 15:03:33,986 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:33,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3628 states. [2021-06-05 15:03:34,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3628 to 2982. [2021-06-05 15:03:34,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 15:03:34,026 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 15:03:34,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:34,027 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 15:03:34,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:34,027 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 15:03:34,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:34,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:34,031 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:34,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2021-06-05 15:03:34,231 INFO L430 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:34,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:34,231 INFO L82 PathProgramCache]: Analyzing trace with hash -1580446827, now seen corresponding path program 41 times [2021-06-05 15:03:34,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:34,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466957575] [2021-06-05 15:03:34,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:34,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:34,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:34,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:34,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466957575] [2021-06-05 15:03:34,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466957575] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [948210320] [2021-06-05 15:03:34,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:34,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:03:34,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:34,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:34,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:34,508 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:34,521 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,521 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 21 treesize of output 45 [2021-06-05 15:03:34,522 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:34,536 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:34,541 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:34,541 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:32, output treesize:73 [2021-06-05 15:03:34,640 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:34,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [948210320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:34,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:34,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:03:34,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649264820] [2021-06-05 15:03:34,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:34,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:34,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:34,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:34,641 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:35,702 INFO L93 Difference]: Finished difference Result 3408 states and 13968 transitions. [2021-06-05 15:03:35,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:35,702 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:35,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:35,708 INFO L225 Difference]: With dead ends: 3408 [2021-06-05 15:03:35,708 INFO L226 Difference]: Without dead ends: 3382 [2021-06-05 15:03:35,708 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 949.1ms TimeCoverageRelationStatistics Valid=224, Invalid=1108, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:03:35,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3382 states. [2021-06-05 15:03:35,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3382 to 2986. [2021-06-05 15:03:35,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2986 states, 2985 states have (on average 4.1457286432160805) internal successors, (12375), 2985 states have internal predecessors, (12375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2986 states to 2986 states and 12375 transitions. [2021-06-05 15:03:35,745 INFO L78 Accepts]: Start accepts. Automaton has 2986 states and 12375 transitions. Word has length 23 [2021-06-05 15:03:35,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:35,746 INFO L482 AbstractCegarLoop]: Abstraction has 2986 states and 12375 transitions. [2021-06-05 15:03:35,746 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:35,746 INFO L276 IsEmpty]: Start isEmpty. Operand 2986 states and 12375 transitions. [2021-06-05 15:03:35,749 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:35,749 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:35,749 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:35,950 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:35,950 INFO L430 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:35,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:35,950 INFO L82 PathProgramCache]: Analyzing trace with hash 33119907, now seen corresponding path program 42 times [2021-06-05 15:03:35,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:35,950 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391469720] [2021-06-05 15:03:35,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:35,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:36,103 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391469720] [2021-06-05 15:03:36,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [391469720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069401878] [2021-06-05 15:03:36,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:36,129 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:36,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:36,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:03:36,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:36,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:36,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 15:03:36,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,261 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:36,265 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:36,265 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 15:03:36,321 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:36,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069401878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:36,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:36,322 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:03:36,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472246520] [2021-06-05 15:03:36,322 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:36,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:36,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:36,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:36,322 INFO L87 Difference]: Start difference. First operand 2986 states and 12375 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:36,913 INFO L93 Difference]: Finished difference Result 3571 states and 14632 transitions. [2021-06-05 15:03:36,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:36,914 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:36,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:36,920 INFO L225 Difference]: With dead ends: 3571 [2021-06-05 15:03:36,920 INFO L226 Difference]: Without dead ends: 3550 [2021-06-05 15:03:36,920 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 457.4ms TimeCoverageRelationStatistics Valid=188, Invalid=742, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:36,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3550 states. [2021-06-05 15:03:36,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3550 to 2982. [2021-06-05 15:03:36,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 15:03:36,959 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 15:03:36,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:36,959 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 15:03:36,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:36,959 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 15:03:36,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:36,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:36,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:37,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2021-06-05 15:03:37,164 INFO L430 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:37,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:37,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1816283401, now seen corresponding path program 43 times [2021-06-05 15:03:37,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:37,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [480604249] [2021-06-05 15:03:37,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:37,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,255 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,256 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:37,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [480604249] [2021-06-05 15:03:37,256 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [480604249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,256 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383643042] [2021-06-05 15:03:37,256 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:37,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:37,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:37,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:37,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:37,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:37,389 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:37,389 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:37,461 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:37,461 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383643042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:37,461 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:37,461 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:37,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839786525] [2021-06-05 15:03:37,462 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:37,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:37,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:37,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:37,463 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:38,176 INFO L93 Difference]: Finished difference Result 3819 states and 15624 transitions. [2021-06-05 15:03:38,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:38,176 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:38,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:38,183 INFO L225 Difference]: With dead ends: 3819 [2021-06-05 15:03:38,183 INFO L226 Difference]: Without dead ends: 3789 [2021-06-05 15:03:38,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 499.6ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:38,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-06-05 15:03:38,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 2982. [2021-06-05 15:03:38,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2982 states, 2981 states have (on average 4.145924186514592) internal successors, (12359), 2981 states have internal predecessors, (12359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2982 states to 2982 states and 12359 transitions. [2021-06-05 15:03:38,224 INFO L78 Accepts]: Start accepts. Automaton has 2982 states and 12359 transitions. Word has length 23 [2021-06-05 15:03:38,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:38,224 INFO L482 AbstractCegarLoop]: Abstraction has 2982 states and 12359 transitions. [2021-06-05 15:03:38,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:38,224 INFO L276 IsEmpty]: Start isEmpty. Operand 2982 states and 12359 transitions. [2021-06-05 15:03:38,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:38,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:38,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:38,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,429 INFO L430 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:38,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:38,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1734884345, now seen corresponding path program 44 times [2021-06-05 15:03:38,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:38,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893509829] [2021-06-05 15:03:38,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:38,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:38,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,526 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:38,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893509829] [2021-06-05 15:03:38,526 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [893509829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,526 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278900743] [2021-06-05 15:03:38,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:38,551 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:38,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:38,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:38,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:38,623 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:38,624 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:38,625 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:38,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:38,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:38,713 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:38,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [278900743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:38,713 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:38,713 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:38,713 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678642849] [2021-06-05 15:03:38,713 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:38,713 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:38,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:38,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:38,714 INFO L87 Difference]: Start difference. First operand 2982 states and 12359 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:39,372 INFO L93 Difference]: Finished difference Result 3585 states and 14706 transitions. [2021-06-05 15:03:39,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:03:39,372 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:39,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:39,378 INFO L225 Difference]: With dead ends: 3585 [2021-06-05 15:03:39,378 INFO L226 Difference]: Without dead ends: 3559 [2021-06-05 15:03:39,378 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 575.4ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:39,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3559 states. [2021-06-05 15:03:39,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3559 to 2990. [2021-06-05 15:03:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 4.146202743392439) internal successors, (12393), 2989 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 12393 transitions. [2021-06-05 15:03:39,419 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 12393 transitions. Word has length 23 [2021-06-05 15:03:39,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:39,419 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 12393 transitions. [2021-06-05 15:03:39,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:39,419 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 12393 transitions. [2021-06-05 15:03:39,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:39,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:39,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:39,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2021-06-05 15:03:39,624 INFO L430 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:39,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:39,624 INFO L82 PathProgramCache]: Analyzing trace with hash -121317611, now seen corresponding path program 45 times [2021-06-05 15:03:39,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:39,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45285893] [2021-06-05 15:03:39,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:39,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:39,724 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:39,724 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45285893] [2021-06-05 15:03:39,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45285893] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,725 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106600557] [2021-06-05 15:03:39,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:39,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:03:39,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:39,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:39,764 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:39,838 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:39,840 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:39,847 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:39,848 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:39,848 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:39,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:39,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1106600557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:39,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:39,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:39,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566663151] [2021-06-05 15:03:39,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:39,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:39,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:39,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:39,927 INFO L87 Difference]: Start difference. First operand 2990 states and 12393 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:40,670 INFO L93 Difference]: Finished difference Result 3586 states and 14697 transitions. [2021-06-05 15:03:40,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:40,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:40,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:40,677 INFO L225 Difference]: With dead ends: 3586 [2021-06-05 15:03:40,677 INFO L226 Difference]: Without dead ends: 3565 [2021-06-05 15:03:40,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 597.5ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:40,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3565 states. [2021-06-05 15:03:40,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3565 to 2990. [2021-06-05 15:03:40,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2990 states, 2989 states have (on average 4.146202743392439) internal successors, (12393), 2989 states have internal predecessors, (12393), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2990 states to 2990 states and 12393 transitions. [2021-06-05 15:03:40,716 INFO L78 Accepts]: Start accepts. Automaton has 2990 states and 12393 transitions. Word has length 23 [2021-06-05 15:03:40,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:40,716 INFO L482 AbstractCegarLoop]: Abstraction has 2990 states and 12393 transitions. [2021-06-05 15:03:40,716 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:40,716 INFO L276 IsEmpty]: Start isEmpty. Operand 2990 states and 12393 transitions. [2021-06-05 15:03:40,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:40,720 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:40,720 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:40,920 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2021-06-05 15:03:40,920 INFO L430 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:40,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:40,920 INFO L82 PathProgramCache]: Analyzing trace with hash -2040830955, now seen corresponding path program 46 times [2021-06-05 15:03:40,921 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:40,921 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365174930] [2021-06-05 15:03:40,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:40,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:41,021 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365174930] [2021-06-05 15:03:41,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365174930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [387995005] [2021-06-05 15:03:41,021 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:41,045 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:41,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:41,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:41,047 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:41,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:41,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:41,140 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:41,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:41,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:41,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:41,211 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:41,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [387995005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:41,211 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:41,211 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:41,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014422999] [2021-06-05 15:03:41,211 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:41,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:41,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:41,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:41,212 INFO L87 Difference]: Start difference. First operand 2990 states and 12393 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:41,821 INFO L93 Difference]: Finished difference Result 3478 states and 14275 transitions. [2021-06-05 15:03:41,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:03:41,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:41,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:41,827 INFO L225 Difference]: With dead ends: 3478 [2021-06-05 15:03:41,827 INFO L226 Difference]: Without dead ends: 3444 [2021-06-05 15:03:41,827 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 425.4ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:41,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3444 states. [2021-06-05 15:03:41,859 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3444 to 3002. [2021-06-05 15:03:41,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 15:03:41,867 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 15:03:41,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:41,867 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 15:03:41,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:41,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 15:03:41,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:41,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:41,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:42,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 67 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2021-06-05 15:03:42,073 INFO L430 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:42,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:42,074 INFO L82 PathProgramCache]: Analyzing trace with hash -1886393437, now seen corresponding path program 47 times [2021-06-05 15:03:42,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:42,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155637595] [2021-06-05 15:03:42,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:42,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,162 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:42,162 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155637595] [2021-06-05 15:03:42,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1155637595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,163 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [726466155] [2021-06-05 15:03:42,163 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:42,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:03:42,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:42,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:42,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:42,279 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,279 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:42,281 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,288 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:42,289 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:42,289 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:42,364 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:42,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [726466155] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:42,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:42,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:42,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [489533344] [2021-06-05 15:03:42,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:42,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:42,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:42,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:42,365 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:42,884 INFO L93 Difference]: Finished difference Result 3510 states and 14401 transitions. [2021-06-05 15:03:42,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:42,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:42,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:42,890 INFO L225 Difference]: With dead ends: 3510 [2021-06-05 15:03:42,890 INFO L226 Difference]: Without dead ends: 3480 [2021-06-05 15:03:42,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 435.8ms TimeCoverageRelationStatistics Valid=149, Invalid=721, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:42,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3480 states. [2021-06-05 15:03:42,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3480 to 3002. [2021-06-05 15:03:42,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 15:03:42,929 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 15:03:42,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:42,929 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 15:03:42,929 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 15:03:42,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:42,933 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:42,933 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:43,134 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,134 INFO L430 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1804994381, now seen corresponding path program 48 times [2021-06-05 15:03:43,135 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:43,135 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134286526] [2021-06-05 15:03:43,135 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:43,243 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134286526] [2021-06-05 15:03:43,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134286526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767409505] [2021-06-05 15:03:43,243 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:43,268 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:43,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:43,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:03:43,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:43,351 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:43,371 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:03:43,371 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:03:43,372 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,383 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:43,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:43,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:03:43,476 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:43,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767409505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:43,477 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:43,477 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:03:43,477 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687172713] [2021-06-05 15:03:43,477 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:03:43,477 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:43,477 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:03:43,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:03:43,477 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:43,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:43,990 INFO L93 Difference]: Finished difference Result 3360 states and 13811 transitions. [2021-06-05 15:03:43,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:43,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:43,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:43,996 INFO L225 Difference]: With dead ends: 3360 [2021-06-05 15:03:43,996 INFO L226 Difference]: Without dead ends: 3334 [2021-06-05 15:03:43,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=140, Invalid=852, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:03:43,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3334 states. [2021-06-05 15:03:44,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3334 to 3010. [2021-06-05 15:03:44,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3010 states, 3009 states have (on average 4.146892655367232) internal successors, (12478), 3009 states have internal predecessors, (12478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3010 states to 3010 states and 12478 transitions. [2021-06-05 15:03:44,035 INFO L78 Accepts]: Start accepts. Automaton has 3010 states and 12478 transitions. Word has length 23 [2021-06-05 15:03:44,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:44,035 INFO L482 AbstractCegarLoop]: Abstraction has 3010 states and 12478 transitions. [2021-06-05 15:03:44,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:44,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3010 states and 12478 transitions. [2021-06-05 15:03:44,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:44,039 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:44,039 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:44,239 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:44,239 INFO L430 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:44,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:44,240 INFO L82 PathProgramCache]: Analyzing trace with hash -191427647, now seen corresponding path program 49 times [2021-06-05 15:03:44,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:44,240 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501696813] [2021-06-05 15:03:44,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:44,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:44,336 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501696813] [2021-06-05 15:03:44,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501696813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [935903084] [2021-06-05 15:03:44,336 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:44,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:44,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:44,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:44,439 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:44,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:44,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,448 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:44,449 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:44,449 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:44,529 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:44,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [935903084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:44,529 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:44,529 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:44,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641827022] [2021-06-05 15:03:44,530 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:44,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:44,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:44,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:44,530 INFO L87 Difference]: Start difference. First operand 3010 states and 12478 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:45,322 INFO L93 Difference]: Finished difference Result 3475 states and 14253 transitions. [2021-06-05 15:03:45,322 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:45,322 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:45,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:45,328 INFO L225 Difference]: With dead ends: 3475 [2021-06-05 15:03:45,328 INFO L226 Difference]: Without dead ends: 3454 [2021-06-05 15:03:45,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:45,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3454 states. [2021-06-05 15:03:45,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3454 to 3002. [2021-06-05 15:03:45,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3002 states, 3001 states have (on average 4.146617794068644) internal successors, (12444), 3001 states have internal predecessors, (12444), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3002 states to 3002 states and 12444 transitions. [2021-06-05 15:03:45,366 INFO L78 Accepts]: Start accepts. Automaton has 3002 states and 12444 transitions. Word has length 23 [2021-06-05 15:03:45,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:45,366 INFO L482 AbstractCegarLoop]: Abstraction has 3002 states and 12444 transitions. [2021-06-05 15:03:45,366 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:45,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3002 states and 12444 transitions. [2021-06-05 15:03:45,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:45,370 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:45,370 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:45,571 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 70 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2021-06-05 15:03:45,571 INFO L430 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:45,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:45,571 INFO L82 PathProgramCache]: Analyzing trace with hash -1046511881, now seen corresponding path program 50 times [2021-06-05 15:03:45,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:45,571 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229205019] [2021-06-05 15:03:45,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:45,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:45,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:45,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229205019] [2021-06-05 15:03:45,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229205019] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856801111] [2021-06-05 15:03:45,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:45,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:45,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:45,704 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:03:45,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:45,799 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,799 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:45,800 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,808 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:45,808 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:45,808 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:45,875 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:45,875 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856801111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:45,875 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:45,875 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:45,875 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647819905] [2021-06-05 15:03:45,875 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:45,875 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:45,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:45,875 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:45,875 INFO L87 Difference]: Start difference. First operand 3002 states and 12444 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:46,848 INFO L93 Difference]: Finished difference Result 3503 states and 14345 transitions. [2021-06-05 15:03:46,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:03:46,848 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:46,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:46,854 INFO L225 Difference]: With dead ends: 3503 [2021-06-05 15:03:46,855 INFO L226 Difference]: Without dead ends: 3494 [2021-06-05 15:03:46,855 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 815.6ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:03:46,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3494 states. [2021-06-05 15:03:46,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3494 to 3084. [2021-06-05 15:03:46,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3084 states, 3083 states have (on average 4.150827116445021) internal successors, (12797), 3083 states have internal predecessors, (12797), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3084 states to 3084 states and 12797 transitions. [2021-06-05 15:03:46,896 INFO L78 Accepts]: Start accepts. Automaton has 3084 states and 12797 transitions. Word has length 23 [2021-06-05 15:03:46,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:46,896 INFO L482 AbstractCegarLoop]: Abstraction has 3084 states and 12797 transitions. [2021-06-05 15:03:46,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:46,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3084 states and 12797 transitions. [2021-06-05 15:03:46,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:46,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:46,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:47,104 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2021-06-05 15:03:47,105 INFO L430 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:47,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:47,105 INFO L82 PathProgramCache]: Analyzing trace with hash -131430393, now seen corresponding path program 51 times [2021-06-05 15:03:47,105 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:47,105 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813482201] [2021-06-05 15:03:47,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:47,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:47,208 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:47,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813482201] [2021-06-05 15:03:47,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813482201] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59030528] [2021-06-05 15:03:47,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:47,268 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:03:47,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:47,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:03:47,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:47,359 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:47,360 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:47,360 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 15:03:47,361 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:47,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:47,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:12 [2021-06-05 15:03:47,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:47,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59030528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:47,395 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:47,395 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:47,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271748341] [2021-06-05 15:03:47,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:47,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:47,396 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:47,396 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:47,396 INFO L87 Difference]: Start difference. First operand 3084 states and 12797 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:47,886 INFO L93 Difference]: Finished difference Result 3799 states and 15493 transitions. [2021-06-05 15:03:47,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:03:47,887 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:47,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:47,893 INFO L225 Difference]: With dead ends: 3799 [2021-06-05 15:03:47,893 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 15:03:47,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 387.0ms TimeCoverageRelationStatistics Valid=126, Invalid=426, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:03:47,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 15:03:47,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3222. [2021-06-05 15:03:47,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3222 states, 3221 states have (on average 4.163924247128221) internal successors, (13412), 3221 states have internal predecessors, (13412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3222 states to 3222 states and 13412 transitions. [2021-06-05 15:03:47,937 INFO L78 Accepts]: Start accepts. Automaton has 3222 states and 13412 transitions. Word has length 23 [2021-06-05 15:03:47,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:47,937 INFO L482 AbstractCegarLoop]: Abstraction has 3222 states and 13412 transitions. [2021-06-05 15:03:47,937 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:47,937 INFO L276 IsEmpty]: Start isEmpty. Operand 3222 states and 13412 transitions. [2021-06-05 15:03:47,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:47,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:47,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:48,142 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2021-06-05 15:03:48,142 INFO L430 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash 23007125, now seen corresponding path program 52 times [2021-06-05 15:03:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:48,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031858857] [2021-06-05 15:03:48,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:48,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:48,239 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:48,239 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031858857] [2021-06-05 15:03:48,239 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031858857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,239 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663807811] [2021-06-05 15:03:48,239 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:48,264 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:48,264 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:48,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:48,265 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:48,368 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,369 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:48,370 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:48,378 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:48,379 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:48,379 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:48,441 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:48,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1663807811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:48,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:48,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:48,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [217151058] [2021-06-05 15:03:48,442 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:48,442 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:48,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:48,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:48,442 INFO L87 Difference]: Start difference. First operand 3222 states and 13412 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:49,690 INFO L93 Difference]: Finished difference Result 4809 states and 19560 transitions. [2021-06-05 15:03:49,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:03:49,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:49,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:49,699 INFO L225 Difference]: With dead ends: 4809 [2021-06-05 15:03:49,699 INFO L226 Difference]: Without dead ends: 4770 [2021-06-05 15:03:49,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 386 ImplicationChecksByTransitivity, 1031.4ms TimeCoverageRelationStatistics Valid=272, Invalid=1368, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:03:49,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4770 states. [2021-06-05 15:03:49,740 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4770 to 3254. [2021-06-05 15:03:49,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3254 states, 3253 states have (on average 4.171841377190286) internal successors, (13571), 3253 states have internal predecessors, (13571), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3254 states to 3254 states and 13571 transitions. [2021-06-05 15:03:49,750 INFO L78 Accepts]: Start accepts. Automaton has 3254 states and 13571 transitions. Word has length 23 [2021-06-05 15:03:49,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:49,750 INFO L482 AbstractCegarLoop]: Abstraction has 3254 states and 13571 transitions. [2021-06-05 15:03:49,750 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:49,750 INFO L276 IsEmpty]: Start isEmpty. Operand 3254 states and 13571 transitions. [2021-06-05 15:03:49,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:49,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:49,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:49,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2021-06-05 15:03:49,955 INFO L430 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:49,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:49,955 INFO L82 PathProgramCache]: Analyzing trace with hash 104406181, now seen corresponding path program 53 times [2021-06-05 15:03:49,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:49,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1009376287] [2021-06-05 15:03:49,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:49,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:50,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,047 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:50,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1009376287] [2021-06-05 15:03:50,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1009376287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,047 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063420653] [2021-06-05 15:03:50,047 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:50,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:03:50,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:50,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:50,074 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:50,152 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:50,153 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:50,154 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,162 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:50,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:50,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:50,254 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:50,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063420653] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:50,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:50,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:50,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131498418] [2021-06-05 15:03:50,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:50,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:50,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:50,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:50,255 INFO L87 Difference]: Start difference. First operand 3254 states and 13571 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:51,651 INFO L93 Difference]: Finished difference Result 4296 states and 17603 transitions. [2021-06-05 15:03:51,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:03:51,651 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:51,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:51,659 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 15:03:51,659 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 15:03:51,659 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 456 ImplicationChecksByTransitivity, 1197.1ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:03:51,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 15:03:51,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3290. [2021-06-05 15:03:51,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3290 states, 3289 states have (on average 4.176649437519003) internal successors, (13737), 3289 states have internal predecessors, (13737), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3290 states to 3290 states and 13737 transitions. [2021-06-05 15:03:51,706 INFO L78 Accepts]: Start accepts. Automaton has 3290 states and 13737 transitions. Word has length 23 [2021-06-05 15:03:51,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:51,706 INFO L482 AbstractCegarLoop]: Abstraction has 3290 states and 13737 transitions. [2021-06-05 15:03:51,706 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:51,706 INFO L276 IsEmpty]: Start isEmpty. Operand 3290 states and 13737 transitions. [2021-06-05 15:03:51,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:51,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:51,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:51,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:51,933 INFO L430 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:51,933 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:51,933 INFO L82 PathProgramCache]: Analyzing trace with hash 1717972915, now seen corresponding path program 54 times [2021-06-05 15:03:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:51,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995528549] [2021-06-05 15:03:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:51,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:52,039 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,039 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995528549] [2021-06-05 15:03:52,039 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1995528549] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,039 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355836612] [2021-06-05 15:03:52,039 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:52,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:03:52,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:03:52,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:52,157 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:03:52,157 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:03:52,163 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:52,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:03:52,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:52,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:52,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:52,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:03:52,242 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:52,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [355836612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:52,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:52,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:52,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [869937492] [2021-06-05 15:03:52,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:52,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:52,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:52,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:52,243 INFO L87 Difference]: Start difference. First operand 3290 states and 13737 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:52,944 INFO L93 Difference]: Finished difference Result 4047 states and 16638 transitions. [2021-06-05 15:03:52,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:03:52,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:52,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:52,951 INFO L225 Difference]: With dead ends: 4047 [2021-06-05 15:03:52,951 INFO L226 Difference]: Without dead ends: 4015 [2021-06-05 15:03:52,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 664.3ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:03:52,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4015 states. [2021-06-05 15:03:52,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4015 to 3328. [2021-06-05 15:03:52,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3328 states, 3327 states have (on average 4.179440937781785) internal successors, (13905), 3327 states have internal predecessors, (13905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3328 states to 3328 states and 13905 transitions. [2021-06-05 15:03:52,996 INFO L78 Accepts]: Start accepts. Automaton has 3328 states and 13905 transitions. Word has length 23 [2021-06-05 15:03:52,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:52,996 INFO L482 AbstractCegarLoop]: Abstraction has 3328 states and 13905 transitions. [2021-06-05 15:03:52,996 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:52,996 INFO L276 IsEmpty]: Start isEmpty. Operand 3328 states and 13905 transitions. [2021-06-05 15:03:53,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:53,001 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:53,001 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:53,201 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,202 INFO L430 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:53,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:53,202 INFO L82 PathProgramCache]: Analyzing trace with hash 1054200805, now seen corresponding path program 55 times [2021-06-05 15:03:53,202 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:53,202 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [83026654] [2021-06-05 15:03:53,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:53,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,347 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:53,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [83026654] [2021-06-05 15:03:53,347 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [83026654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682098339] [2021-06-05 15:03:53,347 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:53,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:53,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:53,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:53,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:53,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:53,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:53,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:53,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:53,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682098339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:53,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:53,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:53,538 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1333284805] [2021-06-05 15:03:53,538 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:53,538 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:53,539 INFO L87 Difference]: Start difference. First operand 3328 states and 13905 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:54,479 INFO L93 Difference]: Finished difference Result 3976 states and 16457 transitions. [2021-06-05 15:03:54,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:54,479 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:54,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:54,486 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 15:03:54,486 INFO L226 Difference]: Without dead ends: 3954 [2021-06-05 15:03:54,486 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 810.9ms TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:54,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3954 states. [2021-06-05 15:03:54,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3954 to 3340. [2021-06-05 15:03:54,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 15:03:54,532 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 15:03:54,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:54,532 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 15:03:54,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:54,532 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 15:03:54,537 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:54,537 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:54,537 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:54,737 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:54,737 INFO L430 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:54,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:54,738 INFO L82 PathProgramCache]: Analyzing trace with hash 1639534757, now seen corresponding path program 56 times [2021-06-05 15:03:54,738 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:54,738 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586180909] [2021-06-05 15:03:54,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:54,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:54,890 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:54,890 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:54,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586180909] [2021-06-05 15:03:54,890 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586180909] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:54,890 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365009796] [2021-06-05 15:03:54,890 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:54,921 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:03:54,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:54,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:54,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:55,002 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:55,002 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:55,003 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:55,013 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:55,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:55,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:55,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365009796] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:55,107 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:55,107 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:55,107 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097719884] [2021-06-05 15:03:55,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:55,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:55,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:55,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:55,108 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:55,847 INFO L93 Difference]: Finished difference Result 3805 states and 15756 transitions. [2021-06-05 15:03:55,847 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:03:55,847 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:55,847 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:55,854 INFO L225 Difference]: With dead ends: 3805 [2021-06-05 15:03:55,854 INFO L226 Difference]: Without dead ends: 3779 [2021-06-05 15:03:55,854 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 672.1ms TimeCoverageRelationStatistics Valid=177, Invalid=635, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:03:55,857 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3779 states. [2021-06-05 15:03:55,887 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3779 to 3344. [2021-06-05 15:03:55,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.1809751720011965) internal successors, (13977), 3343 states have internal predecessors, (13977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13977 transitions. [2021-06-05 15:03:55,897 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13977 transitions. Word has length 23 [2021-06-05 15:03:55,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:55,897 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 13977 transitions. [2021-06-05 15:03:55,897 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:55,897 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13977 transitions. [2021-06-05 15:03:55,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:55,902 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:55,902 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:56,102 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 77 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2021-06-05 15:03:56,102 INFO L430 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:56,102 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:56,103 INFO L82 PathProgramCache]: Analyzing trace with hash -1041865805, now seen corresponding path program 57 times [2021-06-05 15:03:56,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:56,103 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242144378] [2021-06-05 15:03:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:56,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:56,249 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:56,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242144378] [2021-06-05 15:03:56,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242144378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202871639] [2021-06-05 15:03:56,250 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:56,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:03:56,278 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:56,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:56,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:56,355 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:56,355 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:56,356 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,364 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:56,364 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:56,364 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:56,475 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:56,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1202871639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:56,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:56,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:56,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497665175] [2021-06-05 15:03:56,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:56,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:56,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:56,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:56,476 INFO L87 Difference]: Start difference. First operand 3344 states and 13977 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:57,480 INFO L93 Difference]: Finished difference Result 3845 states and 15919 transitions. [2021-06-05 15:03:57,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:57,480 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:57,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:57,487 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 15:03:57,487 INFO L226 Difference]: Without dead ends: 3824 [2021-06-05 15:03:57,488 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 899.0ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:57,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3824 states. [2021-06-05 15:03:57,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3824 to 3336. [2021-06-05 15:03:57,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3336 states, 3335 states have (on average 4.1808095952023985) internal successors, (13943), 3335 states have internal predecessors, (13943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3336 states to 3336 states and 13943 transitions. [2021-06-05 15:03:57,533 INFO L78 Accepts]: Start accepts. Automaton has 3336 states and 13943 transitions. Word has length 23 [2021-06-05 15:03:57,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:57,534 INFO L482 AbstractCegarLoop]: Abstraction has 3336 states and 13943 transitions. [2021-06-05 15:03:57,534 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:57,534 INFO L276 IsEmpty]: Start isEmpty. Operand 3336 states and 13943 transitions. [2021-06-05 15:03:57,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:57,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:57,539 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:57,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2021-06-05 15:03:57,739 INFO L430 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:57,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:57,739 INFO L82 PathProgramCache]: Analyzing trace with hash 1403698183, now seen corresponding path program 58 times [2021-06-05 15:03:57,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:57,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1329021541] [2021-06-05 15:03:57,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:57,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:57,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:57,835 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:57,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1329021541] [2021-06-05 15:03:57,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1329021541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:57,835 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [370872408] [2021-06-05 15:03:57,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:57,861 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:03:57,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:57,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:57,862 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:57,947 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:57,948 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:03:57,949 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:57,956 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:57,957 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:57,957 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:03:58,019 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [370872408] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:58,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:58,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441235083] [2021-06-05 15:03:58,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:58,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:58,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:58,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:58,019 INFO L87 Difference]: Start difference. First operand 3336 states and 13943 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:58,530 INFO L93 Difference]: Finished difference Result 4068 states and 16800 transitions. [2021-06-05 15:03:58,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:03:58,530 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:58,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:58,537 INFO L225 Difference]: With dead ends: 4068 [2021-06-05 15:03:58,537 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 15:03:58,537 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 424.5ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:03:58,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 15:03:58,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3340. [2021-06-05 15:03:58,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 15:03:58,582 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 15:03:58,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:58,582 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 15:03:58,601 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:58,601 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 15:03:58,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:58,606 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:58,606 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:03:58,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 79 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2021-06-05 15:03:58,807 INFO L430 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:03:58,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:03:58,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1196303323, now seen corresponding path program 59 times [2021-06-05 15:03:58,807 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:03:58,807 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1231914777] [2021-06-05 15:03:58,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:03:58,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:03:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:58,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:03:58,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1231914777] [2021-06-05 15:03:58,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1231914777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:58,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [738976526] [2021-06-05 15:03:58,902 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:03:58,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:03:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:03:58,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:03:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:03:59,007 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:59,007 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:03:59,008 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:03:59,016 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:03:59,016 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:03:59,017 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:03:59,094 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:03:59,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [738976526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:03:59,094 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:03:59,094 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:03:59,094 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191483165] [2021-06-05 15:03:59,094 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:03:59,094 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:03:59,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:03:59,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:03:59,095 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:03:59,829 INFO L93 Difference]: Finished difference Result 3865 states and 16001 transitions. [2021-06-05 15:03:59,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:03:59,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:03:59,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:03:59,836 INFO L225 Difference]: With dead ends: 3865 [2021-06-05 15:03:59,836 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 15:03:59,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 668.4ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:03:59,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 15:03:59,870 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3340. [2021-06-05 15:03:59,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3340 states, 3339 states have (on average 4.181191973644804) internal successors, (13961), 3339 states have internal predecessors, (13961), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3340 states to 3340 states and 13961 transitions. [2021-06-05 15:03:59,880 INFO L78 Accepts]: Start accepts. Automaton has 3340 states and 13961 transitions. Word has length 23 [2021-06-05 15:03:59,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:03:59,880 INFO L482 AbstractCegarLoop]: Abstraction has 3340 states and 13961 transitions. [2021-06-05 15:03:59,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:03:59,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3340 states and 13961 transitions. [2021-06-05 15:03:59,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:03:59,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:03:59,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:00,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:00,085 INFO L430 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:00,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:00,085 INFO L82 PathProgramCache]: Analyzing trace with hash 1179150629, now seen corresponding path program 60 times [2021-06-05 15:04:00,085 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:00,085 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479401817] [2021-06-05 15:04:00,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:00,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:00,177 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:00,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479401817] [2021-06-05 15:04:00,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1479401817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037452137] [2021-06-05 15:04:00,177 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:00,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:00,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:00,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:04:00,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:00,328 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:04:00,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:04:00,333 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:00,351 INFO L628 ElimStorePlain]: treesize reduction 55, result has 23.6 percent of original size [2021-06-05 15:04:00,351 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:00,351 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 15:04:00,394 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:00,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037452137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:00,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:00,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:00,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107440894] [2021-06-05 15:04:00,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:00,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:00,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:00,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:00,395 INFO L87 Difference]: Start difference. First operand 3340 states and 13961 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:01,142 INFO L93 Difference]: Finished difference Result 3828 states and 15851 transitions. [2021-06-05 15:04:01,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:01,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:01,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:01,149 INFO L225 Difference]: With dead ends: 3828 [2021-06-05 15:04:01,149 INFO L226 Difference]: Without dead ends: 3794 [2021-06-05 15:04:01,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 460.5ms TimeCoverageRelationStatistics Valid=156, Invalid=1104, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:04:01,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-06-05 15:04:01,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3344. [2021-06-05 15:04:01,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3344 states, 3343 states have (on average 4.1809751720011965) internal successors, (13977), 3343 states have internal predecessors, (13977), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3344 states to 3344 states and 13977 transitions. [2021-06-05 15:04:01,192 INFO L78 Accepts]: Start accepts. Automaton has 3344 states and 13977 transitions. Word has length 23 [2021-06-05 15:04:01,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:01,192 INFO L482 AbstractCegarLoop]: Abstraction has 3344 states and 13977 transitions. [2021-06-05 15:04:01,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:01,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3344 states and 13977 transitions. [2021-06-05 15:04:01,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:01,196 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:01,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:01,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,397 INFO L430 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:01,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:01,397 INFO L82 PathProgramCache]: Analyzing trace with hash 1333588147, now seen corresponding path program 61 times [2021-06-05 15:04:01,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:01,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [96099401] [2021-06-05 15:04:01,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:01,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,490 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:01,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [96099401] [2021-06-05 15:04:01,490 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [96099401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,490 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906283859] [2021-06-05 15:04:01,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:01,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:01,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:01,517 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:01,605 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:01,605 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:01,607 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:01,614 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:01,615 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:01,615 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:01,677 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:01,677 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906283859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:01,677 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:01,677 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:01,677 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761179063] [2021-06-05 15:04:01,677 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:01,677 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:01,678 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:01,678 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:01,678 INFO L87 Difference]: Start difference. First operand 3344 states and 13977 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:02,163 INFO L93 Difference]: Finished difference Result 3857 states and 15959 transitions. [2021-06-05 15:04:02,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:02,163 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:02,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:02,170 INFO L225 Difference]: With dead ends: 3857 [2021-06-05 15:04:02,170 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 15:04:02,170 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 388.9ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:02,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 15:04:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3348. [2021-06-05 15:04:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3348 states, 3347 states have (on average 4.181356438601733) internal successors, (13995), 3347 states have internal predecessors, (13995), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3348 states to 3348 states and 13995 transitions. [2021-06-05 15:04:02,215 INFO L78 Accepts]: Start accepts. Automaton has 3348 states and 13995 transitions. Word has length 23 [2021-06-05 15:04:02,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:02,215 INFO L482 AbstractCegarLoop]: Abstraction has 3348 states and 13995 transitions. [2021-06-05 15:04:02,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3348 states and 13995 transitions. [2021-06-05 15:04:02,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:02,220 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:02,220 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:02,420 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 82 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2021-06-05 15:04:02,420 INFO L430 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:02,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:02,421 INFO L82 PathProgramCache]: Analyzing trace with hash 1414987203, now seen corresponding path program 62 times [2021-06-05 15:04:02,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:02,421 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1969735102] [2021-06-05 15:04:02,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:02,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:02,526 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,527 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:02,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1969735102] [2021-06-05 15:04:02,527 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1969735102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,527 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508596520] [2021-06-05 15:04:02,527 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:02,556 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:02,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:02,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:02,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:02,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:02,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:02,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:02,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:02,725 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:02,725 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508596520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:02,725 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:02,725 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:02,725 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038397675] [2021-06-05 15:04:02,725 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:02,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:02,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:02,726 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:02,726 INFO L87 Difference]: Start difference. First operand 3348 states and 13995 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:03,308 INFO L93 Difference]: Finished difference Result 3716 states and 15408 transitions. [2021-06-05 15:04:03,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:03,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:03,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:03,315 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 15:04:03,315 INFO L226 Difference]: Without dead ends: 3690 [2021-06-05 15:04:03,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 503.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:03,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3690 states. [2021-06-05 15:04:03,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3690 to 3352. [2021-06-05 15:04:03,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 15:04:03,361 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 15:04:03,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:03,361 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 15:04:03,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:03,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 15:04:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:03,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:03,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:03,567 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2021-06-05 15:04:03,568 INFO L430 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:03,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:03,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1266413359, now seen corresponding path program 63 times [2021-06-05 15:04:03,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:03,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520877629] [2021-06-05 15:04:03,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:03,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:03,663 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,664 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:03,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520877629] [2021-06-05 15:04:03,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520877629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,664 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476354205] [2021-06-05 15:04:03,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:03,689 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:04:03,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:03,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:03,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:03,768 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:03,768 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:03,769 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:03,779 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:03,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:03,780 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:03,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:03,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [476354205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:03,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:03,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:03,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1052266033] [2021-06-05 15:04:03,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:03,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:03,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:03,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:03,859 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:04,668 INFO L93 Difference]: Finished difference Result 3760 states and 15583 transitions. [2021-06-05 15:04:04,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:04:04,668 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:04,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:04,674 INFO L225 Difference]: With dead ends: 3760 [2021-06-05 15:04:04,674 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 15:04:04,675 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:04:04,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 15:04:04,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3352. [2021-06-05 15:04:04,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 15:04:04,717 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 15:04:04,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:04,717 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 15:04:04,717 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:04,717 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 15:04:04,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:04,721 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:04,721 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:04,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:04,922 INFO L430 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:04,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:04,922 INFO L82 PathProgramCache]: Analyzing trace with hash -855199757, now seen corresponding path program 64 times [2021-06-05 15:04:04,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:04,922 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633906474] [2021-06-05 15:04:04,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:04,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:05,063 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:05,063 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:05,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633906474] [2021-06-05 15:04:05,063 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633906474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,063 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992935554] [2021-06-05 15:04:05,063 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:05,089 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:05,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:05,089 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:05,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:05,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:05,182 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:05,183 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:05,191 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:05,192 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:05,192 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:05,259 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:05,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992935554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:05,259 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:05,259 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:05,259 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611524217] [2021-06-05 15:04:05,259 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:05,259 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:05,259 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:05,259 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:05,259 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:06,061 INFO L93 Difference]: Finished difference Result 3955 states and 16375 transitions. [2021-06-05 15:04:06,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:06,062 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:06,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:06,069 INFO L225 Difference]: With dead ends: 3955 [2021-06-05 15:04:06,069 INFO L226 Difference]: Without dead ends: 3933 [2021-06-05 15:04:06,069 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 730.5ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3933 states. [2021-06-05 15:04:06,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3933 to 3356. [2021-06-05 15:04:06,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 4.181520119225037) internal successors, (14029), 3355 states have internal predecessors, (14029), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 14029 transitions. [2021-06-05 15:04:06,119 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 14029 transitions. Word has length 23 [2021-06-05 15:04:06,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:06,119 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 14029 transitions. [2021-06-05 15:04:06,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:06,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 14029 transitions. [2021-06-05 15:04:06,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:06,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:06,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:06,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2021-06-05 15:04:06,325 INFO L430 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:06,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:06,325 INFO L82 PathProgramCache]: Analyzing trace with hash -269865805, now seen corresponding path program 65 times [2021-06-05 15:04:06,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:06,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1867083774] [2021-06-05 15:04:06,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:06,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:06,474 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,474 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1867083774] [2021-06-05 15:04:06,474 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1867083774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,474 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199178632] [2021-06-05 15:04:06,474 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:06,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:04:06,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:06,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:06,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:06,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:06,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:06,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:06,587 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:06,587 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:06,671 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:06,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199178632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:06,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:06,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:06,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080952831] [2021-06-05 15:04:06,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:06,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:06,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:06,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:06,672 INFO L87 Difference]: Start difference. First operand 3356 states and 14029 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,421 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:07,421 INFO L93 Difference]: Finished difference Result 3899 states and 16126 transitions. [2021-06-05 15:04:07,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:07,422 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:07,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:07,428 INFO L225 Difference]: With dead ends: 3899 [2021-06-05 15:04:07,429 INFO L226 Difference]: Without dead ends: 3873 [2021-06-05 15:04:07,429 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 656.5ms TimeCoverageRelationStatistics Valid=183, Invalid=687, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:07,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3873 states. [2021-06-05 15:04:07,467 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3873 to 3360. [2021-06-05 15:04:07,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 4.18130395951176) internal successors, (14045), 3359 states have internal predecessors, (14045), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 14045 transitions. [2021-06-05 15:04:07,477 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 14045 transitions. Word has length 23 [2021-06-05 15:04:07,477 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:07,477 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 14045 transitions. [2021-06-05 15:04:07,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:07,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 14045 transitions. [2021-06-05 15:04:07,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:07,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:07,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:07,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 86 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2021-06-05 15:04:07,682 INFO L430 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:07,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:07,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1343700929, now seen corresponding path program 66 times [2021-06-05 15:04:07,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:07,682 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312938536] [2021-06-05 15:04:07,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:07,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:07,855 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:07,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312938536] [2021-06-05 15:04:07,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1312938536] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:07,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [526784936] [2021-06-05 15:04:07,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:07,887 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:07,887 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:07,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:07,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:07,995 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:04:07,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 15:04:07,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,010 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:08,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:08,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 15:04:08,076 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:08,077 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [526784936] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:08,077 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:08,077 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:08,077 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525756087] [2021-06-05 15:04:08,077 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:08,077 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:08,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:08,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=316, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:08,077 INFO L87 Difference]: Start difference. First operand 3360 states and 14045 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:09,043 INFO L93 Difference]: Finished difference Result 3778 states and 15654 transitions. [2021-06-05 15:04:09,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:04:09,044 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:09,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:09,050 INFO L225 Difference]: With dead ends: 3778 [2021-06-05 15:04:09,050 INFO L226 Difference]: Without dead ends: 3757 [2021-06-05 15:04:09,050 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 836.5ms TimeCoverageRelationStatistics Valid=241, Invalid=1399, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:04:09,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3757 states. [2021-06-05 15:04:09,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3757 to 3352. [2021-06-05 15:04:09,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3352 states, 3351 states have (on average 4.181139958221427) internal successors, (14011), 3351 states have internal predecessors, (14011), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3352 states to 3352 states and 14011 transitions. [2021-06-05 15:04:09,094 INFO L78 Accepts]: Start accepts. Automaton has 3352 states and 14011 transitions. Word has length 23 [2021-06-05 15:04:09,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:09,094 INFO L482 AbstractCegarLoop]: Abstraction has 3352 states and 14011 transitions. [2021-06-05 15:04:09,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:09,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3352 states and 14011 transitions. [2021-06-05 15:04:09,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:09,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:09,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:09,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2021-06-05 15:04:09,300 INFO L430 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:09,300 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:09,300 INFO L82 PathProgramCache]: Analyzing trace with hash -424303323, now seen corresponding path program 67 times [2021-06-05 15:04:09,300 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:09,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14523143] [2021-06-05 15:04:09,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:09,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,407 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,407 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:09,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14523143] [2021-06-05 15:04:09,407 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14523143] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476361727] [2021-06-05 15:04:09,407 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:09,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:09,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:09,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:09,516 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:09,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:09,518 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:09,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:09,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:09,619 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:09,619 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476361727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:09,619 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:09,619 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:09,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705447702] [2021-06-05 15:04:09,620 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:09,620 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:09,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:09,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:09,620 INFO L87 Difference]: Start difference. First operand 3352 states and 14011 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,321 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:10,321 INFO L93 Difference]: Finished difference Result 3875 states and 16039 transitions. [2021-06-05 15:04:10,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:10,321 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:10,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:10,328 INFO L225 Difference]: With dead ends: 3875 [2021-06-05 15:04:10,328 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 15:04:10,328 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 584.8ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:10,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 15:04:10,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3356. [2021-06-05 15:04:10,366 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3356 states, 3355 states have (on average 4.180923994038748) internal successors, (14027), 3355 states have internal predecessors, (14027), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3356 states to 3356 states and 14027 transitions. [2021-06-05 15:04:10,373 INFO L78 Accepts]: Start accepts. Automaton has 3356 states and 14027 transitions. Word has length 23 [2021-06-05 15:04:10,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:10,374 INFO L482 AbstractCegarLoop]: Abstraction has 3356 states and 14027 transitions. [2021-06-05 15:04:10,374 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:10,374 INFO L276 IsEmpty]: Start isEmpty. Operand 3356 states and 14027 transitions. [2021-06-05 15:04:10,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:10,378 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:10,378 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:10,578 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 88 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2021-06-05 15:04:10,579 INFO L430 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:10,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:10,579 INFO L82 PathProgramCache]: Analyzing trace with hash 59881731, now seen corresponding path program 68 times [2021-06-05 15:04:10,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:10,579 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348185885] [2021-06-05 15:04:10,579 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:10,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:10,709 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:10,710 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:10,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348185885] [2021-06-05 15:04:10,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [348185885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,710 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573655309] [2021-06-05 15:04:10,710 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:10,734 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:10,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:10,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:10,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:10,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:10,837 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:10,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:10,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:10,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:10,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:10,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:10,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573655309] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:10,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:10,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:10,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [651265454] [2021-06-05 15:04:10,907 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:10,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:10,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:10,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:10,907 INFO L87 Difference]: Start difference. First operand 3356 states and 14027 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:11,520 INFO L93 Difference]: Finished difference Result 3877 states and 16068 transitions. [2021-06-05 15:04:11,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:11,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:11,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:11,527 INFO L225 Difference]: With dead ends: 3877 [2021-06-05 15:04:11,528 INFO L226 Difference]: Without dead ends: 3855 [2021-06-05 15:04:11,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 545.1ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:11,531 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3855 states. [2021-06-05 15:04:11,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3855 to 3364. [2021-06-05 15:04:11,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3364 states, 3363 states have (on average 4.181088314005352) internal successors, (14061), 3363 states have internal predecessors, (14061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3364 states to 3364 states and 14061 transitions. [2021-06-05 15:04:11,574 INFO L78 Accepts]: Start accepts. Automaton has 3364 states and 14061 transitions. Word has length 23 [2021-06-05 15:04:11,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:11,574 INFO L482 AbstractCegarLoop]: Abstraction has 3364 states and 14061 transitions. [2021-06-05 15:04:11,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:11,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3364 states and 14061 transitions. [2021-06-05 15:04:11,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:11,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:11,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:11,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,780 INFO L430 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:11,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:11,780 INFO L82 PathProgramCache]: Analyzing trace with hash 645215683, now seen corresponding path program 69 times [2021-06-05 15:04:11,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:11,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395673082] [2021-06-05 15:04:11,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:11,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:11,913 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:11,913 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:11,913 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395673082] [2021-06-05 15:04:11,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395673082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:11,914 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596733527] [2021-06-05 15:04:11,914 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:11,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:04:11,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:11,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:04:11,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:12,057 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:04:12,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 15:04:12,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:12,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:12,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:12,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 15:04:12,171 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:12,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596733527] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:12,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:12,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:12,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203040176] [2021-06-05 15:04:12,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:12,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:12,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:12,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:12,172 INFO L87 Difference]: Start difference. First operand 3364 states and 14061 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:12,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:12,961 INFO L93 Difference]: Finished difference Result 3711 states and 15368 transitions. [2021-06-05 15:04:12,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:04:12,962 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:12,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:12,968 INFO L225 Difference]: With dead ends: 3711 [2021-06-05 15:04:12,968 INFO L226 Difference]: Without dead ends: 3685 [2021-06-05 15:04:12,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 658.8ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:12,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3685 states. [2021-06-05 15:04:13,001 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3685 to 3368. [2021-06-05 15:04:13,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3368 states, 3367 states have (on average 4.1808731808731805) internal successors, (14077), 3367 states have internal predecessors, (14077), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3368 states to 3368 states and 14077 transitions. [2021-06-05 15:04:13,011 INFO L78 Accepts]: Start accepts. Automaton has 3368 states and 14077 transitions. Word has length 23 [2021-06-05 15:04:13,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:13,011 INFO L482 AbstractCegarLoop]: Abstraction has 3368 states and 14077 transitions. [2021-06-05 15:04:13,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:13,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3368 states and 14077 transitions. [2021-06-05 15:04:13,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:13,015 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:13,015 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:13,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,221 INFO L430 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:13,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:13,221 INFO L82 PathProgramCache]: Analyzing trace with hash -2036184879, now seen corresponding path program 70 times [2021-06-05 15:04:13,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:13,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796007045] [2021-06-05 15:04:13,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:13,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:13,356 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796007045] [2021-06-05 15:04:13,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796007045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1942774851] [2021-06-05 15:04:13,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:13,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:13,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:13,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:13,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:13,465 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:13,465 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:13,466 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:13,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:13,474 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:13,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:13,556 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:13,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1942774851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:13,556 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:13,556 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:13,556 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098376388] [2021-06-05 15:04:13,556 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:13,556 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:13,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:13,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:13,556 INFO L87 Difference]: Start difference. First operand 3368 states and 14077 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:14,332 INFO L93 Difference]: Finished difference Result 3766 states and 15611 transitions. [2021-06-05 15:04:14,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:14,333 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:14,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:14,339 INFO L225 Difference]: With dead ends: 3766 [2021-06-05 15:04:14,339 INFO L226 Difference]: Without dead ends: 3745 [2021-06-05 15:04:14,339 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 716.0ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:04:14,342 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3745 states. [2021-06-05 15:04:14,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3745 to 3360. [2021-06-05 15:04:14,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3360 states, 3359 states have (on average 4.180708544209586) internal successors, (14043), 3359 states have internal predecessors, (14043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3360 states to 3360 states and 14043 transitions. [2021-06-05 15:04:14,382 INFO L78 Accepts]: Start accepts. Automaton has 3360 states and 14043 transitions. Word has length 23 [2021-06-05 15:04:14,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:14,382 INFO L482 AbstractCegarLoop]: Abstraction has 3360 states and 14043 transitions. [2021-06-05 15:04:14,382 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:14,382 INFO L276 IsEmpty]: Start isEmpty. Operand 3360 states and 14043 transitions. [2021-06-05 15:04:14,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:14,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:14,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:14,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 91 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2021-06-05 15:04:14,587 INFO L430 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:14,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:14,587 INFO L82 PathProgramCache]: Analyzing trace with hash 214319249, now seen corresponding path program 71 times [2021-06-05 15:04:14,588 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:14,588 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281241817] [2021-06-05 15:04:14,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:14,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:14,752 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:14,752 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:14,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281241817] [2021-06-05 15:04:14,752 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281241817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,752 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142803500] [2021-06-05 15:04:14,752 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:14,778 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:04:14,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:14,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:14,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:14,877 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:14,877 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:14,878 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:14,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:14,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:14,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:14,948 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [142803500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:14,948 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:14,948 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:14,948 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2229589] [2021-06-05 15:04:14,948 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:14,948 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:14,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:14,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:14,949 INFO L87 Difference]: Start difference. First operand 3360 states and 14043 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:15,437 INFO L93 Difference]: Finished difference Result 3765 states and 15626 transitions. [2021-06-05 15:04:15,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:04:15,437 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:15,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:15,444 INFO L225 Difference]: With dead ends: 3765 [2021-06-05 15:04:15,444 INFO L226 Difference]: Without dead ends: 3742 [2021-06-05 15:04:15,444 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:04:15,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3742 states. [2021-06-05 15:04:15,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3742 to 3366. [2021-06-05 15:04:15,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3366 states, 3365 states have (on average 4.180980683506687) internal successors, (14069), 3365 states have internal predecessors, (14069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3366 states to 3366 states and 14069 transitions. [2021-06-05 15:04:15,487 INFO L78 Accepts]: Start accepts. Automaton has 3366 states and 14069 transitions. Word has length 23 [2021-06-05 15:04:15,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:15,487 INFO L482 AbstractCegarLoop]: Abstraction has 3366 states and 14069 transitions. [2021-06-05 15:04:15,488 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:15,488 INFO L276 IsEmpty]: Start isEmpty. Operand 3366 states and 14069 transitions. [2021-06-05 15:04:15,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:15,492 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:15,492 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:15,692 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable171 [2021-06-05 15:04:15,693 INFO L430 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:15,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:15,693 INFO L82 PathProgramCache]: Analyzing trace with hash -614814159, now seen corresponding path program 1 times [2021-06-05 15:04:15,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:15,693 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545256352] [2021-06-05 15:04:15,693 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:15,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,791 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,791 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:15,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545256352] [2021-06-05 15:04:15,791 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545256352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,791 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286948530] [2021-06-05 15:04:15,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:15,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:15,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:15,817 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:15,915 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,915 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:15,916 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,924 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:15,925 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:15,925 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:15,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:15,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286948530] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:15,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:15,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:15,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315730920] [2021-06-05 15:04:15,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:15,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:15,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:15,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:15,987 INFO L87 Difference]: Start difference. First operand 3366 states and 14069 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:16,603 INFO L93 Difference]: Finished difference Result 3716 states and 15432 transitions. [2021-06-05 15:04:16,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:16,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:16,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:16,609 INFO L225 Difference]: With dead ends: 3716 [2021-06-05 15:04:16,609 INFO L226 Difference]: Without dead ends: 3701 [2021-06-05 15:04:16,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 490.5ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:16,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3701 states. [2021-06-05 15:04:16,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3701 to 3372. [2021-06-05 15:04:16,648 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3372 states, 3371 states have (on average 4.1809552061702755) internal successors, (14094), 3371 states have internal predecessors, (14094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,679 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3372 states to 3372 states and 14094 transitions. [2021-06-05 15:04:16,679 INFO L78 Accepts]: Start accepts. Automaton has 3372 states and 14094 transitions. Word has length 23 [2021-06-05 15:04:16,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:16,679 INFO L482 AbstractCegarLoop]: Abstraction has 3372 states and 14094 transitions. [2021-06-05 15:04:16,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:16,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3372 states and 14094 transitions. [2021-06-05 15:04:16,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:16,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:16,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:16,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:16,884 INFO L430 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:16,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:16,885 INFO L82 PathProgramCache]: Analyzing trace with hash -749602063, now seen corresponding path program 2 times [2021-06-05 15:04:16,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:16,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990501209] [2021-06-05 15:04:16,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:16,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:16,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,000 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990501209] [2021-06-05 15:04:17,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990501209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346910589] [2021-06-05 15:04:17,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,028 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:17,028 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:17,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:17,029 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:17,168 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:17,169 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 15:04:17,170 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:17,180 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:17,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:04:17,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-06-05 15:04:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:17,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346910589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:17,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:17,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:04:17,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117050381] [2021-06-05 15:04:17,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:04:17,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:17,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:04:17,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=258, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:17,211 INFO L87 Difference]: Start difference. First operand 3372 states and 14094 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:17,737 INFO L93 Difference]: Finished difference Result 3718 states and 15442 transitions. [2021-06-05 15:04:17,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:04:17,737 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:17,737 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:17,743 INFO L225 Difference]: With dead ends: 3718 [2021-06-05 15:04:17,743 INFO L226 Difference]: Without dead ends: 3703 [2021-06-05 15:04:17,744 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 420.3ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:04:17,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3703 states. [2021-06-05 15:04:17,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3703 to 3386. [2021-06-05 15:04:17,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 4.181683899556869) internal successors, (14155), 3385 states have internal predecessors, (14155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,786 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 14155 transitions. [2021-06-05 15:04:17,787 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 14155 transitions. Word has length 23 [2021-06-05 15:04:17,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:17,787 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 14155 transitions. [2021-06-05 15:04:17,787 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:17,787 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 14155 transitions. [2021-06-05 15:04:17,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:17,791 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:17,791 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:17,994 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,94 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:17,994 INFO L430 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:17,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:17,994 INFO L82 PathProgramCache]: Analyzing trace with hash -164268111, now seen corresponding path program 3 times [2021-06-05 15:04:17,994 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:17,994 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154570279] [2021-06-05 15:04:17,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:17,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:18,100 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:18,100 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:18,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154570279] [2021-06-05 15:04:18,100 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154570279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,100 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490646403] [2021-06-05 15:04:18,100 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:18,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:18,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:18,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:18,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:18,241 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:04:18,241 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 15:04:18,242 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:18,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:18,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:18,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:40 [2021-06-05 15:04:18,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:18,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [490646403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:18,352 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:18,352 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:18,352 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478538749] [2021-06-05 15:04:18,352 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:18,352 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:18,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:18,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:18,352 INFO L87 Difference]: Start difference. First operand 3386 states and 14155 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:19,171 INFO L93 Difference]: Finished difference Result 3761 states and 15604 transitions. [2021-06-05 15:04:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:04:19,172 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:19,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:19,178 INFO L225 Difference]: With dead ends: 3761 [2021-06-05 15:04:19,178 INFO L226 Difference]: Without dead ends: 3739 [2021-06-05 15:04:19,178 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 659.4ms TimeCoverageRelationStatistics Valid=164, Invalid=1026, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:04:19,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3739 states. [2021-06-05 15:04:19,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3739 to 3398. [2021-06-05 15:04:19,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3398 states, 3397 states have (on average 4.181630850750662) internal successors, (14205), 3397 states have internal predecessors, (14205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3398 states to 3398 states and 14205 transitions. [2021-06-05 15:04:19,221 INFO L78 Accepts]: Start accepts. Automaton has 3398 states and 14205 transitions. Word has length 23 [2021-06-05 15:04:19,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:19,221 INFO L482 AbstractCegarLoop]: Abstraction has 3398 states and 14205 transitions. [2021-06-05 15:04:19,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:19,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3398 states and 14205 transitions. [2021-06-05 15:04:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:19,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:19,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:19,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2021-06-05 15:04:19,426 INFO L430 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:19,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:19,427 INFO L82 PathProgramCache]: Analyzing trace with hash 1449298623, now seen corresponding path program 4 times [2021-06-05 15:04:19,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:19,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968542568] [2021-06-05 15:04:19,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:19,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:19,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,546 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968542568] [2021-06-05 15:04:19,546 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968542568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,546 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60117826] [2021-06-05 15:04:19,546 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:19,571 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:19,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:19,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:19,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:19,654 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:19,655 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:19,656 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:19,663 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:19,664 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:19,664 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:19,746 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:19,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60117826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:19,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:19,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:19,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1764870042] [2021-06-05 15:04:19,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:19,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:19,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:19,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:19,747 INFO L87 Difference]: Start difference. First operand 3398 states and 14205 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:20,659 INFO L93 Difference]: Finished difference Result 3671 states and 15256 transitions. [2021-06-05 15:04:20,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:20,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:20,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:20,666 INFO L225 Difference]: With dead ends: 3671 [2021-06-05 15:04:20,666 INFO L226 Difference]: Without dead ends: 3656 [2021-06-05 15:04:20,666 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 797.8ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:20,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3656 states. [2021-06-05 15:04:20,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3656 to 3394. [2021-06-05 15:04:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3394 states, 3393 states have (on average 4.181255526083112) internal successors, (14187), 3393 states have internal predecessors, (14187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3394 states to 3394 states and 14187 transitions. [2021-06-05 15:04:20,709 INFO L78 Accepts]: Start accepts. Automaton has 3394 states and 14187 transitions. Word has length 23 [2021-06-05 15:04:20,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:20,709 INFO L482 AbstractCegarLoop]: Abstraction has 3394 states and 14187 transitions. [2021-06-05 15:04:20,709 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:20,709 INFO L276 IsEmpty]: Start isEmpty. Operand 3394 states and 14187 transitions. [2021-06-05 15:04:20,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:20,713 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:20,713 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:20,914 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:20,914 INFO L430 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:20,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:20,914 INFO L82 PathProgramCache]: Analyzing trace with hash -595164545, now seen corresponding path program 5 times [2021-06-05 15:04:20,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:20,914 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538705295] [2021-06-05 15:04:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:20,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:21,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,013 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:21,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538705295] [2021-06-05 15:04:21,013 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538705295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,013 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [390919406] [2021-06-05 15:04:21,013 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:21,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:21,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:21,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:21,038 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:21,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:21,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:21,138 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:21,148 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:21,149 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:21,149 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:21,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:21,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [390919406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:21,212 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:21,212 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:21,212 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578252719] [2021-06-05 15:04:21,212 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:21,212 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:21,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:21,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:21,212 INFO L87 Difference]: Start difference. First operand 3394 states and 14187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:21,818 INFO L93 Difference]: Finished difference Result 3711 states and 15412 transitions. [2021-06-05 15:04:21,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:21,818 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:21,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:21,824 INFO L225 Difference]: With dead ends: 3711 [2021-06-05 15:04:21,824 INFO L226 Difference]: Without dead ends: 3696 [2021-06-05 15:04:21,824 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 510.2ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:21,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3696 states. [2021-06-05 15:04:21,857 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3696 to 3386. [2021-06-05 15:04:21,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3386 states, 3385 states have (on average 4.18109305760709) internal successors, (14153), 3385 states have internal predecessors, (14153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3386 states to 3386 states and 14153 transitions. [2021-06-05 15:04:21,868 INFO L78 Accepts]: Start accepts. Automaton has 3386 states and 14153 transitions. Word has length 23 [2021-06-05 15:04:21,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:21,868 INFO L482 AbstractCegarLoop]: Abstraction has 3386 states and 14153 transitions. [2021-06-05 15:04:21,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:21,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3386 states and 14153 transitions. [2021-06-05 15:04:21,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:21,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:21,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:22,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,97 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,088 INFO L430 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:22,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:22,089 INFO L82 PathProgramCache]: Analyzing trace with hash 244717011, now seen corresponding path program 6 times [2021-06-05 15:04:22,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:22,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241651139] [2021-06-05 15:04:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:22,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:22,199 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,199 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:22,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241651139] [2021-06-05 15:04:22,199 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241651139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,199 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107333482] [2021-06-05 15:04:22,199 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:22,224 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:22,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:22,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:22,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:22,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:22,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:22,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:22,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:22,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:22,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:22,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:22,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1107333482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:22,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:22,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:22,395 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [92805142] [2021-06-05 15:04:22,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:22,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:22,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:22,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:22,395 INFO L87 Difference]: Start difference. First operand 3386 states and 14153 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:23,113 INFO L93 Difference]: Finished difference Result 4088 states and 16918 transitions. [2021-06-05 15:04:23,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:23,114 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:23,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:23,121 INFO L225 Difference]: With dead ends: 4088 [2021-06-05 15:04:23,121 INFO L226 Difference]: Without dead ends: 4066 [2021-06-05 15:04:23,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 610.5ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:23,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4066 states. [2021-06-05 15:04:23,159 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4066 to 3406. [2021-06-05 15:04:23,161 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3406 states, 3405 states have (on average 4.182966226138032) internal successors, (14243), 3405 states have internal predecessors, (14243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3406 states to 3406 states and 14243 transitions. [2021-06-05 15:04:23,168 INFO L78 Accepts]: Start accepts. Automaton has 3406 states and 14243 transitions. Word has length 23 [2021-06-05 15:04:23,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:23,169 INFO L482 AbstractCegarLoop]: Abstraction has 3406 states and 14243 transitions. [2021-06-05 15:04:23,169 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:23,169 INFO L276 IsEmpty]: Start isEmpty. Operand 3406 states and 14243 transitions. [2021-06-05 15:04:23,173 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:23,173 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:23,173 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:23,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,388 INFO L430 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:23,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:23,388 INFO L82 PathProgramCache]: Analyzing trace with hash 830050963, now seen corresponding path program 7 times [2021-06-05 15:04:23,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:23,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712268863] [2021-06-05 15:04:23,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:23,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,509 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:23,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712268863] [2021-06-05 15:04:23,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [712268863] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,509 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668622355] [2021-06-05 15:04:23,509 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:23,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:23,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:23,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:23,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:23,610 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:23,611 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,618 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:23,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:23,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:23,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:23,722 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [668622355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:23,722 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:23,722 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:23,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888458751] [2021-06-05 15:04:23,722 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:23,723 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:23,723 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:23,723 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:23,723 INFO L87 Difference]: Start difference. First operand 3406 states and 14243 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:24,601 INFO L93 Difference]: Finished difference Result 3955 states and 16374 transitions. [2021-06-05 15:04:24,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:24,602 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:24,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:24,609 INFO L225 Difference]: With dead ends: 3955 [2021-06-05 15:04:24,609 INFO L226 Difference]: Without dead ends: 3929 [2021-06-05 15:04:24,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 767.8ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:04:24,612 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3929 states. [2021-06-05 15:04:24,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3929 to 3410. [2021-06-05 15:04:24,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3410 states, 3409 states have (on average 4.1827515400410675) internal successors, (14259), 3409 states have internal predecessors, (14259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3410 states to 3410 states and 14259 transitions. [2021-06-05 15:04:24,654 INFO L78 Accepts]: Start accepts. Automaton has 3410 states and 14259 transitions. Word has length 23 [2021-06-05 15:04:24,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:24,654 INFO L482 AbstractCegarLoop]: Abstraction has 3410 states and 14259 transitions. [2021-06-05 15:04:24,654 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:24,654 INFO L276 IsEmpty]: Start isEmpty. Operand 3410 states and 14259 transitions. [2021-06-05 15:04:24,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:24,659 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:24,659 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:24,859 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:24,859 INFO L430 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:24,859 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:24,859 INFO L82 PathProgramCache]: Analyzing trace with hash -1851349599, now seen corresponding path program 8 times [2021-06-05 15:04:24,859 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:24,859 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865571443] [2021-06-05 15:04:24,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:24,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:24,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:24,973 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:24,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865571443] [2021-06-05 15:04:24,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865571443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:24,973 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834023047] [2021-06-05 15:04:24,973 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:24,997 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:24,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:24,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:24,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:25,077 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:25,077 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:25,078 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:25,086 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:25,086 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:25,086 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:25,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:25,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834023047] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:25,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:25,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:25,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223252500] [2021-06-05 15:04:25,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:25,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:25,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:25,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:25,169 INFO L87 Difference]: Start difference. First operand 3410 states and 14259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:26,182 INFO L93 Difference]: Finished difference Result 3935 states and 16300 transitions. [2021-06-05 15:04:26,182 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:04:26,182 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:26,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:26,188 INFO L225 Difference]: With dead ends: 3935 [2021-06-05 15:04:26,188 INFO L226 Difference]: Without dead ends: 3914 [2021-06-05 15:04:26,189 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 794.1ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:26,192 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3914 states. [2021-06-05 15:04:26,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3914 to 3402. [2021-06-05 15:04:26,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3402 states, 3401 states have (on average 4.182593354895619) internal successors, (14225), 3401 states have internal predecessors, (14225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3402 states to 3402 states and 14225 transitions. [2021-06-05 15:04:26,233 INFO L78 Accepts]: Start accepts. Automaton has 3402 states and 14225 transitions. Word has length 23 [2021-06-05 15:04:26,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:26,233 INFO L482 AbstractCegarLoop]: Abstraction has 3402 states and 14225 transitions. [2021-06-05 15:04:26,233 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:26,233 INFO L276 IsEmpty]: Start isEmpty. Operand 3402 states and 14225 transitions. [2021-06-05 15:04:26,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:26,238 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:26,238 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:26,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2021-06-05 15:04:26,438 INFO L430 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:26,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:26,439 INFO L82 PathProgramCache]: Analyzing trace with hash 594214389, now seen corresponding path program 9 times [2021-06-05 15:04:26,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:26,439 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086141603] [2021-06-05 15:04:26,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:26,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:26,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086141603] [2021-06-05 15:04:26,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086141603] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347367963] [2021-06-05 15:04:26,552 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:26,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:26,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:26,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:04:26,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:26,672 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:26,673 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:26,680 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:26,680 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 15:04:26,683 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:26,689 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:26,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:26,690 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:24 [2021-06-05 15:04:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:26,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347367963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:26,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:26,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:26,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008411792] [2021-06-05 15:04:26,739 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:26,739 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:26,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:26,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:26,739 INFO L87 Difference]: Start difference. First operand 3402 states and 14225 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:27,268 INFO L93 Difference]: Finished difference Result 4084 states and 16893 transitions. [2021-06-05 15:04:27,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:27,268 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:27,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:27,275 INFO L225 Difference]: With dead ends: 4084 [2021-06-05 15:04:27,275 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 15:04:27,275 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 360.2ms TimeCoverageRelationStatistics Valid=127, Invalid=685, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:27,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 15:04:27,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3417. [2021-06-05 15:04:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 4.182377049180328) internal successors, (14287), 3416 states have internal predecessors, (14287), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 14287 transitions. [2021-06-05 15:04:27,322 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 14287 transitions. Word has length 23 [2021-06-05 15:04:27,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:27,322 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 14287 transitions. [2021-06-05 15:04:27,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:27,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 14287 transitions. [2021-06-05 15:04:27,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:27,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:27,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:27,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:27,527 INFO L430 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:27,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:27,528 INFO L82 PathProgramCache]: Analyzing trace with hash 675613445, now seen corresponding path program 10 times [2021-06-05 15:04:27,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:27,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325505920] [2021-06-05 15:04:27,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:27,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:27,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:27,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325505920] [2021-06-05 15:04:27,643 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325505920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,643 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1451551780] [2021-06-05 15:04:27,643 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:27,670 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:27,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:27,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:27,671 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:27,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:27,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:27,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:27,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:27,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:27,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:27,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:27,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1451551780] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:27,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:27,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:27,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992207467] [2021-06-05 15:04:27,836 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:27,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:27,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:27,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:27,836 INFO L87 Difference]: Start difference. First operand 3417 states and 14287 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:28,716 INFO L93 Difference]: Finished difference Result 3968 states and 16422 transitions. [2021-06-05 15:04:28,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:28,716 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:28,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:28,723 INFO L225 Difference]: With dead ends: 3968 [2021-06-05 15:04:28,723 INFO L226 Difference]: Without dead ends: 3942 [2021-06-05 15:04:28,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 833.7ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:04:28,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3942 states. [2021-06-05 15:04:28,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3942 to 3421. [2021-06-05 15:04:28,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 4.182163742690059) internal successors, (14303), 3420 states have internal predecessors, (14303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 14303 transitions. [2021-06-05 15:04:28,769 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 14303 transitions. Word has length 23 [2021-06-05 15:04:28,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:28,769 INFO L482 AbstractCegarLoop]: Abstraction has 3421 states and 14303 transitions. [2021-06-05 15:04:28,769 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:28,769 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 14303 transitions. [2021-06-05 15:04:28,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:28,774 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:28,774 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:28,975 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2021-06-05 15:04:28,975 INFO L430 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:28,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:28,975 INFO L82 PathProgramCache]: Analyzing trace with hash -2005787117, now seen corresponding path program 11 times [2021-06-05 15:04:28,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:28,975 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513108577] [2021-06-05 15:04:28,975 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:28,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:29,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:29,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:29,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513108577] [2021-06-05 15:04:29,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1513108577] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [107553351] [2021-06-05 15:04:29,111 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:29,137 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:29,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:29,138 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:04:29,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:29,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:29,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 15:04:29,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:29,260 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:29,262 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:29,262 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 15:04:29,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:29,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [107553351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:29,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:29,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:04:29,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1217825759] [2021-06-05 15:04:29,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:04:29,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:29,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:04:29,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:29,312 INFO L87 Difference]: Start difference. First operand 3421 states and 14303 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:29,826 INFO L93 Difference]: Finished difference Result 3940 states and 16315 transitions. [2021-06-05 15:04:29,826 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:29,826 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:29,826 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:29,833 INFO L225 Difference]: With dead ends: 3940 [2021-06-05 15:04:29,833 INFO L226 Difference]: Without dead ends: 3919 [2021-06-05 15:04:29,834 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 413.1ms TimeCoverageRelationStatistics Valid=162, Invalid=650, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:04:29,837 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3919 states. [2021-06-05 15:04:29,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3919 to 3409. [2021-06-05 15:04:29,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3409 states, 3408 states have (on average 4.181044600938967) internal successors, (14249), 3408 states have internal predecessors, (14249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3409 states to 3409 states and 14249 transitions. [2021-06-05 15:04:29,879 INFO L78 Accepts]: Start accepts. Automaton has 3409 states and 14249 transitions. Word has length 23 [2021-06-05 15:04:29,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:29,879 INFO L482 AbstractCegarLoop]: Abstraction has 3409 states and 14249 transitions. [2021-06-05 15:04:29,879 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:29,879 INFO L276 IsEmpty]: Start isEmpty. Operand 3409 states and 14249 transitions. [2021-06-05 15:04:29,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:29,884 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:29,884 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:30,087 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:30,088 INFO L430 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:30,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:30,088 INFO L82 PathProgramCache]: Analyzing trace with hash 1159798499, now seen corresponding path program 12 times [2021-06-05 15:04:30,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:30,088 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431016035] [2021-06-05 15:04:30,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:30,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:30,195 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:30,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431016035] [2021-06-05 15:04:30,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431016035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,195 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912431872] [2021-06-05 15:04:30,195 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:30,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:30,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:30,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:30,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:30,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:30,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:30,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:30,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:30,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:30,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:30,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [912431872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:30,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:30,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:30,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030038739] [2021-06-05 15:04:30,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:30,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:30,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:30,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:30,393 INFO L87 Difference]: Start difference. First operand 3409 states and 14249 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:31,005 INFO L93 Difference]: Finished difference Result 3908 states and 16196 transitions. [2021-06-05 15:04:31,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:31,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:31,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:31,012 INFO L225 Difference]: With dead ends: 3908 [2021-06-05 15:04:31,012 INFO L226 Difference]: Without dead ends: 3886 [2021-06-05 15:04:31,012 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 522.7ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:31,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3886 states. [2021-06-05 15:04:31,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3886 to 3417. [2021-06-05 15:04:31,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3417 states, 3416 states have (on average 4.181206088992974) internal successors, (14283), 3416 states have internal predecessors, (14283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3417 states to 3417 states and 14283 transitions. [2021-06-05 15:04:31,056 INFO L78 Accepts]: Start accepts. Automaton has 3417 states and 14283 transitions. Word has length 23 [2021-06-05 15:04:31,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:31,057 INFO L482 AbstractCegarLoop]: Abstraction has 3417 states and 14283 transitions. [2021-06-05 15:04:31,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:31,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3417 states and 14283 transitions. [2021-06-05 15:04:31,061 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:31,061 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:31,061 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:31,261 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:31,262 INFO L430 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:31,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:31,262 INFO L82 PathProgramCache]: Analyzing trace with hash 1745132451, now seen corresponding path program 13 times [2021-06-05 15:04:31,262 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:31,262 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1239981767] [2021-06-05 15:04:31,262 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:31,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:31,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:31,390 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:31,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1239981767] [2021-06-05 15:04:31,390 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1239981767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:31,390 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280626465] [2021-06-05 15:04:31,390 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:31,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:31,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:31,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:31,495 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:31,495 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:31,496 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:31,504 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:31,505 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:31,505 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:31,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:31,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280626465] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:31,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:31,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:31,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620809727] [2021-06-05 15:04:31,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:31,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:31,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:31,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:31,588 INFO L87 Difference]: Start difference. First operand 3417 states and 14283 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:32,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:32,338 INFO L93 Difference]: Finished difference Result 3820 states and 15834 transitions. [2021-06-05 15:04:32,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:32,338 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:32,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:32,345 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 15:04:32,345 INFO L226 Difference]: Without dead ends: 3794 [2021-06-05 15:04:32,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 704.2ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:04:32,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3794 states. [2021-06-05 15:04:32,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3794 to 3421. [2021-06-05 15:04:32,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3421 states, 3420 states have (on average 4.180994152046783) internal successors, (14299), 3420 states have internal predecessors, (14299), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:32,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3421 states to 3421 states and 14299 transitions. [2021-06-05 15:04:32,388 INFO L78 Accepts]: Start accepts. Automaton has 3421 states and 14299 transitions. Word has length 23 [2021-06-05 15:04:32,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:32,388 INFO L482 AbstractCegarLoop]: Abstraction has 3421 states and 14299 transitions. [2021-06-05 15:04:32,388 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:32,388 INFO L276 IsEmpty]: Start isEmpty. Operand 3421 states and 14299 transitions. [2021-06-05 15:04:32,393 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:32,393 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:32,393 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:32,593 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2021-06-05 15:04:32,593 INFO L430 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:32,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:32,594 INFO L82 PathProgramCache]: Analyzing trace with hash -936268111, now seen corresponding path program 14 times [2021-06-05 15:04:32,594 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:32,594 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824110964] [2021-06-05 15:04:32,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:32,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:32,707 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:32,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824110964] [2021-06-05 15:04:32,708 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824110964] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:32,708 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1285089070] [2021-06-05 15:04:32,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:32,732 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:32,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:32,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:32,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:32,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:32,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:32,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:32,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:32,844 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:32,844 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:32,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:32,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1285089070] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:32,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:32,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:32,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1268044229] [2021-06-05 15:04:32,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:32,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:32,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:32,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:32,926 INFO L87 Difference]: Start difference. First operand 3421 states and 14299 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:33,744 INFO L93 Difference]: Finished difference Result 3796 states and 15744 transitions. [2021-06-05 15:04:33,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:33,745 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:33,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:33,752 INFO L225 Difference]: With dead ends: 3796 [2021-06-05 15:04:33,752 INFO L226 Difference]: Without dead ends: 3775 [2021-06-05 15:04:33,752 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 701.2ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:04:33,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3775 states. [2021-06-05 15:04:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3775 to 3413. [2021-06-05 15:04:33,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3413 states, 3412 states have (on average 4.180832356389215) internal successors, (14265), 3412 states have internal predecessors, (14265), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3413 states to 3413 states and 14265 transitions. [2021-06-05 15:04:33,797 INFO L78 Accepts]: Start accepts. Automaton has 3413 states and 14265 transitions. Word has length 23 [2021-06-05 15:04:33,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:33,797 INFO L482 AbstractCegarLoop]: Abstraction has 3413 states and 14265 transitions. [2021-06-05 15:04:33,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:33,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3413 states and 14265 transitions. [2021-06-05 15:04:33,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:33,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:33,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:34,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2021-06-05 15:04:34,002 INFO L430 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1314236017, now seen corresponding path program 15 times [2021-06-05 15:04:34,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:34,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988068608] [2021-06-05 15:04:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:34,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:34,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:34,107 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:34,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988068608] [2021-06-05 15:04:34,107 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988068608] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,107 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753247789] [2021-06-05 15:04:34,108 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:34,133 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:34,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:34,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:04:34,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:34,270 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:04:34,271 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 15:04:34,275 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,288 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 15:04:34,288 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:34,288 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 15:04:34,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:34,326 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753247789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:34,326 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:34,326 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:34,326 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615348727] [2021-06-05 15:04:34,326 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:34,326 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:34,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:34,327 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:34,327 INFO L87 Difference]: Start difference. First operand 3413 states and 14265 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:34,791 INFO L93 Difference]: Finished difference Result 3707 states and 15400 transitions. [2021-06-05 15:04:34,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:34,791 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:34,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:34,797 INFO L225 Difference]: With dead ends: 3707 [2021-06-05 15:04:34,797 INFO L226 Difference]: Without dead ends: 3684 [2021-06-05 15:04:34,797 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 379.7ms TimeCoverageRelationStatistics Valid=111, Invalid=759, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:34,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3684 states. [2021-06-05 15:04:34,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3684 to 3401. [2021-06-05 15:04:34,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3401 states, 3400 states have (on average 4.179705882352941) internal successors, (14211), 3400 states have internal predecessors, (14211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,840 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3401 states to 3401 states and 14211 transitions. [2021-06-05 15:04:34,841 INFO L78 Accepts]: Start accepts. Automaton has 3401 states and 14211 transitions. Word has length 23 [2021-06-05 15:04:34,841 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:34,841 INFO L482 AbstractCegarLoop]: Abstraction has 3401 states and 14211 transitions. [2021-06-05 15:04:34,841 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:34,841 INFO L276 IsEmpty]: Start isEmpty. Operand 3401 states and 14211 transitions. [2021-06-05 15:04:34,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:34,845 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:34,845 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:35,045 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:35,046 INFO L430 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:35,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:35,046 INFO L82 PathProgramCache]: Analyzing trace with hash -924097361, now seen corresponding path program 7 times [2021-06-05 15:04:35,046 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:35,046 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522565001] [2021-06-05 15:04:35,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:35,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:35,179 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:35,179 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522565001] [2021-06-05 15:04:35,179 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522565001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,179 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [155324173] [2021-06-05 15:04:35,179 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:35,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:35,210 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:35,211 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:35,307 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:35,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:35,308 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:35,316 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:35,321 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:35,321 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:35,381 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:35,382 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [155324173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:35,382 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:35,382 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:35,382 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849487299] [2021-06-05 15:04:35,382 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:35,382 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:35,382 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:35,382 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:35,382 INFO L87 Difference]: Start difference. First operand 3401 states and 14211 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:35,921 INFO L93 Difference]: Finished difference Result 3778 states and 15679 transitions. [2021-06-05 15:04:35,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:35,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:35,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:35,928 INFO L225 Difference]: With dead ends: 3778 [2021-06-05 15:04:35,928 INFO L226 Difference]: Without dead ends: 3761 [2021-06-05 15:04:35,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 471.7ms TimeCoverageRelationStatistics Valid=133, Invalid=623, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:04:35,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3761 states. [2021-06-05 15:04:35,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3761 to 3433. [2021-06-05 15:04:35,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3433 states, 3432 states have (on average 4.181235431235431) internal successors, (14350), 3432 states have internal predecessors, (14350), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3433 states to 3433 states and 14350 transitions. [2021-06-05 15:04:35,972 INFO L78 Accepts]: Start accepts. Automaton has 3433 states and 14350 transitions. Word has length 23 [2021-06-05 15:04:35,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:35,972 INFO L482 AbstractCegarLoop]: Abstraction has 3433 states and 14350 transitions. [2021-06-05 15:04:35,972 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:35,972 INFO L276 IsEmpty]: Start isEmpty. Operand 3433 states and 14350 transitions. [2021-06-05 15:04:35,977 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:35,977 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:35,977 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:36,177 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,108 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:36,177 INFO L430 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:36,177 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:36,178 INFO L82 PathProgramCache]: Analyzing trace with hash -1346031629, now seen corresponding path program 8 times [2021-06-05 15:04:36,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:36,178 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311020906] [2021-06-05 15:04:36,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:36,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:36,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311020906] [2021-06-05 15:04:36,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311020906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:36,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [191181948] [2021-06-05 15:04:36,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:36,310 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:36,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:36,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:04:36,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:36,406 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:36,407 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:36,407 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:36,414 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:36,414 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 33 [2021-06-05 15:04:36,419 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:04:36,446 INFO L628 ElimStorePlain]: treesize reduction 6, result has 87.5 percent of original size [2021-06-05 15:04:36,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:36,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:42 [2021-06-05 15:04:36,518 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:36,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [191181948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:36,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:36,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:04:36,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95733199] [2021-06-05 15:04:36,519 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:04:36,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:36,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:04:36,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:04:36,519 INFO L87 Difference]: Start difference. First operand 3433 states and 14350 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:36,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:36,992 INFO L93 Difference]: Finished difference Result 3990 states and 16510 transitions. [2021-06-05 15:04:36,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:04:36,993 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:36,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:37,000 INFO L225 Difference]: With dead ends: 3990 [2021-06-05 15:04:37,000 INFO L226 Difference]: Without dead ends: 3949 [2021-06-05 15:04:37,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:04:37,003 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3949 states. [2021-06-05 15:04:37,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3949 to 3469. [2021-06-05 15:04:37,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3469 states, 3468 states have (on average 4.1833910034602075) internal successors, (14508), 3468 states have internal predecessors, (14508), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3469 states to 3469 states and 14508 transitions. [2021-06-05 15:04:37,047 INFO L78 Accepts]: Start accepts. Automaton has 3469 states and 14508 transitions. Word has length 23 [2021-06-05 15:04:37,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:37,047 INFO L482 AbstractCegarLoop]: Abstraction has 3469 states and 14508 transitions. [2021-06-05 15:04:37,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:37,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3469 states and 14508 transitions. [2021-06-05 15:04:37,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:37,051 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:37,052 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:37,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable210,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,252 INFO L430 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:37,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:37,252 INFO L82 PathProgramCache]: Analyzing trace with hash 2042774707, now seen corresponding path program 9 times [2021-06-05 15:04:37,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:37,252 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881535673] [2021-06-05 15:04:37,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:37,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:37,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,393 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:37,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881535673] [2021-06-05 15:04:37,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881535673] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,393 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119630159] [2021-06-05 15:04:37,393 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:37,419 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:04:37,419 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:37,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:04:37,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:37,531 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:04:37,532 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:04:37,533 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:37,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:37,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 15:04:37,628 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:37,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119630159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:37,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:37,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:37,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807450730] [2021-06-05 15:04:37,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:37,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:37,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:37,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:37,629 INFO L87 Difference]: Start difference. First operand 3469 states and 14508 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:38,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:38,531 INFO L93 Difference]: Finished difference Result 4269 states and 17622 transitions. [2021-06-05 15:04:38,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:38,531 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:38,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:38,538 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 15:04:38,538 INFO L226 Difference]: Without dead ends: 4213 [2021-06-05 15:04:38,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 697.1ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:04:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-06-05 15:04:38,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3492. [2021-06-05 15:04:38,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3492 states, 3491 states have (on average 4.182182755657405) internal successors, (14600), 3491 states have internal predecessors, (14600), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:38,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3492 states to 3492 states and 14600 transitions. [2021-06-05 15:04:38,585 INFO L78 Accepts]: Start accepts. Automaton has 3492 states and 14600 transitions. Word has length 23 [2021-06-05 15:04:38,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:38,585 INFO L482 AbstractCegarLoop]: Abstraction has 3492 states and 14600 transitions. [2021-06-05 15:04:38,585 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:38,585 INFO L276 IsEmpty]: Start isEmpty. Operand 3492 states and 14600 transitions. [2021-06-05 15:04:38,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:38,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:38,590 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:38,790 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2021-06-05 15:04:38,790 INFO L430 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:38,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:38,790 INFO L82 PathProgramCache]: Analyzing trace with hash -1176481433, now seen corresponding path program 10 times [2021-06-05 15:04:38,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:38,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [638719154] [2021-06-05 15:04:38,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:38,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:38,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:38,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [638719154] [2021-06-05 15:04:38,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [638719154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:38,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715401674] [2021-06-05 15:04:38,927 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:38,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:38,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:38,951 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:38,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:39,031 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:39,031 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:39,032 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:39,040 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:39,041 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:39,041 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:39,122 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:39,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1715401674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:39,123 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:39,123 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:39,123 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1594017409] [2021-06-05 15:04:39,123 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:39,123 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:39,123 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:39,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:39,123 INFO L87 Difference]: Start difference. First operand 3492 states and 14600 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:39,907 INFO L93 Difference]: Finished difference Result 3951 states and 16393 transitions. [2021-06-05 15:04:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:39,914 INFO L225 Difference]: With dead ends: 3951 [2021-06-05 15:04:39,914 INFO L226 Difference]: Without dead ends: 3928 [2021-06-05 15:04:39,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 688.8ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:04:39,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3928 states. [2021-06-05 15:04:39,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3928 to 3486. [2021-06-05 15:04:39,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3486 states, 3485 states have (on average 4.182496413199426) internal successors, (14576), 3485 states have internal predecessors, (14576), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3486 states to 3486 states and 14576 transitions. [2021-06-05 15:04:39,959 INFO L78 Accepts]: Start accepts. Automaton has 3486 states and 14576 transitions. Word has length 23 [2021-06-05 15:04:39,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:39,959 INFO L482 AbstractCegarLoop]: Abstraction has 3486 states and 14576 transitions. [2021-06-05 15:04:39,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:39,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3486 states and 14576 transitions. [2021-06-05 15:04:39,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:39,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:39,964 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:40,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2021-06-05 15:04:40,164 INFO L430 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:40,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:40,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1620238247, now seen corresponding path program 11 times [2021-06-05 15:04:40,165 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:40,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2026243690] [2021-06-05 15:04:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:40,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:40,286 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:40,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:40,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2026243690] [2021-06-05 15:04:40,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2026243690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445272834] [2021-06-05 15:04:40,286 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:40,312 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:40,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:40,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:40,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:40,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:40,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:40,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:40,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:40,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:40,478 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:40,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445272834] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:40,478 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:40,478 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:40,478 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667532878] [2021-06-05 15:04:40,478 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:40,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:40,478 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:40,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:40,479 INFO L87 Difference]: Start difference. First operand 3486 states and 14576 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:41,072 INFO L93 Difference]: Finished difference Result 4019 states and 16669 transitions. [2021-06-05 15:04:41,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:04:41,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:41,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:41,079 INFO L225 Difference]: With dead ends: 4019 [2021-06-05 15:04:41,080 INFO L226 Difference]: Without dead ends: 3994 [2021-06-05 15:04:41,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 501.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:41,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-06-05 15:04:41,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3490. [2021-06-05 15:04:41,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3490 states, 3489 states have (on average 4.182287188306105) internal successors, (14592), 3489 states have internal predecessors, (14592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3490 states to 3490 states and 14592 transitions. [2021-06-05 15:04:41,125 INFO L78 Accepts]: Start accepts. Automaton has 3490 states and 14592 transitions. Word has length 23 [2021-06-05 15:04:41,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:41,125 INFO L482 AbstractCegarLoop]: Abstraction has 3490 states and 14592 transitions. [2021-06-05 15:04:41,125 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:41,125 INFO L276 IsEmpty]: Start isEmpty. Operand 3490 states and 14592 transitions. [2021-06-05 15:04:41,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:41,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:41,130 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:41,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2021-06-05 15:04:41,331 INFO L430 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:41,331 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:41,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1605375419, now seen corresponding path program 12 times [2021-06-05 15:04:41,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:41,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682639697] [2021-06-05 15:04:41,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:41,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:41,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:41,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682639697] [2021-06-05 15:04:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1682639697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59228452] [2021-06-05 15:04:41,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:41,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:04:41,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:41,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:41,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:41,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:41,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:41,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:41,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:41,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:41,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:41,634 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:41,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59228452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:41,634 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:41,634 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:41,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [791233437] [2021-06-05 15:04:41,634 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:41,634 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:41,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:41,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:41,634 INFO L87 Difference]: Start difference. First operand 3490 states and 14592 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:42,339 INFO L93 Difference]: Finished difference Result 4384 states and 18075 transitions. [2021-06-05 15:04:42,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:42,339 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:42,339 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:42,347 INFO L225 Difference]: With dead ends: 4384 [2021-06-05 15:04:42,347 INFO L226 Difference]: Without dead ends: 4349 [2021-06-05 15:04:42,347 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 524.7ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:42,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-06-05 15:04:42,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3518. [2021-06-05 15:04:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3518 states, 3517 states have (on average 4.182541939152687) internal successors, (14710), 3517 states have internal predecessors, (14710), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3518 states to 3518 states and 14710 transitions. [2021-06-05 15:04:42,397 INFO L78 Accepts]: Start accepts. Automaton has 3518 states and 14710 transitions. Word has length 23 [2021-06-05 15:04:42,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:42,397 INFO L482 AbstractCegarLoop]: Abstraction has 3518 states and 14710 transitions. [2021-06-05 15:04:42,397 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:42,397 INFO L276 IsEmpty]: Start isEmpty. Operand 3518 states and 14710 transitions. [2021-06-05 15:04:42,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:42,402 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:42,402 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:42,602 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2021-06-05 15:04:42,602 INFO L430 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:42,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:42,602 INFO L82 PathProgramCache]: Analyzing trace with hash -2101846555, now seen corresponding path program 13 times [2021-06-05 15:04:42,602 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:42,602 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342731606] [2021-06-05 15:04:42,602 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:42,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:42,718 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:42,718 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:42,718 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342731606] [2021-06-05 15:04:42,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342731606] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174686681] [2021-06-05 15:04:42,719 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:42,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:42,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:42,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:42,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:42,818 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,826 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:42,826 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:42,826 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:42,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:42,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174686681] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:42,906 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:42,906 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:42,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023271814] [2021-06-05 15:04:42,906 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:42,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:42,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:42,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:42,906 INFO L87 Difference]: Start difference. First operand 3518 states and 14710 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:43,611 INFO L93 Difference]: Finished difference Result 4183 states and 17298 transitions. [2021-06-05 15:04:43,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:43,612 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:43,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:43,619 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 15:04:43,619 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 15:04:43,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 642.9ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:43,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 15:04:43,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3524. [2021-06-05 15:04:43,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3524 states, 3523 states have (on average 4.182231053079762) internal successors, (14734), 3523 states have internal predecessors, (14734), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3524 states to 3524 states and 14734 transitions. [2021-06-05 15:04:43,669 INFO L78 Accepts]: Start accepts. Automaton has 3524 states and 14734 transitions. Word has length 23 [2021-06-05 15:04:43,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:43,669 INFO L482 AbstractCegarLoop]: Abstraction has 3524 states and 14734 transitions. [2021-06-05 15:04:43,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:43,669 INFO L276 IsEmpty]: Start isEmpty. Operand 3524 states and 14734 transitions. [2021-06-05 15:04:43,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:43,674 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:43,674 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:43,874 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2021-06-05 15:04:43,874 INFO L430 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:43,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:43,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1026135399, now seen corresponding path program 14 times [2021-06-05 15:04:43,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:43,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814197732] [2021-06-05 15:04:43,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:43,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:44,027 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814197732] [2021-06-05 15:04:44,027 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1814197732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1294725725] [2021-06-05 15:04:44,027 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:44,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:44,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:44,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:44,062 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:44,138 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:44,138 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:44,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:44,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:44,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:44,226 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:44,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1294725725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:44,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:44,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:44,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1283363080] [2021-06-05 15:04:44,227 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:44,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:44,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:44,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:44,227 INFO L87 Difference]: Start difference. First operand 3524 states and 14734 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:45,051 INFO L93 Difference]: Finished difference Result 4150 states and 17172 transitions. [2021-06-05 15:04:45,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:45,051 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:45,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:45,059 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 15:04:45,059 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 15:04:45,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 633.2ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:45,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 15:04:45,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3528. [2021-06-05 15:04:45,098 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3528 states, 3527 states have (on average 4.182024383328608) internal successors, (14750), 3527 states have internal predecessors, (14750), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3528 states to 3528 states and 14750 transitions. [2021-06-05 15:04:45,106 INFO L78 Accepts]: Start accepts. Automaton has 3528 states and 14750 transitions. Word has length 23 [2021-06-05 15:04:45,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:45,106 INFO L482 AbstractCegarLoop]: Abstraction has 3528 states and 14750 transitions. [2021-06-05 15:04:45,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:45,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3528 states and 14750 transitions. [2021-06-05 15:04:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:45,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:45,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:45,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable225,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:45,312 INFO L430 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash -181439147, now seen corresponding path program 15 times [2021-06-05 15:04:45,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:45,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375274339] [2021-06-05 15:04:45,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:45,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:45,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:45,428 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:45,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375274339] [2021-06-05 15:04:45,428 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1375274339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,428 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339400062] [2021-06-05 15:04:45,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:45,453 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:45,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:45,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:04:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:45,574 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:04:45,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 66 [2021-06-05 15:04:45,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:45,585 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:45,585 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:45,585 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 15:04:45,620 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:45,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339400062] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:45,620 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:45,620 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:04:45,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511854002] [2021-06-05 15:04:45,621 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:04:45,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:45,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:04:45,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:04:45,621 INFO L87 Difference]: Start difference. First operand 3528 states and 14750 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:46,264 INFO L93 Difference]: Finished difference Result 4348 states and 17995 transitions. [2021-06-05 15:04:46,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:04:46,265 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:46,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:46,273 INFO L225 Difference]: With dead ends: 4348 [2021-06-05 15:04:46,273 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 15:04:46,274 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 254 ImplicationChecksByTransitivity, 453.4ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:04:46,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 15:04:46,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3552. [2021-06-05 15:04:46,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3552 states, 3551 states have (on average 4.18445508307519) internal successors, (14859), 3551 states have internal predecessors, (14859), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3552 states to 3552 states and 14859 transitions. [2021-06-05 15:04:46,327 INFO L78 Accepts]: Start accepts. Automaton has 3552 states and 14859 transitions. Word has length 23 [2021-06-05 15:04:46,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:46,327 INFO L482 AbstractCegarLoop]: Abstraction has 3552 states and 14859 transitions. [2021-06-05 15:04:46,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:46,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3552 states and 14859 transitions. [2021-06-05 15:04:46,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:46,332 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:46,332 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:46,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2021-06-05 15:04:46,533 INFO L430 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:46,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:46,533 INFO L82 PathProgramCache]: Analyzing trace with hash -1087600107, now seen corresponding path program 16 times [2021-06-05 15:04:46,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:46,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822574276] [2021-06-05 15:04:46,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:46,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:46,661 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,661 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:46,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822574276] [2021-06-05 15:04:46,661 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822574276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,661 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [844025450] [2021-06-05 15:04:46,661 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:46,687 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:46,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:46,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:46,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:46,770 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:46,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:46,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:46,781 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:46,781 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:46,782 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:46,867 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:46,867 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [844025450] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:46,867 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:46,867 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:46,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1187436748] [2021-06-05 15:04:46,868 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:46,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:46,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:46,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:46,868 INFO L87 Difference]: Start difference. First operand 3552 states and 14859 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:47,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:47,566 INFO L93 Difference]: Finished difference Result 4096 states and 16971 transitions. [2021-06-05 15:04:47,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:47,566 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:47,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:47,573 INFO L225 Difference]: With dead ends: 4096 [2021-06-05 15:04:47,573 INFO L226 Difference]: Without dead ends: 4068 [2021-06-05 15:04:47,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 625.6ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4068 states. [2021-06-05 15:04:47,610 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4068 to 3558. [2021-06-05 15:04:47,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3558 states, 3557 states have (on average 4.184143941523756) internal successors, (14883), 3557 states have internal predecessors, (14883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:47,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3558 states to 3558 states and 14883 transitions. [2021-06-05 15:04:47,621 INFO L78 Accepts]: Start accepts. Automaton has 3558 states and 14883 transitions. Word has length 23 [2021-06-05 15:04:47,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:47,621 INFO L482 AbstractCegarLoop]: Abstraction has 3558 states and 14883 transitions. [2021-06-05 15:04:47,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:47,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3558 states and 14883 transitions. [2021-06-05 15:04:47,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:47,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:47,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:47,840 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:47,841 INFO L430 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:47,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:47,841 INFO L82 PathProgramCache]: Analyzing trace with hash -11888951, now seen corresponding path program 17 times [2021-06-05 15:04:47,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:47,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271929626] [2021-06-05 15:04:47,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:47,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:47,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271929626] [2021-06-05 15:04:47,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271929626] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:47,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037376790] [2021-06-05 15:04:47,955 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:47,980 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:47,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:47,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:47,981 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:48,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:48,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:48,053 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:48,060 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:48,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:48,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:48,139 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:48,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037376790] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:48,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:48,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:48,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [711509276] [2021-06-05 15:04:48,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:48,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:48,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:48,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:48,140 INFO L87 Difference]: Start difference. First operand 3558 states and 14883 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:48,849 INFO L93 Difference]: Finished difference Result 4117 states and 17059 transitions. [2021-06-05 15:04:48,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:48,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:48,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:48,856 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 15:04:48,856 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 15:04:48,856 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 581.6ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:48,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 15:04:48,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3546. [2021-06-05 15:04:48,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3546 states, 3545 states have (on average 4.18392101551481) internal successors, (14832), 3545 states have internal predecessors, (14832), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3546 states to 3546 states and 14832 transitions. [2021-06-05 15:04:48,902 INFO L78 Accepts]: Start accepts. Automaton has 3546 states and 14832 transitions. Word has length 23 [2021-06-05 15:04:48,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:48,902 INFO L482 AbstractCegarLoop]: Abstraction has 3546 states and 14832 transitions. [2021-06-05 15:04:48,902 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:48,902 INFO L276 IsEmpty]: Start isEmpty. Operand 3546 states and 14832 transitions. [2021-06-05 15:04:48,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:48,907 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:48,907 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:49,107 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2021-06-05 15:04:49,107 INFO L430 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:49,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:49,108 INFO L82 PathProgramCache]: Analyzing trace with hash -346648009, now seen corresponding path program 18 times [2021-06-05 15:04:49,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:49,108 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1851148355] [2021-06-05 15:04:49,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:49,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:49,215 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:49,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1851148355] [2021-06-05 15:04:49,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1851148355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,216 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1802707497] [2021-06-05 15:04:49,216 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:49,240 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:49,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:49,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:49,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:49,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:49,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:49,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:49,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:49,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:49,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:49,393 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:49,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1802707497] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:49,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:49,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:49,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562195710] [2021-06-05 15:04:49,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:49,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:49,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:49,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:49,394 INFO L87 Difference]: Start difference. First operand 3546 states and 14832 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:50,119 INFO L93 Difference]: Finished difference Result 4439 states and 18330 transitions. [2021-06-05 15:04:50,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:50,120 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:50,120 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:50,127 INFO L225 Difference]: With dead ends: 4439 [2021-06-05 15:04:50,127 INFO L226 Difference]: Without dead ends: 4408 [2021-06-05 15:04:50,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 555.1ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:50,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4408 states. [2021-06-05 15:04:50,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4408 to 3563. [2021-06-05 15:04:50,171 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3563 states, 3562 states have (on average 4.1869736103312745) internal successors, (14914), 3562 states have internal predecessors, (14914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3563 states to 3563 states and 14914 transitions. [2021-06-05 15:04:50,178 INFO L78 Accepts]: Start accepts. Automaton has 3563 states and 14914 transitions. Word has length 23 [2021-06-05 15:04:50,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:50,179 INFO L482 AbstractCegarLoop]: Abstraction has 3563 states and 14914 transitions. [2021-06-05 15:04:50,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:50,179 INFO L276 IsEmpty]: Start isEmpty. Operand 3563 states and 14914 transitions. [2021-06-05 15:04:50,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:50,184 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:50,184 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:50,384 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2021-06-05 15:04:50,384 INFO L430 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:50,385 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:50,385 INFO L82 PathProgramCache]: Analyzing trace with hash 241097313, now seen corresponding path program 19 times [2021-06-05 15:04:50,385 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:50,385 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [675826623] [2021-06-05 15:04:50,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:50,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:50,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:50,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:50,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [675826623] [2021-06-05 15:04:50,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [675826623] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1891378665] [2021-06-05 15:04:50,500 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:50,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:50,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:50,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:50,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:50,621 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:50,622 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:50,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:50,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:50,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:50,705 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:50,705 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1891378665] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:50,705 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:50,705 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:50,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254685213] [2021-06-05 15:04:50,705 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:50,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:50,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:50,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:50,706 INFO L87 Difference]: Start difference. First operand 3563 states and 14914 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:51,449 INFO L93 Difference]: Finished difference Result 4196 states and 17379 transitions. [2021-06-05 15:04:51,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:04:51,450 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:51,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:51,457 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 15:04:51,457 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 15:04:51,457 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 651.7ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:04:51,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 15:04:51,494 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3569. [2021-06-05 15:04:51,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3569 states, 3568 states have (on average 4.186659192825112) internal successors, (14938), 3568 states have internal predecessors, (14938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3569 states to 3569 states and 14938 transitions. [2021-06-05 15:04:51,504 INFO L78 Accepts]: Start accepts. Automaton has 3569 states and 14938 transitions. Word has length 23 [2021-06-05 15:04:51,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:51,504 INFO L482 AbstractCegarLoop]: Abstraction has 3569 states and 14938 transitions. [2021-06-05 15:04:51,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:51,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3569 states and 14938 transitions. [2021-06-05 15:04:51,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:51,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:51,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:51,709 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:51,709 INFO L430 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:51,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:51,709 INFO L82 PathProgramCache]: Analyzing trace with hash 1316808469, now seen corresponding path program 20 times [2021-06-05 15:04:51,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:51,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278198967] [2021-06-05 15:04:51,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:51,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:51,829 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278198967] [2021-06-05 15:04:51,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278198967] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:51,829 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [66533889] [2021-06-05 15:04:51,829 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:51,853 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:51,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:51,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:51,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:51,926 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:51,926 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:51,927 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:51,935 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:51,935 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:51,935 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:52,023 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:52,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [66533889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:52,023 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:52,023 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:52,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254765879] [2021-06-05 15:04:52,024 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:52,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:52,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:52,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:52,024 INFO L87 Difference]: Start difference. First operand 3569 states and 14938 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:52,691 INFO L93 Difference]: Finished difference Result 4238 states and 17551 transitions. [2021-06-05 15:04:52,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:04:52,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:52,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:52,699 INFO L225 Difference]: With dead ends: 4238 [2021-06-05 15:04:52,699 INFO L226 Difference]: Without dead ends: 4215 [2021-06-05 15:04:52,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 619.3ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:04:52,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-06-05 15:04:52,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3559. [2021-06-05 15:04:52,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3559 states, 3558 states have (on average 4.188026981450253) internal successors, (14901), 3558 states have internal predecessors, (14901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3559 states to 3559 states and 14901 transitions. [2021-06-05 15:04:52,766 INFO L78 Accepts]: Start accepts. Automaton has 3559 states and 14901 transitions. Word has length 23 [2021-06-05 15:04:52,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:52,766 INFO L482 AbstractCegarLoop]: Abstraction has 3559 states and 14901 transitions. [2021-06-05 15:04:52,766 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:52,766 INFO L276 IsEmpty]: Start isEmpty. Operand 3559 states and 14901 transitions. [2021-06-05 15:04:52,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:52,771 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:52,771 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:52,971 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:52,972 INFO L430 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:52,972 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:52,972 INFO L82 PathProgramCache]: Analyzing trace with hash -355517803, now seen corresponding path program 21 times [2021-06-05 15:04:52,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:52,972 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296821190] [2021-06-05 15:04:52,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:52,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,080 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:53,080 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296821190] [2021-06-05 15:04:53,081 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [296821190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,081 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578029934] [2021-06-05 15:04:53,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:53,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:04:53,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:53,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:53,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:53,205 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:53,205 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:53,206 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:53,214 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:53,214 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:53,214 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:53,274 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:53,275 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [578029934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:53,275 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:53,275 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:53,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1265394725] [2021-06-05 15:04:53,275 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:53,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:53,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:53,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:53,275 INFO L87 Difference]: Start difference. First operand 3559 states and 14901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:53,760 INFO L93 Difference]: Finished difference Result 4037 states and 16762 transitions. [2021-06-05 15:04:53,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:04:53,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:53,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:53,767 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 15:04:53,767 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 15:04:53,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 375.2ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:04:53,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 15:04:53,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3580. [2021-06-05 15:04:53,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 4.186644314054205) internal successors, (14984), 3579 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 14984 transitions. [2021-06-05 15:04:53,816 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 14984 transitions. Word has length 23 [2021-06-05 15:04:53,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:53,816 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 14984 transitions. [2021-06-05 15:04:53,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:53,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 14984 transitions. [2021-06-05 15:04:53,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:53,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:53,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:54,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,122 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:54,022 INFO L430 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:54,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:54,022 INFO L82 PathProgramCache]: Analyzing trace with hash -1684215223, now seen corresponding path program 22 times [2021-06-05 15:04:54,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:54,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123688087] [2021-06-05 15:04:54,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:54,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:54,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:54,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123688087] [2021-06-05 15:04:54,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123688087] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:54,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885685279] [2021-06-05 15:04:54,131 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:54,156 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:04:54,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:54,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:54,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:54,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:54,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:54,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:54,256 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:54,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:54,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:54,317 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:54,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1885685279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:54,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:54,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:54,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475174847] [2021-06-05 15:04:54,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:54,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:54,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:54,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:54,318 INFO L87 Difference]: Start difference. First operand 3580 states and 14984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:54,921 INFO L93 Difference]: Finished difference Result 4267 states and 17666 transitions. [2021-06-05 15:04:54,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:54,922 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:54,922 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:54,947 INFO L225 Difference]: With dead ends: 4267 [2021-06-05 15:04:54,947 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 15:04:54,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 463.2ms TimeCoverageRelationStatistics Valid=160, Invalid=770, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:04:54,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 15:04:54,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3586. [2021-06-05 15:04:54,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 4.18744769874477) internal successors, (15012), 3585 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 15012 transitions. [2021-06-05 15:04:54,995 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 15012 transitions. Word has length 23 [2021-06-05 15:04:54,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:54,995 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 15012 transitions. [2021-06-05 15:04:54,995 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:54,995 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 15012 transitions. [2021-06-05 15:04:55,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:55,000 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:55,000 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:55,200 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable243,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:55,201 INFO L430 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:55,201 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:55,201 INFO L82 PathProgramCache]: Analyzing trace with hash -1096469901, now seen corresponding path program 23 times [2021-06-05 15:04:55,201 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:55,201 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708871979] [2021-06-05 15:04:55,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:55,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:55,311 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,312 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708871979] [2021-06-05 15:04:55,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708871979] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686035275] [2021-06-05 15:04:55,312 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:55,336 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:04:55,337 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:55,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:04:55,338 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:55,411 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:04:55,411 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:04:55,416 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,416 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:04:55,417 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,424 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:55,425 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:55,425 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:04:55,483 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:55,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686035275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:55,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:55,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:55,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355251831] [2021-06-05 15:04:55,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:55,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:55,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:55,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:55,484 INFO L87 Difference]: Start difference. First operand 3586 states and 15012 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:55,896 INFO L93 Difference]: Finished difference Result 4118 states and 17067 transitions. [2021-06-05 15:04:55,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:04:55,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:55,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:55,904 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 15:04:55,904 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 15:04:55,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 359.2ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:04:55,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 15:04:55,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3592. [2021-06-05 15:04:55,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.187134502923977) internal successors, (15036), 3591 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15036 transitions. [2021-06-05 15:04:55,952 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15036 transitions. Word has length 23 [2021-06-05 15:04:55,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:55,953 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15036 transitions. [2021-06-05 15:04:55,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:55,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15036 transitions. [2021-06-05 15:04:55,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:55,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:55,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:56,158 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2021-06-05 15:04:56,158 INFO L430 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:56,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:56,158 INFO L82 PathProgramCache]: Analyzing trace with hash -20758745, now seen corresponding path program 24 times [2021-06-05 15:04:56,158 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:56,158 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [48029733] [2021-06-05 15:04:56,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:56,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:56,290 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:56,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:56,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [48029733] [2021-06-05 15:04:56,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [48029733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:56,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167927765] [2021-06-05 15:04:56,291 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:56,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:04:56,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:56,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:56,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:56,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:56,395 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:56,396 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:56,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:56,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:56,406 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:56,485 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:56,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167927765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:56,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:56,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:56,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068007842] [2021-06-05 15:04:56,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:56,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:56,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:56,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:56,486 INFO L87 Difference]: Start difference. First operand 3592 states and 15036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:57,164 INFO L93 Difference]: Finished difference Result 4150 states and 17202 transitions. [2021-06-05 15:04:57,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:57,164 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:57,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:57,171 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 15:04:57,172 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 15:04:57,172 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 643.1ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:04:57,175 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 15:04:57,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3580. [2021-06-05 15:04:57,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3580 states, 3579 states have (on average 4.186644314054205) internal successors, (14984), 3579 states have internal predecessors, (14984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3580 states to 3580 states and 14984 transitions. [2021-06-05 15:04:57,223 INFO L78 Accepts]: Start accepts. Automaton has 3580 states and 14984 transitions. Word has length 23 [2021-06-05 15:04:57,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:57,223 INFO L482 AbstractCegarLoop]: Abstraction has 3580 states and 14984 transitions. [2021-06-05 15:04:57,223 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:57,223 INFO L276 IsEmpty]: Start isEmpty. Operand 3580 states and 14984 transitions. [2021-06-05 15:04:57,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:57,228 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:57,228 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:57,428 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2021-06-05 15:04:57,429 INFO L430 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:57,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:57,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1454372855, now seen corresponding path program 25 times [2021-06-05 15:04:57,429 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:57,429 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323768510] [2021-06-05 15:04:57,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:57,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:57,555 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:57,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323768510] [2021-06-05 15:04:57,556 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323768510] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,556 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753379637] [2021-06-05 15:04:57,556 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:57,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:57,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:57,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:57,701 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:57,701 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:04:57,702 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:57,710 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:57,711 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:57,711 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:04:57,769 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:57,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753379637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:57,769 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:57,769 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:57,769 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1919675394] [2021-06-05 15:04:57,769 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:57,769 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:57,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:57,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:57,770 INFO L87 Difference]: Start difference. First operand 3580 states and 14984 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:58,337 INFO L93 Difference]: Finished difference Result 4354 states and 18034 transitions. [2021-06-05 15:04:58,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:04:58,337 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:58,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:58,345 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 15:04:58,345 INFO L226 Difference]: Without dead ends: 4330 [2021-06-05 15:04:58,345 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 454.9ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:04:58,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4330 states. [2021-06-05 15:04:58,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4330 to 3598. [2021-06-05 15:04:58,388 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.18960244648318) internal successors, (15070), 3597 states have internal predecessors, (15070), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15070 transitions. [2021-06-05 15:04:58,396 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15070 transitions. Word has length 23 [2021-06-05 15:04:58,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:58,396 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15070 transitions. [2021-06-05 15:04:58,396 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:58,396 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15070 transitions. [2021-06-05 15:04:58,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:58,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:58,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:58,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable248 [2021-06-05 15:04:58,605 INFO L430 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:58,605 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:58,605 INFO L82 PathProgramCache]: Analyzing trace with hash 1934433481, now seen corresponding path program 26 times [2021-06-05 15:04:58,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:58,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298559560] [2021-06-05 15:04:58,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:58,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:04:58,716 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:58,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:04:58,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298559560] [2021-06-05 15:04:58,717 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298559560] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:58,717 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673923887] [2021-06-05 15:04:58,717 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:58,741 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:04:58,741 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:04:58,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:04:58,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:04:58,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:58,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:04:58,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:04:58,823 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:04:58,824 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:04:58,824 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:04:58,899 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:04:58,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1673923887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:04:58,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:04:58,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:04:58,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402554005] [2021-06-05 15:04:58,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:04:58,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:04:58,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:04:58,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:04:58,900 INFO L87 Difference]: Start difference. First operand 3598 states and 15070 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:04:59,633 INFO L93 Difference]: Finished difference Result 4209 states and 17438 transitions. [2021-06-05 15:04:59,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:04:59,634 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:04:59,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:04:59,641 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 15:04:59,641 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 15:04:59,641 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 641.3ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:04:59,645 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 15:04:59,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3604. [2021-06-05 15:04:59,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.189286705523175) internal successors, (15094), 3603 states have internal predecessors, (15094), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15094 transitions. [2021-06-05 15:04:59,691 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15094 transitions. Word has length 23 [2021-06-05 15:04:59,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:04:59,691 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15094 transitions. [2021-06-05 15:04:59,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:04:59,691 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15094 transitions. [2021-06-05 15:04:59,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:04:59,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:04:59,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:04:59,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:04:59,898 INFO L430 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:04:59,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:04:59,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1284822659, now seen corresponding path program 27 times [2021-06-05 15:04:59,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:04:59,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793499942] [2021-06-05 15:04:59,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:04:59,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:00,007 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:00,007 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:00,007 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793499942] [2021-06-05 15:05:00,007 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793499942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [204585631] [2021-06-05 15:05:00,008 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:00,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:00,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:00,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:00,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:00,104 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:00,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:00,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:00,113 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:00,114 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:00,114 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:00,189 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:00,189 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [204585631] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:00,189 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:00,189 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:00,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1419296591] [2021-06-05 15:05:00,189 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:00,189 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:00,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:00,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=266, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:00,190 INFO L87 Difference]: Start difference. First operand 3604 states and 15094 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:00,752 INFO L93 Difference]: Finished difference Result 4143 states and 17189 transitions. [2021-06-05 15:05:00,752 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:05:00,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:00,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:00,759 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 15:05:00,759 INFO L226 Difference]: Without dead ends: 4120 [2021-06-05 15:05:00,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 543.0ms TimeCoverageRelationStatistics Valid=200, Invalid=792, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:00,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4120 states. [2021-06-05 15:05:00,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4120 to 3592. [2021-06-05 15:05:00,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.189083820662768) internal successors, (15043), 3591 states have internal predecessors, (15043), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15043 transitions. [2021-06-05 15:05:00,807 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15043 transitions. Word has length 23 [2021-06-05 15:05:00,807 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:00,807 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15043 transitions. [2021-06-05 15:05:00,807 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:00,807 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15043 transitions. [2021-06-05 15:05:00,812 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:00,812 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:00,812 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:01,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:01,017 INFO L430 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:01,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:01,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1619581717, now seen corresponding path program 28 times [2021-06-05 15:05:01,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:01,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363552808] [2021-06-05 15:05:01,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:01,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:01,140 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:01,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363552808] [2021-06-05 15:05:01,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363552808] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999592328] [2021-06-05 15:05:01,141 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:01,167 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:01,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:01,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:01,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:01,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:01,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:01,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:01,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:01,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:01,327 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:01,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999592328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:01,327 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:01,327 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:01,327 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578382931] [2021-06-05 15:05:01,327 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:01,327 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:01,327 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:01,328 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:01,328 INFO L87 Difference]: Start difference. First operand 3592 states and 15043 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:02,154 INFO L93 Difference]: Finished difference Result 4535 states and 18740 transitions. [2021-06-05 15:05:02,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:05:02,154 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:02,154 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:02,162 INFO L225 Difference]: With dead ends: 4535 [2021-06-05 15:05:02,162 INFO L226 Difference]: Without dead ends: 4504 [2021-06-05 15:05:02,163 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 652.2ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:05:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-06-05 15:05:02,205 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3598. [2021-06-05 15:05:02,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.189880455935501) internal successors, (15071), 3597 states have internal predecessors, (15071), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15071 transitions. [2021-06-05 15:05:02,216 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15071 transitions. Word has length 23 [2021-06-05 15:05:02,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:02,216 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15071 transitions. [2021-06-05 15:05:02,216 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:02,216 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15071 transitions. [2021-06-05 15:05:02,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:02,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:02,221 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:02,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable254 [2021-06-05 15:05:02,422 INFO L430 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:02,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:02,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1031836395, now seen corresponding path program 29 times [2021-06-05 15:05:02,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:02,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048508771] [2021-06-05 15:05:02,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:02,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:02,542 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,542 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048508771] [2021-06-05 15:05:02,542 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1048508771] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,542 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382669918] [2021-06-05 15:05:02,542 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:02,567 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:02,567 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:02,568 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:02,568 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:02,641 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:02,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:02,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,650 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:02,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:02,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:02,728 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:02,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382669918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:02,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:02,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:02,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955212430] [2021-06-05 15:05:02,729 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:02,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:02,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:02,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:02,729 INFO L87 Difference]: Start difference. First operand 3598 states and 15071 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,547 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:03,548 INFO L93 Difference]: Finished difference Result 4267 states and 17671 transitions. [2021-06-05 15:05:03,548 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:03,548 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:03,548 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:03,555 INFO L225 Difference]: With dead ends: 4267 [2021-06-05 15:05:03,555 INFO L226 Difference]: Without dead ends: 4239 [2021-06-05 15:05:03,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 705.9ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:05:03,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-06-05 15:05:03,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3604. [2021-06-05 15:05:03,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.189564252012212) internal successors, (15095), 3603 states have internal predecessors, (15095), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15095 transitions. [2021-06-05 15:05:03,604 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15095 transitions. Word has length 23 [2021-06-05 15:05:03,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:03,604 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15095 transitions. [2021-06-05 15:05:03,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:03,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15095 transitions. [2021-06-05 15:05:03,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:03,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:03,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:03,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2021-06-05 15:05:03,810 INFO L430 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:03,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:03,810 INFO L82 PathProgramCache]: Analyzing trace with hash 43874761, now seen corresponding path program 30 times [2021-06-05 15:05:03,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:03,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264001108] [2021-06-05 15:05:03,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:03,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:03,951 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:03,951 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:03,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264001108] [2021-06-05 15:05:03,951 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264001108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:03,951 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020153008] [2021-06-05 15:05:03,951 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:03,975 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:03,975 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:03,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:03,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:04,051 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:04,051 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:04,052 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:04,059 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:04,060 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:04,060 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:04,149 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020153008] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:04,149 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:04,149 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:04,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [50187425] [2021-06-05 15:05:04,149 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:04,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:04,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:04,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:04,150 INFO L87 Difference]: Start difference. First operand 3604 states and 15095 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:04,811 INFO L93 Difference]: Finished difference Result 4173 states and 17310 transitions. [2021-06-05 15:05:04,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:05:04,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:04,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:04,818 INFO L225 Difference]: With dead ends: 4173 [2021-06-05 15:05:04,819 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 15:05:04,819 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 611.3ms TimeCoverageRelationStatistics Valid=205, Invalid=787, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 15:05:04,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3586. [2021-06-05 15:05:04,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3586 states, 3585 states have (on average 4.18744769874477) internal successors, (15012), 3585 states have internal predecessors, (15012), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3586 states to 3586 states and 15012 transitions. [2021-06-05 15:05:04,867 INFO L78 Accepts]: Start accepts. Automaton has 3586 states and 15012 transitions. Word has length 23 [2021-06-05 15:05:04,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:04,867 INFO L482 AbstractCegarLoop]: Abstraction has 3586 states and 15012 transitions. [2021-06-05 15:05:04,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:04,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3586 states and 15012 transitions. [2021-06-05 15:05:04,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:04,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:04,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:05,079 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable258,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:05,079 INFO L430 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:05,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:05,080 INFO L82 PathProgramCache]: Analyzing trace with hash 728165811, now seen corresponding path program 31 times [2021-06-05 15:05:05,080 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:05,080 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608746101] [2021-06-05 15:05:05,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:05,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,183 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,183 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608746101] [2021-06-05 15:05:05,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608746101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,183 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2091073806] [2021-06-05 15:05:05,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:05,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:05,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:05,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:05,311 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:05,312 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:05,319 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:05,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:05,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:05,386 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:05,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2091073806] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:05,386 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:05,386 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:05,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [34418040] [2021-06-05 15:05:05,386 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:05,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:05,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:05,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:05,387 INFO L87 Difference]: Start difference. First operand 3586 states and 15012 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:05,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:05,867 INFO L93 Difference]: Finished difference Result 4168 states and 17295 transitions. [2021-06-05 15:05:05,867 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:05:05,868 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:05,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:05,874 INFO L225 Difference]: With dead ends: 4168 [2021-06-05 15:05:05,875 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 15:05:05,875 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 421.3ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:05:05,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 15:05:05,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3598. [2021-06-05 15:05:05,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3598 states, 3597 states have (on average 4.18765638031693) internal successors, (15063), 3597 states have internal predecessors, (15063), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:05,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3598 states to 3598 states and 15063 transitions. [2021-06-05 15:05:05,923 INFO L78 Accepts]: Start accepts. Automaton has 3598 states and 15063 transitions. Word has length 23 [2021-06-05 15:05:05,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:05,923 INFO L482 AbstractCegarLoop]: Abstraction has 3598 states and 15063 transitions. [2021-06-05 15:05:05,923 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:05,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3598 states and 15063 transitions. [2021-06-05 15:05:05,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:05,949 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:05,949 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:06,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable260,132 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:06,150 INFO L430 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:06,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:06,150 INFO L82 PathProgramCache]: Analyzing trace with hash -177995149, now seen corresponding path program 32 times [2021-06-05 15:05:06,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:06,150 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704306748] [2021-06-05 15:05:06,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:06,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:06,259 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:06,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704306748] [2021-06-05 15:05:06,259 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704306748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:06,259 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319106642] [2021-06-05 15:05:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:06,284 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:06,284 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:06,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:06,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:06,359 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:06,359 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:06,360 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:06,368 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:06,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:06,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:06,443 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:06,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319106642] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:06,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:06,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:06,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713713249] [2021-06-05 15:05:06,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:06,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:06,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:06,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:06,444 INFO L87 Difference]: Start difference. First operand 3598 states and 15063 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:07,078 INFO L93 Difference]: Finished difference Result 4118 states and 17070 transitions. [2021-06-05 15:05:07,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:05:07,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:07,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:07,086 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 15:05:07,086 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 15:05:07,086 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 599.9ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:05:07,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 15:05:07,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3604. [2021-06-05 15:05:07,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3604 states, 3603 states have (on average 4.187343880099917) internal successors, (15087), 3603 states have internal predecessors, (15087), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3604 states to 3604 states and 15087 transitions. [2021-06-05 15:05:07,134 INFO L78 Accepts]: Start accepts. Automaton has 3604 states and 15087 transitions. Word has length 23 [2021-06-05 15:05:07,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:07,134 INFO L482 AbstractCegarLoop]: Abstraction has 3604 states and 15087 transitions. [2021-06-05 15:05:07,134 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:07,134 INFO L276 IsEmpty]: Start isEmpty. Operand 3604 states and 15087 transitions. [2021-06-05 15:05:07,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:07,139 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:07,139 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:07,339 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable262,133 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:07,340 INFO L430 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:07,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:07,340 INFO L82 PathProgramCache]: Analyzing trace with hash 897716007, now seen corresponding path program 33 times [2021-06-05 15:05:07,340 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:07,340 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1369975417] [2021-06-05 15:05:07,340 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:07,342 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:07,448 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:07,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:07,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1369975417] [2021-06-05 15:05:07,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1369975417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856905686] [2021-06-05 15:05:07,449 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:07,473 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:07,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:07,474 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:07,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:07,549 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:07,549 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:07,550 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:07,558 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:07,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:07,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:07,641 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:07,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856905686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:07,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:07,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:07,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2096781968] [2021-06-05 15:05:07,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:07,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:07,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:07,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:07,642 INFO L87 Difference]: Start difference. First operand 3604 states and 15087 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:08,282 INFO L93 Difference]: Finished difference Result 4016 states and 16685 transitions. [2021-06-05 15:05:08,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:05:08,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:08,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:08,289 INFO L225 Difference]: With dead ends: 4016 [2021-06-05 15:05:08,289 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 15:05:08,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 553.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:08,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 15:05:08,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3592. [2021-06-05 15:05:08,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3592 states, 3591 states have (on average 4.187134502923977) internal successors, (15036), 3591 states have internal predecessors, (15036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3592 states to 3592 states and 15036 transitions. [2021-06-05 15:05:08,335 INFO L78 Accepts]: Start accepts. Automaton has 3592 states and 15036 transitions. Word has length 23 [2021-06-05 15:05:08,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:08,336 INFO L482 AbstractCegarLoop]: Abstraction has 3592 states and 15036 transitions. [2021-06-05 15:05:08,336 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:08,336 INFO L276 IsEmpty]: Start isEmpty. Operand 3592 states and 15036 transitions. [2021-06-05 15:05:08,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:08,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:08,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:08,541 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable264,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:08,541 INFO L430 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:08,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:08,541 INFO L82 PathProgramCache]: Analyzing trace with hash -600531609, now seen corresponding path program 34 times [2021-06-05 15:05:08,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:08,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726471393] [2021-06-05 15:05:08,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:08,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:08,644 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:08,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726471393] [2021-06-05 15:05:08,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726471393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,645 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419969426] [2021-06-05 15:05:08,645 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:08,668 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:08,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:08,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:08,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:08,764 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:08,764 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:08,765 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:08,773 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:08,774 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:08,774 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:08,833 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:08,833 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419969426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:08,833 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:08,833 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:08,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567413407] [2021-06-05 15:05:08,833 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:08,833 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:08,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:08,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:08,833 INFO L87 Difference]: Start difference. First operand 3592 states and 15036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:09,254 INFO L93 Difference]: Finished difference Result 4019 states and 16700 transitions. [2021-06-05 15:05:09,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:09,254 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:09,254 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:09,261 INFO L225 Difference]: With dead ends: 4019 [2021-06-05 15:05:09,261 INFO L226 Difference]: Without dead ends: 3994 [2021-06-05 15:05:09,261 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:09,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3994 states. [2021-06-05 15:05:09,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3994 to 3584. [2021-06-05 15:05:09,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 4.188110521909015) internal successors, (15006), 3583 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 15006 transitions. [2021-06-05 15:05:09,308 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 15006 transitions. Word has length 23 [2021-06-05 15:05:09,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:09,308 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 15006 transitions. [2021-06-05 15:05:09,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:09,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 15006 transitions. [2021-06-05 15:05:09,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:09,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:09,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:09,513 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 135 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable266 [2021-06-05 15:05:09,513 INFO L430 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:09,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:09,513 INFO L82 PathProgramCache]: Analyzing trace with hash -893511691, now seen corresponding path program 16 times [2021-06-05 15:05:09,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:09,513 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378246455] [2021-06-05 15:05:09,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:09,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:09,607 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:09,608 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:09,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378246455] [2021-06-05 15:05:09,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378246455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:09,608 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122069595] [2021-06-05 15:05:09,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:09,632 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:09,633 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:09,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:09,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:09,736 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:09,736 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:09,738 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:09,745 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:09,746 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:09,746 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:09,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:09,810 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122069595] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:09,810 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:09,810 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:09,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340833327] [2021-06-05 15:05:09,810 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:09,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:09,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:09,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:09,811 INFO L87 Difference]: Start difference. First operand 3584 states and 15006 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:10,389 INFO L93 Difference]: Finished difference Result 3769 states and 15694 transitions. [2021-06-05 15:05:10,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:10,389 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:10,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:10,395 INFO L225 Difference]: With dead ends: 3769 [2021-06-05 15:05:10,396 INFO L226 Difference]: Without dead ends: 3754 [2021-06-05 15:05:10,396 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 436.6ms TimeCoverageRelationStatistics Valid=114, Invalid=642, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:05:10,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3754 states. [2021-06-05 15:05:10,446 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3754 to 3584. [2021-06-05 15:05:10,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3584 states, 3583 states have (on average 4.188110521909015) internal successors, (15006), 3583 states have internal predecessors, (15006), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3584 states to 3584 states and 15006 transitions. [2021-06-05 15:05:10,457 INFO L78 Accepts]: Start accepts. Automaton has 3584 states and 15006 transitions. Word has length 23 [2021-06-05 15:05:10,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:10,457 INFO L482 AbstractCegarLoop]: Abstraction has 3584 states and 15006 transitions. [2021-06-05 15:05:10,457 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:10,457 INFO L276 IsEmpty]: Start isEmpty. Operand 3584 states and 15006 transitions. [2021-06-05 15:05:10,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:10,462 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:10,462 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:10,662 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable268 [2021-06-05 15:05:10,662 INFO L430 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:10,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:10,663 INFO L82 PathProgramCache]: Analyzing trace with hash -442965643, now seen corresponding path program 17 times [2021-06-05 15:05:10,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:10,663 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [485912654] [2021-06-05 15:05:10,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:10,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:10,761 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,762 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:10,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [485912654] [2021-06-05 15:05:10,762 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [485912654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,762 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023777015] [2021-06-05 15:05:10,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:10,786 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:10,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:10,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:10,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:10,868 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:10,868 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:10,869 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:10,877 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:10,877 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:10,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023777015] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:10,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:10,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:10,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1649211199] [2021-06-05 15:05:10,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:10,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:10,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:10,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:10,959 INFO L87 Difference]: Start difference. First operand 3584 states and 15006 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:11,660 INFO L93 Difference]: Finished difference Result 3754 states and 15638 transitions. [2021-06-05 15:05:11,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:05:11,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:11,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:11,666 INFO L225 Difference]: With dead ends: 3754 [2021-06-05 15:05:11,666 INFO L226 Difference]: Without dead ends: 3732 [2021-06-05 15:05:11,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 637.2ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:11,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3732 states. [2021-06-05 15:05:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3732 to 3576. [2021-06-05 15:05:11,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3576 states, 3575 states have (on average 4.187972027972028) internal successors, (14972), 3575 states have internal predecessors, (14972), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3576 states to 3576 states and 14972 transitions. [2021-06-05 15:05:11,711 INFO L78 Accepts]: Start accepts. Automaton has 3576 states and 14972 transitions. Word has length 23 [2021-06-05 15:05:11,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:11,711 INFO L482 AbstractCegarLoop]: Abstraction has 3576 states and 14972 transitions. [2021-06-05 15:05:11,711 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:11,711 INFO L276 IsEmpty]: Start isEmpty. Operand 3576 states and 14972 transitions. [2021-06-05 15:05:11,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:11,715 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:11,715 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:11,916 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable270,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:11,916 INFO L430 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:11,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:11,916 INFO L82 PathProgramCache]: Analyzing trace with hash -873862077, now seen corresponding path program 18 times [2021-06-05 15:05:11,916 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:11,916 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326982986] [2021-06-05 15:05:11,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:11,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:12,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,011 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326982986] [2021-06-05 15:05:12,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326982986] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,011 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115537543] [2021-06-05 15:05:12,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:12,036 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:12,036 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:12,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 38 conjunts are in the unsatisfiable core [2021-06-05 15:05:12,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:12,141 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:05:12,141 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:05:12,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 12 [2021-06-05 15:05:12,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,146 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:12,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:12,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:15 [2021-06-05 15:05:12,182 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115537543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:12,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:12,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083111483] [2021-06-05 15:05:12,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:12,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:12,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:12,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:12,183 INFO L87 Difference]: Start difference. First operand 3576 states and 14972 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:12,594 INFO L93 Difference]: Finished difference Result 3980 states and 16505 transitions. [2021-06-05 15:05:12,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:05:12,594 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:12,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:12,601 INFO L225 Difference]: With dead ends: 3980 [2021-06-05 15:05:12,601 INFO L226 Difference]: Without dead ends: 3945 [2021-06-05 15:05:12,601 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 313.1ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:05:12,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3945 states. [2021-06-05 15:05:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3945 to 3616. [2021-06-05 15:05:12,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 4.193360995850623) internal successors, (15159), 3615 states have internal predecessors, (15159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 15159 transitions. [2021-06-05 15:05:12,665 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 15159 transitions. Word has length 23 [2021-06-05 15:05:12,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:12,665 INFO L482 AbstractCegarLoop]: Abstraction has 3616 states and 15159 transitions. [2021-06-05 15:05:12,665 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:12,665 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 15159 transitions. [2021-06-05 15:05:12,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:12,670 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:12,670 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:12,870 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable272,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:12,870 INFO L430 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:12,870 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:12,871 INFO L82 PathProgramCache]: Analyzing trace with hash -209925775, now seen corresponding path program 19 times [2021-06-05 15:05:12,871 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:12,871 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567956913] [2021-06-05 15:05:12,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:12,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:12,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:12,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567956913] [2021-06-05 15:05:12,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [567956913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:12,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348227716] [2021-06-05 15:05:12,966 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:12,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:12,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:12,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:13,089 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:13,090 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:13,091 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:13,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:13,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:13,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:13,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:13,160 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1348227716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:13,160 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:13,160 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:13,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1761643857] [2021-06-05 15:05:13,160 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:13,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:13,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:13,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:13,161 INFO L87 Difference]: Start difference. First operand 3616 states and 15159 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:13,674 INFO L93 Difference]: Finished difference Result 3838 states and 15999 transitions. [2021-06-05 15:05:13,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:13,675 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:13,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:13,681 INFO L225 Difference]: With dead ends: 3838 [2021-06-05 15:05:13,681 INFO L226 Difference]: Without dead ends: 3823 [2021-06-05 15:05:13,682 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=124, Invalid=688, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:05:13,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3823 states. [2021-06-05 15:05:13,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3823 to 3620. [2021-06-05 15:05:13,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193699917104173) internal successors, (15177), 3619 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15177 transitions. [2021-06-05 15:05:13,728 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15177 transitions. Word has length 23 [2021-06-05 15:05:13,728 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:13,728 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15177 transitions. [2021-06-05 15:05:13,728 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:13,728 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15177 transitions. [2021-06-05 15:05:13,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:13,733 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:13,733 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:13,933 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable273,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:13,934 INFO L430 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:13,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:13,934 INFO L82 PathProgramCache]: Analyzing trace with hash -631860043, now seen corresponding path program 20 times [2021-06-05 15:05:13,934 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:13,934 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509025444] [2021-06-05 15:05:13,934 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:13,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:14,038 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:14,038 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:14,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509025444] [2021-06-05 15:05:14,038 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509025444] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:14,038 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [342808965] [2021-06-05 15:05:14,038 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:14,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:14,065 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:14,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:05:14,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:14,184 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:14,185 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 15:05:14,186 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:14,195 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:14,197 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:05:14,197 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 15:05:14,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:14,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [342808965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:14,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:14,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:05:14,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1744130122] [2021-06-05 15:05:14,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:05:14,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:14,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:05:14,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:05:14,222 INFO L87 Difference]: Start difference. First operand 3620 states and 15177 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:14,716 INFO L93 Difference]: Finished difference Result 3859 states and 16075 transitions. [2021-06-05 15:05:14,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:14,716 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:14,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:14,722 INFO L225 Difference]: With dead ends: 3859 [2021-06-05 15:05:14,723 INFO L226 Difference]: Without dead ends: 3844 [2021-06-05 15:05:14,723 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 337.2ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:14,726 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3844 states. [2021-06-05 15:05:14,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3844 to 3628. [2021-06-05 15:05:14,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193824097049903) internal successors, (15211), 3627 states have internal predecessors, (15211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15211 transitions. [2021-06-05 15:05:14,797 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15211 transitions. Word has length 23 [2021-06-05 15:05:14,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:14,797 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15211 transitions. [2021-06-05 15:05:14,797 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:14,797 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15211 transitions. [2021-06-05 15:05:14,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:14,802 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:14,802 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:15,002 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable275,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,002 INFO L430 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:15,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:15,003 INFO L82 PathProgramCache]: Analyzing trace with hash -1538021003, now seen corresponding path program 21 times [2021-06-05 15:05:15,003 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:15,003 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107644761] [2021-06-05 15:05:15,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:15,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:15,111 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:15,111 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:15,111 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107644761] [2021-06-05 15:05:15,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2107644761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,112 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537494720] [2021-06-05 15:05:15,112 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:15,136 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:15,137 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:15,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 25 conjunts are in the unsatisfiable core [2021-06-05 15:05:15,138 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:15,232 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:05:15,233 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 26 treesize of output 54 [2021-06-05 15:05:15,236 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:15,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:15,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:15,248 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:47 [2021-06-05 15:05:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:15,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [537494720] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:15,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:15,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:05:15,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [84576726] [2021-06-05 15:05:15,301 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:05:15,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:15,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:05:15,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:05:15,301 INFO L87 Difference]: Start difference. First operand 3628 states and 15211 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,825 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:15,825 INFO L93 Difference]: Finished difference Result 4007 states and 16672 transitions. [2021-06-05 15:05:15,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:05:15,825 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:15,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:15,832 INFO L225 Difference]: With dead ends: 4007 [2021-06-05 15:05:15,832 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 15:05:15,832 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 435.1ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:15,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 15:05:15,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3632. [2021-06-05 15:05:15,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 4.193610575599009) internal successors, (15227), 3631 states have internal predecessors, (15227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 15227 transitions. [2021-06-05 15:05:15,880 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 15227 transitions. Word has length 23 [2021-06-05 15:05:15,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:15,880 INFO L482 AbstractCegarLoop]: Abstraction has 3632 states and 15227 transitions. [2021-06-05 15:05:15,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:15,880 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 15227 transitions. [2021-06-05 15:05:15,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:15,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:15,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:16,085 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable278 [2021-06-05 15:05:16,085 INFO L430 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:16,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:16,086 INFO L82 PathProgramCache]: Analyzing trace with hash -462309847, now seen corresponding path program 22 times [2021-06-05 15:05:16,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:16,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1238728207] [2021-06-05 15:05:16,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:16,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:16,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:16,181 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:16,181 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1238728207] [2021-06-05 15:05:16,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1238728207] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:16,182 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178158045] [2021-06-05 15:05:16,182 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:16,206 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:16,206 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:16,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:16,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:16,288 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:16,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:16,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:16,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:16,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:16,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178158045] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:16,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:16,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:16,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260989410] [2021-06-05 15:05:16,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:16,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:16,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:16,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:16,381 INFO L87 Difference]: Start difference. First operand 3632 states and 15227 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:17,018 INFO L93 Difference]: Finished difference Result 3856 states and 16061 transitions. [2021-06-05 15:05:17,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:05:17,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:17,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:17,025 INFO L225 Difference]: With dead ends: 3856 [2021-06-05 15:05:17,025 INFO L226 Difference]: Without dead ends: 3841 [2021-06-05 15:05:17,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 590.0ms TimeCoverageRelationStatistics Valid=160, Invalid=832, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:17,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3841 states. [2021-06-05 15:05:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3841 to 3624. [2021-06-05 15:05:17,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193486061275187) internal successors, (15193), 3623 states have internal predecessors, (15193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15193 transitions. [2021-06-05 15:05:17,088 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15193 transitions. Word has length 23 [2021-06-05 15:05:17,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:17,088 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15193 transitions. [2021-06-05 15:05:17,088 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:17,088 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15193 transitions. [2021-06-05 15:05:17,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:17,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:17,093 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:17,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable282 [2021-06-05 15:05:17,293 INFO L430 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:17,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:17,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1960557463, now seen corresponding path program 23 times [2021-06-05 15:05:17,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:17,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1865472232] [2021-06-05 15:05:17,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:17,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:17,388 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:17,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1865472232] [2021-06-05 15:05:17,388 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1865472232] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:17,388 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1048661713] [2021-06-05 15:05:17,388 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:17,413 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:17,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:17,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:05:17,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:17,511 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:17,511 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:17,512 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:17,520 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:17,520 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:17,520 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:17,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:17,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1048661713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:17,580 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:17,580 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:17,580 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519032181] [2021-06-05 15:05:17,580 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:17,580 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:17,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:17,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:17,581 INFO L87 Difference]: Start difference. First operand 3624 states and 15193 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:18,072 INFO L93 Difference]: Finished difference Result 3829 states and 15963 transitions. [2021-06-05 15:05:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:18,073 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:18,080 INFO L225 Difference]: With dead ends: 3829 [2021-06-05 15:05:18,080 INFO L226 Difference]: Without dead ends: 3814 [2021-06-05 15:05:18,080 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 421.8ms TimeCoverageRelationStatistics Valid=123, Invalid=633, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:05:18,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3814 states. [2021-06-05 15:05:18,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3814 to 3616. [2021-06-05 15:05:18,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3616 states, 3615 states have (on average 4.193360995850623) internal successors, (15159), 3615 states have internal predecessors, (15159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:18,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3616 states to 3616 states and 15159 transitions. [2021-06-05 15:05:18,128 INFO L78 Accepts]: Start accepts. Automaton has 3616 states and 15159 transitions. Word has length 23 [2021-06-05 15:05:18,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:18,128 INFO L482 AbstractCegarLoop]: Abstraction has 3616 states and 15159 transitions. [2021-06-05 15:05:18,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:18,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3616 states and 15159 transitions. [2021-06-05 15:05:18,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:18,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:18,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:18,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable284,143 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:18,333 INFO L430 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:18,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:18,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1788483957, now seen corresponding path program 24 times [2021-06-05 15:05:18,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:18,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1997536579] [2021-06-05 15:05:18,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:18,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:18,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:18,432 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:18,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1997536579] [2021-06-05 15:05:18,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1997536579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:18,432 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654298640] [2021-06-05 15:05:18,432 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:18,457 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:05:18,457 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:18,458 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:18,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:18,557 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:18,557 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:18,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:18,566 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:18,566 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:18,566 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:18,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:18,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654298640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:18,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:18,627 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:18,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297291413] [2021-06-05 15:05:18,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:18,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:18,627 INFO L87 Difference]: Start difference. First operand 3616 states and 15159 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,179 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:19,179 INFO L93 Difference]: Finished difference Result 3864 states and 16107 transitions. [2021-06-05 15:05:19,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:19,179 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:19,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:19,186 INFO L225 Difference]: With dead ends: 3864 [2021-06-05 15:05:19,186 INFO L226 Difference]: Without dead ends: 3849 [2021-06-05 15:05:19,186 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:19,190 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3849 states. [2021-06-05 15:05:19,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3849 to 3624. [2021-06-05 15:05:19,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193762075627933) internal successors, (15194), 3623 states have internal predecessors, (15194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15194 transitions. [2021-06-05 15:05:19,252 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15194 transitions. Word has length 23 [2021-06-05 15:05:19,252 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:19,252 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15194 transitions. [2021-06-05 15:05:19,252 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:19,252 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15194 transitions. [2021-06-05 15:05:19,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:19,257 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:19,257 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:19,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable286,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:19,460 INFO L430 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:19,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:19,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1921149387, now seen corresponding path program 25 times [2021-06-05 15:05:19,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:19,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166218066] [2021-06-05 15:05:19,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:19,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:19,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:19,565 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:19,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166218066] [2021-06-05 15:05:19,565 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166218066] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:19,565 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397881073] [2021-06-05 15:05:19,565 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:19,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:19,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:19,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:19,684 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:19,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:19,686 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:19,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:19,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:19,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:19,776 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:19,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [397881073] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:19,776 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:19,776 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:19,776 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697202595] [2021-06-05 15:05:19,776 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:19,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:19,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:19,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:19,777 INFO L87 Difference]: Start difference. First operand 3624 states and 15194 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,417 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:20,417 INFO L93 Difference]: Finished difference Result 3826 states and 15955 transitions. [2021-06-05 15:05:20,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:05:20,417 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:20,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:20,424 INFO L225 Difference]: With dead ends: 3826 [2021-06-05 15:05:20,424 INFO L226 Difference]: Without dead ends: 3804 [2021-06-05 15:05:20,424 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 621.2ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:05:20,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3804 states. [2021-06-05 15:05:20,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3804 to 3628. [2021-06-05 15:05:20,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193548387096774) internal successors, (15210), 3627 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15210 transitions. [2021-06-05 15:05:20,473 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15210 transitions. Word has length 23 [2021-06-05 15:05:20,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:20,473 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15210 transitions. [2021-06-05 15:05:20,473 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:20,473 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15210 transitions. [2021-06-05 15:05:20,478 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:20,478 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:20,478 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:20,678 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable288 [2021-06-05 15:05:20,679 INFO L430 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:20,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:20,679 INFO L82 PathProgramCache]: Analyzing trace with hash -307582653, now seen corresponding path program 26 times [2021-06-05 15:05:20,679 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:20,679 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044244635] [2021-06-05 15:05:20,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:20,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:20,780 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:20,780 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:20,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044244635] [2021-06-05 15:05:20,780 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044244635] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:20,780 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101353495] [2021-06-05 15:05:20,780 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:20,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:20,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:20,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:20,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:20,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:20,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:20,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:20,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:20,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:20,898 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:20,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1101353495] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:20,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:20,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:20,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093204851] [2021-06-05 15:05:20,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:20,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:20,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:20,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:20,978 INFO L87 Difference]: Start difference. First operand 3628 states and 15210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:21,625 INFO L93 Difference]: Finished difference Result 3804 states and 15876 transitions. [2021-06-05 15:05:21,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:21,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:21,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:21,631 INFO L225 Difference]: With dead ends: 3804 [2021-06-05 15:05:21,631 INFO L226 Difference]: Without dead ends: 3789 [2021-06-05 15:05:21,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 623.2ms TimeCoverageRelationStatistics Valid=165, Invalid=705, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:21,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3789 states. [2021-06-05 15:05:21,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3789 to 3620. [2021-06-05 15:05:21,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193423597678917) internal successors, (15176), 3619 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15176 transitions. [2021-06-05 15:05:21,679 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15176 transitions. Word has length 23 [2021-06-05 15:05:21,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:21,679 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15176 transitions. [2021-06-05 15:05:21,679 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15176 transitions. [2021-06-05 15:05:21,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:21,684 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:21,684 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:21,884 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable290,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:21,884 INFO L430 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:21,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:21,884 INFO L82 PathProgramCache]: Analyzing trace with hash 1561262577, now seen corresponding path program 27 times [2021-06-05 15:05:21,884 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:21,885 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467586168] [2021-06-05 15:05:21,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:21,886 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:21,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:21,982 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:21,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467586168] [2021-06-05 15:05:21,982 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467586168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:21,982 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540683898] [2021-06-05 15:05:21,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:22,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:05:22,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:22,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:22,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:22,106 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:22,107 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:22,108 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,115 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:22,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:22,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:22,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:22,178 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540683898] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:22,178 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:22,178 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:22,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142385054] [2021-06-05 15:05:22,178 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:22,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:22,179 INFO L87 Difference]: Start difference. First operand 3620 states and 15176 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:22,687 INFO L93 Difference]: Finished difference Result 3875 states and 16145 transitions. [2021-06-05 15:05:22,687 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:22,687 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:22,693 INFO L225 Difference]: With dead ends: 3875 [2021-06-05 15:05:22,694 INFO L226 Difference]: Without dead ends: 3860 [2021-06-05 15:05:22,694 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 419.2ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:22,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3860 states. [2021-06-05 15:05:22,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3860 to 3624. [2021-06-05 15:05:22,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3624 states, 3623 states have (on average 4.193762075627933) internal successors, (15194), 3623 states have internal predecessors, (15194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:22,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3624 states to 3624 states and 15194 transitions. [2021-06-05 15:05:22,740 INFO L78 Accepts]: Start accepts. Automaton has 3624 states and 15194 transitions. Word has length 23 [2021-06-05 15:05:22,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:22,740 INFO L482 AbstractCegarLoop]: Abstraction has 3624 states and 15194 transitions. [2021-06-05 15:05:22,740 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:22,740 INFO L276 IsEmpty]: Start isEmpty. Operand 3624 states and 15194 transitions. [2021-06-05 15:05:22,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:22,745 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:22,745 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:22,946 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable292,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:22,946 INFO L430 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:22,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:22,946 INFO L82 PathProgramCache]: Analyzing trace with hash 2074789429, now seen corresponding path program 28 times [2021-06-05 15:05:22,946 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:22,946 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371714747] [2021-06-05 15:05:22,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:22,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:23,044 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:23,044 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371714747] [2021-06-05 15:05:23,044 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371714747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:23,044 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363520822] [2021-06-05 15:05:23,044 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:23,068 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:23,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:23,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:23,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:23,150 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:23,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:23,152 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:23,159 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:23,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:23,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:23,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363520822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:23,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:23,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:23,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519512504] [2021-06-05 15:05:23,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:23,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:23,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:23,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:23,243 INFO L87 Difference]: Start difference. First operand 3624 states and 15194 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:23,869 INFO L93 Difference]: Finished difference Result 3827 states and 15958 transitions. [2021-06-05 15:05:23,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:05:23,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:23,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:23,877 INFO L225 Difference]: With dead ends: 3827 [2021-06-05 15:05:23,877 INFO L226 Difference]: Without dead ends: 3806 [2021-06-05 15:05:23,877 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 548.5ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:23,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3806 states. [2021-06-05 15:05:23,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3806 to 3628. [2021-06-05 15:05:23,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3628 states, 3627 states have (on average 4.193548387096774) internal successors, (15210), 3627 states have internal predecessors, (15210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3628 states to 3628 states and 15210 transitions. [2021-06-05 15:05:23,924 INFO L78 Accepts]: Start accepts. Automaton has 3628 states and 15210 transitions. Word has length 23 [2021-06-05 15:05:23,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:23,924 INFO L482 AbstractCegarLoop]: Abstraction has 3628 states and 15210 transitions. [2021-06-05 15:05:23,924 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:23,924 INFO L276 IsEmpty]: Start isEmpty. Operand 3628 states and 15210 transitions. [2021-06-05 15:05:23,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:23,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:23,929 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:24,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable294,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:24,130 INFO L430 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:24,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:24,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1144466711, now seen corresponding path program 29 times [2021-06-05 15:05:24,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:24,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958849972] [2021-06-05 15:05:24,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:24,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:24,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:24,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:24,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958849972] [2021-06-05 15:05:24,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958849972] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:24,228 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633317862] [2021-06-05 15:05:24,228 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:24,253 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:24,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:24,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:24,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:24,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:24,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:24,337 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:24,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:24,345 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:24,345 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:24,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:24,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1633317862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:24,426 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:24,426 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:24,427 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642604889] [2021-06-05 15:05:24,427 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:24,427 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:24,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:24,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:24,427 INFO L87 Difference]: Start difference. First operand 3628 states and 15210 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:24,921 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:24,921 INFO L93 Difference]: Finished difference Result 3813 states and 15904 transitions. [2021-06-05 15:05:24,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:24,921 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:24,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:24,927 INFO L225 Difference]: With dead ends: 3813 [2021-06-05 15:05:24,928 INFO L226 Difference]: Without dead ends: 3798 [2021-06-05 15:05:24,928 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 471.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:24,931 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3798 states. [2021-06-05 15:05:24,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3798 to 3620. [2021-06-05 15:05:24,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3620 states, 3619 states have (on average 4.193423597678917) internal successors, (15176), 3619 states have internal predecessors, (15176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:24,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3620 states to 3620 states and 15176 transitions. [2021-06-05 15:05:24,974 INFO L78 Accepts]: Start accepts. Automaton has 3620 states and 15176 transitions. Word has length 23 [2021-06-05 15:05:24,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:24,974 INFO L482 AbstractCegarLoop]: Abstraction has 3620 states and 15176 transitions. [2021-06-05 15:05:24,974 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:24,974 INFO L276 IsEmpty]: Start isEmpty. Operand 3620 states and 15176 transitions. [2021-06-05 15:05:24,979 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:24,979 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:24,979 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:25,180 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable296,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:25,180 INFO L430 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:25,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:25,180 INFO L82 PathProgramCache]: Analyzing trace with hash -863470859, now seen corresponding path program 30 times [2021-06-05 15:05:25,180 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:25,180 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241517432] [2021-06-05 15:05:25,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:25,182 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:25,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:25,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:25,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241517432] [2021-06-05 15:05:25,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241517432] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [463023258] [2021-06-05 15:05:25,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:25,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:25,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:25,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:25,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:25,385 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:25,385 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:25,386 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,395 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:25,395 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:25,395 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:25,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:25,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [463023258] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:25,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:25,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:25,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000943196] [2021-06-05 15:05:25,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:25,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:25,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:25,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:25,500 INFO L87 Difference]: Start difference. First operand 3620 states and 15176 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:25,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:25,991 INFO L93 Difference]: Finished difference Result 3838 states and 16010 transitions. [2021-06-05 15:05:25,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:05:25,991 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:25,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:25,998 INFO L225 Difference]: With dead ends: 3838 [2021-06-05 15:05:25,998 INFO L226 Difference]: Without dead ends: 3816 [2021-06-05 15:05:25,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 510.7ms TimeCoverageRelationStatistics Valid=132, Invalid=570, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:26,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3816 states. [2021-06-05 15:05:26,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3816 to 3629. [2021-06-05 15:05:26,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.191841234840132) internal successors, (15208), 3628 states have internal predecessors, (15208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:26,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15208 transitions. [2021-06-05 15:05:26,045 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15208 transitions. Word has length 23 [2021-06-05 15:05:26,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:26,045 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15208 transitions. [2021-06-05 15:05:26,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:26,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15208 transitions. [2021-06-05 15:05:26,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:26,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:26,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:26,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable298 [2021-06-05 15:05:26,250 INFO L430 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:26,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:26,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1905046927, now seen corresponding path program 31 times [2021-06-05 15:05:26,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:26,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614098078] [2021-06-05 15:05:26,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:26,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:26,354 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:26,355 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:26,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614098078] [2021-06-05 15:05:26,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614098078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:26,355 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907872071] [2021-06-05 15:05:26,355 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:26,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:26,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:26,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:26,450 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:26,450 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:26,451 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:26,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:26,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:26,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:26,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:26,561 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1907872071] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:26,561 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:26,561 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:26,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202885178] [2021-06-05 15:05:26,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:26,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:26,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:26,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:26,561 INFO L87 Difference]: Start difference. First operand 3629 states and 15208 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:27,075 INFO L93 Difference]: Finished difference Result 3845 states and 16033 transitions. [2021-06-05 15:05:27,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:27,075 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:27,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:27,082 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 15:05:27,082 INFO L226 Difference]: Without dead ends: 3821 [2021-06-05 15:05:27,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:05:27,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3821 states. [2021-06-05 15:05:27,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3821 to 3626. [2021-06-05 15:05:27,121 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 15:05:27,129 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 15:05:27,129 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:27,129 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 15:05:27,129 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:27,129 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 15:05:27,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:27,134 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:27,134 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:27,334 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable300 [2021-06-05 15:05:27,334 INFO L430 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:27,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:27,335 INFO L82 PathProgramCache]: Analyzing trace with hash 2102799017, now seen corresponding path program 32 times [2021-06-05 15:05:27,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:27,335 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135756311] [2021-06-05 15:05:27,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:27,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:27,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:27,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:27,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135756311] [2021-06-05 15:05:27,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1135756311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:27,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1518149277] [2021-06-05 15:05:27,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:27,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:27,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:27,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:27,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:27,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:27,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:27,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:27,559 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:27,559 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:27,559 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:27,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1518149277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:27,674 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:27,674 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:27,674 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061471797] [2021-06-05 15:05:27,674 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:27,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:27,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:27,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:27,675 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:28,266 INFO L93 Difference]: Finished difference Result 3802 states and 15861 transitions. [2021-06-05 15:05:28,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:28,267 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:28,267 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:28,273 INFO L225 Difference]: With dead ends: 3802 [2021-06-05 15:05:28,273 INFO L226 Difference]: Without dead ends: 3780 [2021-06-05 15:05:28,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 626.7ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:28,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3780 states. [2021-06-05 15:05:28,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3780 to 3630. [2021-06-05 15:05:28,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 15:05:28,320 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 15:05:28,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:28,320 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 15:05:28,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:28,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 15:05:28,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:28,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:28,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:28,526 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable302 [2021-06-05 15:05:28,526 INFO L430 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:28,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:28,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1609581631, now seen corresponding path program 33 times [2021-06-05 15:05:28,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:28,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675040568] [2021-06-05 15:05:28,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:28,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:28,649 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:28,649 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:28,649 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675040568] [2021-06-05 15:05:28,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1675040568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:28,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [893374239] [2021-06-05 15:05:28,650 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:28,676 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:28,676 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:28,677 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:28,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:28,790 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:05:28,790 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:05:28,791 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:28,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:28,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:28,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 15:05:28,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:28,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [893374239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:28,915 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:28,915 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:05:28,915 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [989793598] [2021-06-05 15:05:28,915 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:05:28,915 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:28,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:05:28,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:05:28,916 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:29,693 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:29,693 INFO L93 Difference]: Finished difference Result 3922 states and 16351 transitions. [2021-06-05 15:05:29,693 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:05:29,693 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:29,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:29,700 INFO L225 Difference]: With dead ends: 3922 [2021-06-05 15:05:29,700 INFO L226 Difference]: Without dead ends: 3907 [2021-06-05 15:05:29,700 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 714.9ms TimeCoverageRelationStatistics Valid=185, Invalid=937, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:05:29,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3907 states. [2021-06-05 15:05:29,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3907 to 3626. [2021-06-05 15:05:29,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:29,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 15:05:29,747 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 15:05:29,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:29,747 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 15:05:29,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:29,748 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 15:05:29,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:29,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:29,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:29,953 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable304,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:29,953 INFO L430 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:29,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:29,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1750609409, now seen corresponding path program 34 times [2021-06-05 15:05:29,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:29,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363431689] [2021-06-05 15:05:29,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:29,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:30,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:30,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363431689] [2021-06-05 15:05:30,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [363431689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2120320998] [2021-06-05 15:05:30,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:30,083 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:30,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:30,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:30,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:30,154 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:30,154 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:30,155 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:30,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:30,164 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:30,164 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:30,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:30,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2120320998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:30,288 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:30,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:30,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778949680] [2021-06-05 15:05:30,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:30,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:30,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:30,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:30,289 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:30,857 INFO L93 Difference]: Finished difference Result 3788 states and 15802 transitions. [2021-06-05 15:05:30,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:30,858 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:30,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:30,864 INFO L225 Difference]: With dead ends: 3788 [2021-06-05 15:05:30,864 INFO L226 Difference]: Without dead ends: 3767 [2021-06-05 15:05:30,864 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 524.4ms TimeCoverageRelationStatistics Valid=177, Invalid=753, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:05:30,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3767 states. [2021-06-05 15:05:30,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3767 to 3630. [2021-06-05 15:05:30,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 15:05:30,910 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 15:05:30,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:30,910 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 15:05:30,910 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:30,910 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 15:05:30,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:30,915 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:30,915 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:31,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable308,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:31,125 INFO L430 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:31,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:31,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1531665355, now seen corresponding path program 35 times [2021-06-05 15:05:31,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:31,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083386846] [2021-06-05 15:05:31,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:31,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:31,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:31,228 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083386846] [2021-06-05 15:05:31,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083386846] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:31,229 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [215818749] [2021-06-05 15:05:31,229 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:31,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:31,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:31,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:31,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:31,326 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:31,326 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:31,327 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:31,336 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:31,337 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:31,337 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:31,439 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:31,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [215818749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:31,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:31,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:31,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949799777] [2021-06-05 15:05:31,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:31,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:31,440 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:31,440 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:31,440 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:31,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:31,884 INFO L93 Difference]: Finished difference Result 3777 states and 15760 transitions. [2021-06-05 15:05:31,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:05:31,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:31,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:31,891 INFO L225 Difference]: With dead ends: 3777 [2021-06-05 15:05:31,891 INFO L226 Difference]: Without dead ends: 3762 [2021-06-05 15:05:31,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 454.5ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:31,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3762 states. [2021-06-05 15:05:31,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3762 to 3626. [2021-06-05 15:05:31,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:31,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 15:05:31,936 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 15:05:31,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:31,936 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 15:05:31,936 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:31,936 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 15:05:31,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:31,941 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:31,941 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:32,141 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable310 [2021-06-05 15:05:32,141 INFO L430 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:32,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:32,142 INFO L82 PathProgramCache]: Analyzing trace with hash 515550249, now seen corresponding path program 36 times [2021-06-05 15:05:32,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:32,142 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177580284] [2021-06-05 15:05:32,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:32,144 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:32,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:32,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177580284] [2021-06-05 15:05:32,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [177580284] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:32,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [515397607] [2021-06-05 15:05:32,238 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:32,263 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:05:32,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:32,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:32,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:32,361 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:32,361 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:32,362 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:32,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:32,370 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:32,370 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:32,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:32,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [515397607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:32,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:32,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:32,452 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623656025] [2021-06-05 15:05:32,452 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:32,452 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:32,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:32,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:32,453 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:32,909 INFO L93 Difference]: Finished difference Result 3851 states and 16056 transitions. [2021-06-05 15:05:32,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:32,909 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:32,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:32,916 INFO L225 Difference]: With dead ends: 3851 [2021-06-05 15:05:32,916 INFO L226 Difference]: Without dead ends: 3836 [2021-06-05 15:05:32,916 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 437.4ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:32,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3836 states. [2021-06-05 15:05:32,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3836 to 3634. [2021-06-05 15:05:32,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193228736581338) internal successors, (15234), 3633 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15234 transitions. [2021-06-05 15:05:32,962 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15234 transitions. Word has length 23 [2021-06-05 15:05:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:32,962 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15234 transitions. [2021-06-05 15:05:32,962 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:32,962 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15234 transitions. [2021-06-05 15:05:32,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:32,967 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:32,967 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:33,167 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 156 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable312 [2021-06-05 15:05:33,168 INFO L430 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:33,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:33,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1100884201, now seen corresponding path program 37 times [2021-06-05 15:05:33,168 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:33,168 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148696685] [2021-06-05 15:05:33,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:33,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:33,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:33,269 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:33,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148696685] [2021-06-05 15:05:33,269 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148696685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,269 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704630517] [2021-06-05 15:05:33,269 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:33,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:33,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:33,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:33,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:33,392 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:33,393 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:33,401 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:33,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:33,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:33,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:33,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1704630517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:33,484 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:33,484 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:33,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079830188] [2021-06-05 15:05:33,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:33,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:33,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:33,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:33,484 INFO L87 Difference]: Start difference. First operand 3634 states and 15234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:34,228 INFO L93 Difference]: Finished difference Result 3824 states and 15947 transitions. [2021-06-05 15:05:34,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:05:34,228 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:34,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:34,234 INFO L225 Difference]: With dead ends: 3824 [2021-06-05 15:05:34,234 INFO L226 Difference]: Without dead ends: 3802 [2021-06-05 15:05:34,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=182, Invalid=748, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:05:34,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3802 states. [2021-06-05 15:05:34,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3802 to 3638. [2021-06-05 15:05:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,280 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 15:05:34,280 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 15:05:34,280 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:34,280 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 15:05:34,280 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:34,280 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 15:05:34,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:34,285 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:34,285 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:34,485 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 157 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable314 [2021-06-05 15:05:34,486 INFO L430 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:34,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:34,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1580516361, now seen corresponding path program 38 times [2021-06-05 15:05:34,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:34,486 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687296810] [2021-06-05 15:05:34,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:34,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:34,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:34,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:34,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687296810] [2021-06-05 15:05:34,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687296810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:34,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997810267] [2021-06-05 15:05:34,587 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:34,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:34,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:34,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:34,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:34,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:34,724 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:34,725 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:34,732 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:34,733 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:34,733 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:34,812 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [997810267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:34,812 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:34,812 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:34,812 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620199642] [2021-06-05 15:05:34,812 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:34,812 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:34,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:34,812 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:34,812 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:35,415 INFO L93 Difference]: Finished difference Result 3789 states and 15816 transitions. [2021-06-05 15:05:35,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:35,415 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:35,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:35,422 INFO L225 Difference]: With dead ends: 3789 [2021-06-05 15:05:35,422 INFO L226 Difference]: Without dead ends: 3774 [2021-06-05 15:05:35,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 632.3ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:35,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3774 states. [2021-06-05 15:05:35,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3774 to 3630. [2021-06-05 15:05:35,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 15:05:35,474 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 15:05:35,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:35,474 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 15:05:35,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:35,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 15:05:35,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:35,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:35,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:35,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 158 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable316 [2021-06-05 15:05:35,680 INFO L430 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:35,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:35,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1019955137, now seen corresponding path program 39 times [2021-06-05 15:05:35,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:35,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042467226] [2021-06-05 15:05:35,680 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:35,778 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:35,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042467226] [2021-06-05 15:05:35,778 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2042467226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,778 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500076169] [2021-06-05 15:05:35,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:35,803 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:05:35,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:35,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:35,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:35,905 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:35,905 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:35,906 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:35,914 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:35,914 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:35,914 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:35,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:35,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500076169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:35,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:35,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:35,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963293774] [2021-06-05 15:05:35,976 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:35,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:35,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:35,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:35,977 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:36,497 INFO L93 Difference]: Finished difference Result 3822 states and 15936 transitions. [2021-06-05 15:05:36,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:36,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:36,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:36,504 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 15:05:36,504 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 15:05:36,504 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 395.1ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:36,508 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 15:05:36,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 3626. [2021-06-05 15:05:36,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 15:05:36,550 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 15:05:36,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:36,550 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 15:05:36,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:36,551 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 15:05:36,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:36,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:36,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:36,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable318 [2021-06-05 15:05:36,769 INFO L430 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:36,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:36,769 INFO L82 PathProgramCache]: Analyzing trace with hash -348137985, now seen corresponding path program 40 times [2021-06-05 15:05:36,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:36,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8028542] [2021-06-05 15:05:36,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:36,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:36,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:36,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:36,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8028542] [2021-06-05 15:05:36,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8028542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:36,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737427164] [2021-06-05 15:05:36,888 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:36,913 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:36,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:36,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:36,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:37,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:37,010 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:37,011 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:37,018 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:37,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:37,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:37,079 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:37,079 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737427164] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:37,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:37,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:37,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879300823] [2021-06-05 15:05:37,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:37,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:37,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:37,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:37,080 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:37,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:37,664 INFO L93 Difference]: Finished difference Result 3863 states and 16096 transitions. [2021-06-05 15:05:37,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:37,664 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:37,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:37,671 INFO L225 Difference]: With dead ends: 3863 [2021-06-05 15:05:37,671 INFO L226 Difference]: Without dead ends: 3848 [2021-06-05 15:05:37,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:37,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3848 states. [2021-06-05 15:05:37,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3848 to 3634. [2021-06-05 15:05:37,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193228736581338) internal successors, (15234), 3633 states have internal predecessors, (15234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:37,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15234 transitions. [2021-06-05 15:05:37,721 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15234 transitions. Word has length 23 [2021-06-05 15:05:37,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:37,721 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15234 transitions. [2021-06-05 15:05:37,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:37,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15234 transitions. [2021-06-05 15:05:37,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:37,726 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:37,726 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:37,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable320 [2021-06-05 15:05:37,927 INFO L430 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:37,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:37,927 INFO L82 PathProgramCache]: Analyzing trace with hash 165388867, now seen corresponding path program 41 times [2021-06-05 15:05:37,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:37,927 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064423357] [2021-06-05 15:05:37,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:37,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:38,024 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064423357] [2021-06-05 15:05:38,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064423357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104410682] [2021-06-05 15:05:38,024 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:38,049 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:38,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:38,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:38,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:38,131 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:38,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:38,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:38,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:38,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:38,220 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:38,220 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104410682] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:38,220 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:38,220 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:38,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1978138155] [2021-06-05 15:05:38,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:38,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:38,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:38,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:38,220 INFO L87 Difference]: Start difference. First operand 3634 states and 15234 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,901 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:38,901 INFO L93 Difference]: Finished difference Result 3822 states and 15936 transitions. [2021-06-05 15:05:38,901 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:05:38,902 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:38,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:38,908 INFO L225 Difference]: With dead ends: 3822 [2021-06-05 15:05:38,909 INFO L226 Difference]: Without dead ends: 3801 [2021-06-05 15:05:38,909 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 524.9ms TimeCoverageRelationStatistics Valid=170, Invalid=760, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:05:38,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3801 states. [2021-06-05 15:05:38,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3801 to 3638. [2021-06-05 15:05:38,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 15:05:38,983 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 15:05:38,983 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:38,983 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 15:05:38,983 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:38,983 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 15:05:38,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:38,988 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:38,988 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:39,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable322 [2021-06-05 15:05:39,190 INFO L430 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:39,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:39,190 INFO L82 PathProgramCache]: Analyzing trace with hash 1241100023, now seen corresponding path program 42 times [2021-06-05 15:05:39,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:39,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58240157] [2021-06-05 15:05:39,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:39,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:39,288 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:39,288 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:39,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58240157] [2021-06-05 15:05:39,288 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58240157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:39,288 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395708889] [2021-06-05 15:05:39,288 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:39,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:39,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:39,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:39,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:39,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:39,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:39,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:39,409 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:39,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:39,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:39,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:39,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1395708889] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:39,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:39,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:39,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [662480273] [2021-06-05 15:05:39,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:39,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:39,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:39,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:39,500 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:39,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:39,995 INFO L93 Difference]: Finished difference Result 3803 states and 15863 transitions. [2021-06-05 15:05:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:39,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:39,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:40,002 INFO L225 Difference]: With dead ends: 3803 [2021-06-05 15:05:40,002 INFO L226 Difference]: Without dead ends: 3788 [2021-06-05 15:05:40,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 485.8ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:40,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3788 states. [2021-06-05 15:05:40,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3788 to 3630. [2021-06-05 15:05:40,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.192890603472031) internal successors, (15216), 3629 states have internal predecessors, (15216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15216 transitions. [2021-06-05 15:05:40,051 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15216 transitions. Word has length 23 [2021-06-05 15:05:40,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:40,051 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15216 transitions. [2021-06-05 15:05:40,051 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,051 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15216 transitions. [2021-06-05 15:05:40,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:40,056 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:40,056 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:40,256 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable324,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:40,257 INFO L430 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:40,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:40,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1411914955, now seen corresponding path program 43 times [2021-06-05 15:05:40,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:40,257 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62501948] [2021-06-05 15:05:40,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:40,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:40,355 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:40,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:40,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62501948] [2021-06-05 15:05:40,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62501948] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414524811] [2021-06-05 15:05:40,356 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:40,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:40,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:40,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:40,478 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:40,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:40,479 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:40,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:40,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:40,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:40,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:40,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414524811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:40,548 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:40,548 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:40,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210078299] [2021-06-05 15:05:40,548 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:40,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:40,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:40,548 INFO L87 Difference]: Start difference. First operand 3630 states and 15216 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:40,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:40,989 INFO L93 Difference]: Finished difference Result 3812 states and 15896 transitions. [2021-06-05 15:05:40,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:40,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:40,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:40,996 INFO L225 Difference]: With dead ends: 3812 [2021-06-05 15:05:40,996 INFO L226 Difference]: Without dead ends: 3797 [2021-06-05 15:05:40,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 392.1ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:05:41,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3797 states. [2021-06-05 15:05:41,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3797 to 3626. [2021-06-05 15:05:41,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 15:05:41,044 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 15:05:41,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:41,044 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 15:05:41,044 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:41,044 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 15:05:41,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:41,049 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:41,049 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:41,249 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable326 [2021-06-05 15:05:41,249 INFO L430 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:41,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:41,249 INFO L82 PathProgramCache]: Analyzing trace with hash 1665661203, now seen corresponding path program 44 times [2021-06-05 15:05:41,250 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:41,250 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459262462] [2021-06-05 15:05:41,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:41,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:41,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:41,401 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:41,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459262462] [2021-06-05 15:05:41,401 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459262462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:41,401 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941686108] [2021-06-05 15:05:41,401 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:41,425 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:41,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:41,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:05:41,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:41,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:41,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 15:05:41,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:41,561 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:41,563 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:05:41,563 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 15:05:41,587 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:41,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941686108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:41,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:41,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:05:41,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1681836412] [2021-06-05 15:05:41,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:05:41,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:41,587 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:05:41,587 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=251, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:05:41,587 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:42,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:42,248 INFO L93 Difference]: Finished difference Result 4271 states and 17731 transitions. [2021-06-05 15:05:42,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:05:42,248 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:42,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:42,256 INFO L225 Difference]: With dead ends: 4271 [2021-06-05 15:05:42,256 INFO L226 Difference]: Without dead ends: 4249 [2021-06-05 15:05:42,256 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 431.4ms TimeCoverageRelationStatistics Valid=140, Invalid=730, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:05:42,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-06-05 15:05:42,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 3638. [2021-06-05 15:05:42,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.1946659334616445) internal successors, (15256), 3637 states have internal predecessors, (15256), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:42,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15256 transitions. [2021-06-05 15:05:42,306 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15256 transitions. Word has length 23 [2021-06-05 15:05:42,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:42,306 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15256 transitions. [2021-06-05 15:05:42,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:42,306 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15256 transitions. [2021-06-05 15:05:42,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:42,311 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:42,311 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:42,511 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable328 [2021-06-05 15:05:42,511 INFO L430 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:42,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:42,511 INFO L82 PathProgramCache]: Analyzing trace with hash -2043972141, now seen corresponding path program 45 times [2021-06-05 15:05:42,512 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:42,512 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1154634544] [2021-06-05 15:05:42,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:42,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:42,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:42,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:42,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1154634544] [2021-06-05 15:05:42,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1154634544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:42,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1254229504] [2021-06-05 15:05:42,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:42,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:05:42,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:42,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:05:42,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:42,759 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:42,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 15:05:42,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:42,771 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:42,773 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:42,773 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 15:05:42,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:42,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1254229504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:42,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:42,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:05:42,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [578202468] [2021-06-05 15:05:42,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:05:42,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:42,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:05:42,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:05:42,814 INFO L87 Difference]: Start difference. First operand 3638 states and 15256 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:43,393 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:43,393 INFO L93 Difference]: Finished difference Result 4093 states and 17016 transitions. [2021-06-05 15:05:43,394 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:43,394 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:43,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:43,401 INFO L225 Difference]: With dead ends: 4093 [2021-06-05 15:05:43,401 INFO L226 Difference]: Without dead ends: 4067 [2021-06-05 15:05:43,401 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 467.2ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:05:43,405 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4067 states. [2021-06-05 15:05:43,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4067 to 3642. [2021-06-05 15:05:43,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.194452073606152) internal successors, (15272), 3641 states have internal predecessors, (15272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:43,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15272 transitions. [2021-06-05 15:05:43,474 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15272 transitions. Word has length 23 [2021-06-05 15:05:43,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:43,474 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15272 transitions. [2021-06-05 15:05:43,474 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:43,474 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15272 transitions. [2021-06-05 15:05:43,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:43,480 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:43,480 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:43,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable331 [2021-06-05 15:05:43,689 INFO L430 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:43,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:43,689 INFO L82 PathProgramCache]: Analyzing trace with hash -430405407, now seen corresponding path program 46 times [2021-06-05 15:05:43,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:43,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1594296222] [2021-06-05 15:05:43,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:43,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:43,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:43,825 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:43,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1594296222] [2021-06-05 15:05:43,825 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1594296222] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:43,825 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724871706] [2021-06-05 15:05:43,825 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:43,851 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:43,851 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:43,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:43,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:43,941 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:43,942 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:43,943 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:43,952 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:43,952 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:43,953 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:44,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:44,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724871706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:44,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:44,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:44,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232795019] [2021-06-05 15:05:44,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:44,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:44,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:44,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:44,043 INFO L87 Difference]: Start difference. First operand 3642 states and 15272 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:44,844 INFO L93 Difference]: Finished difference Result 4158 states and 17272 transitions. [2021-06-05 15:05:44,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:05:44,845 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:44,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:44,852 INFO L225 Difference]: With dead ends: 4158 [2021-06-05 15:05:44,852 INFO L226 Difference]: Without dead ends: 4137 [2021-06-05 15:05:44,852 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 755.0ms TimeCoverageRelationStatistics Valid=210, Invalid=846, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:05:44,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4137 states. [2021-06-05 15:05:44,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4137 to 3634. [2021-06-05 15:05:44,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.1943297550233964) internal successors, (15238), 3633 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15238 transitions. [2021-06-05 15:05:44,900 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15238 transitions. Word has length 23 [2021-06-05 15:05:44,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:44,900 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15238 transitions. [2021-06-05 15:05:44,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:44,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15238 transitions. [2021-06-05 15:05:44,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:44,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:44,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:45,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable334 [2021-06-05 15:05:45,105 INFO L430 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:45,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:45,106 INFO L82 PathProgramCache]: Analyzing trace with hash 2015158581, now seen corresponding path program 47 times [2021-06-05 15:05:45,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:45,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149556934] [2021-06-05 15:05:45,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:45,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:45,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:45,221 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:45,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149556934] [2021-06-05 15:05:45,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149556934] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,221 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1098241159] [2021-06-05 15:05:45,221 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:45,246 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:05:45,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:45,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:45,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:45,336 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:45,336 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:45,338 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:45,345 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:45,346 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:45,346 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:45,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:45,408 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1098241159] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:45,408 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:45,408 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:45,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929504060] [2021-06-05 15:05:45,409 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:45,409 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:45,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:45,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:45,409 INFO L87 Difference]: Start difference. First operand 3634 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:46,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:46,232 INFO L93 Difference]: Finished difference Result 4302 states and 17834 transitions. [2021-06-05 15:05:46,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:05:46,232 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:46,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:46,240 INFO L225 Difference]: With dead ends: 4302 [2021-06-05 15:05:46,258 INFO L226 Difference]: Without dead ends: 4267 [2021-06-05 15:05:46,258 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 615.9ms TimeCoverageRelationStatistics Valid=196, Invalid=860, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:05:46,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4267 states. [2021-06-05 15:05:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4267 to 3642. [2021-06-05 15:05:46,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.194452073606152) internal successors, (15272), 3641 states have internal predecessors, (15272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:46,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15272 transitions. [2021-06-05 15:05:46,309 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15272 transitions. Word has length 23 [2021-06-05 15:05:46,309 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:46,309 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15272 transitions. [2021-06-05 15:05:46,310 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:46,310 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15272 transitions. [2021-06-05 15:05:46,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:46,314 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:46,315 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:46,515 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 167 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable336 [2021-06-05 15:05:46,515 INFO L430 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:46,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:46,515 INFO L82 PathProgramCache]: Analyzing trace with hash 2096557637, now seen corresponding path program 48 times [2021-06-05 15:05:46,516 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:46,516 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631529818] [2021-06-05 15:05:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:46,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:46,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:46,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:46,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631529818] [2021-06-05 15:05:46,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631529818] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:46,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815821819] [2021-06-05 15:05:46,639 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:46,663 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:05:46,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:46,664 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:46,738 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:46,738 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:46,739 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:46,746 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:46,747 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:46,747 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:46,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:46,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815821819] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:46,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:46,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:46,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1968403129] [2021-06-05 15:05:46,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:46,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:46,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:46,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:46,826 INFO L87 Difference]: Start difference. First operand 3642 states and 15272 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:47,599 INFO L93 Difference]: Finished difference Result 4116 states and 17103 transitions. [2021-06-05 15:05:47,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:05:47,600 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:47,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:47,607 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 15:05:47,607 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 15:05:47,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 733.4ms TimeCoverageRelationStatistics Valid=241, Invalid=949, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:05:47,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 15:05:47,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3646. [2021-06-05 15:05:47,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 4.194238683127572) internal successors, (15288), 3645 states have internal predecessors, (15288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 15288 transitions. [2021-06-05 15:05:47,655 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 15288 transitions. Word has length 23 [2021-06-05 15:05:47,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:47,655 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 15288 transitions. [2021-06-05 15:05:47,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:47,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 15288 transitions. [2021-06-05 15:05:47,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:47,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:47,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:47,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable338,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:47,860 INFO L430 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:47,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:47,861 INFO L82 PathProgramCache]: Analyzing trace with hash -584842925, now seen corresponding path program 49 times [2021-06-05 15:05:47,861 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:47,861 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464755735] [2021-06-05 15:05:47,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:47,863 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:47,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:47,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464755735] [2021-06-05 15:05:47,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464755735] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:47,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1224450210] [2021-06-05 15:05:47,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:48,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:48,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:48,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:48,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:48,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:48,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:48,094 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:48,094 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:48,094 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:48,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1224450210] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:48,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:48,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:48,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708436847] [2021-06-05 15:05:48,172 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:48,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:48,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:48,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:48,172 INFO L87 Difference]: Start difference. First operand 3646 states and 15288 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:48,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:48,955 INFO L93 Difference]: Finished difference Result 4175 states and 17331 transitions. [2021-06-05 15:05:48,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:48,956 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:48,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:48,963 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 15:05:48,963 INFO L226 Difference]: Without dead ends: 4154 [2021-06-05 15:05:48,963 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 673.5ms TimeCoverageRelationStatistics Valid=193, Invalid=737, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:05:48,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4154 states. [2021-06-05 15:05:49,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4154 to 3626. [2021-06-05 15:05:49,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3626 states, 3625 states have (on average 4.1931034482758625) internal successors, (15200), 3625 states have internal predecessors, (15200), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3626 states to 3626 states and 15200 transitions. [2021-06-05 15:05:49,011 INFO L78 Accepts]: Start accepts. Automaton has 3626 states and 15200 transitions. Word has length 23 [2021-06-05 15:05:49,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:49,011 INFO L482 AbstractCegarLoop]: Abstraction has 3626 states and 15200 transitions. [2021-06-05 15:05:49,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:49,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3626 states and 15200 transitions. [2021-06-05 15:05:49,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:49,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:49,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:49,216 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable340,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:49,216 INFO L430 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:49,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:49,216 INFO L82 PathProgramCache]: Analyzing trace with hash -448592937, now seen corresponding path program 50 times [2021-06-05 15:05:49,216 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:49,217 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82378786] [2021-06-05 15:05:49,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:49,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:49,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:49,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:49,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82378786] [2021-06-05 15:05:49,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82378786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:49,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888386589] [2021-06-05 15:05:49,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:49,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:49,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:49,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:49,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:49,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:49,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:49,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:49,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:49,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:49,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:49,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:49,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [888386589] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:49,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:49,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:49,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358880714] [2021-06-05 15:05:49,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:49,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:49,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:49,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:49,522 INFO L87 Difference]: Start difference. First operand 3626 states and 15200 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:50,134 INFO L93 Difference]: Finished difference Result 4118 states and 17119 transitions. [2021-06-05 15:05:50,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:05:50,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:50,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:50,142 INFO L225 Difference]: With dead ends: 4118 [2021-06-05 15:05:50,142 INFO L226 Difference]: Without dead ends: 4096 [2021-06-05 15:05:50,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 468.9ms TimeCoverageRelationStatistics Valid=124, Invalid=632, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:05:50,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4096 states. [2021-06-05 15:05:50,179 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4096 to 3634. [2021-06-05 15:05:50,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3634 states, 3633 states have (on average 4.193503991191853) internal successors, (15235), 3633 states have internal predecessors, (15235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3634 states to 3634 states and 15235 transitions. [2021-06-05 15:05:50,189 INFO L78 Accepts]: Start accepts. Automaton has 3634 states and 15235 transitions. Word has length 23 [2021-06-05 15:05:50,189 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:50,189 INFO L482 AbstractCegarLoop]: Abstraction has 3634 states and 15235 transitions. [2021-06-05 15:05:50,189 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:50,189 INFO L276 IsEmpty]: Start isEmpty. Operand 3634 states and 15235 transitions. [2021-06-05 15:05:50,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:50,194 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:50,194 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:50,394 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 170 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable342 [2021-06-05 15:05:50,395 INFO L430 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:50,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:50,395 INFO L82 PathProgramCache]: Analyzing trace with hash 136741015, now seen corresponding path program 51 times [2021-06-05 15:05:50,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:50,395 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486371619] [2021-06-05 15:05:50,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:50,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:50,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:50,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:50,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486371619] [2021-06-05 15:05:50,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486371619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:50,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400371772] [2021-06-05 15:05:50,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:50,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:05:50,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:50,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:50,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:50,618 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:50,618 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:50,619 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:50,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:50,627 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:50,627 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:50,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:50,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1400371772] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:50,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:50,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:50,711 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780647249] [2021-06-05 15:05:50,711 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:50,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:50,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:50,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:50,711 INFO L87 Difference]: Start difference. First operand 3634 states and 15235 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:51,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:51,418 INFO L93 Difference]: Finished difference Result 3996 states and 16631 transitions. [2021-06-05 15:05:51,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:05:51,418 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:51,418 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:51,425 INFO L225 Difference]: With dead ends: 3996 [2021-06-05 15:05:51,425 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 15:05:51,425 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 649.8ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:51,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 15:05:51,484 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3638. [2021-06-05 15:05:51,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 15:05:51,494 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 15:05:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:51,494 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 15:05:51,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:51,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 15:05:51,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:51,499 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:51,499 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:51,700 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable344 [2021-06-05 15:05:51,700 INFO L430 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:51,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:51,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1750307749, now seen corresponding path program 52 times [2021-06-05 15:05:51,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:51,700 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577709498] [2021-06-05 15:05:51,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:51,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:51,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:51,820 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:51,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577709498] [2021-06-05 15:05:51,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577709498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:51,820 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645361283] [2021-06-05 15:05:51,820 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:51,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:51,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:51,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:51,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:51,925 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:51,925 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:51,926 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:51,934 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:51,934 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:51,934 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:52,015 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:52,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645361283] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:52,015 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:52,015 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:52,015 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759165184] [2021-06-05 15:05:52,015 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:52,015 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:52,015 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:52,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:52,016 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:52,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:52,740 INFO L93 Difference]: Finished difference Result 4014 states and 16703 transitions. [2021-06-05 15:05:52,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:05:52,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:52,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:52,747 INFO L225 Difference]: With dead ends: 4014 [2021-06-05 15:05:52,747 INFO L226 Difference]: Without dead ends: 3993 [2021-06-05 15:05:52,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 646.4ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:05:52,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3993 states. [2021-06-05 15:05:52,784 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3993 to 3630. [2021-06-05 15:05:52,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.193166161476991) internal successors, (15217), 3629 states have internal predecessors, (15217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:52,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15217 transitions. [2021-06-05 15:05:52,795 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15217 transitions. Word has length 23 [2021-06-05 15:05:52,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:52,795 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15217 transitions. [2021-06-05 15:05:52,795 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:52,795 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15217 transitions. [2021-06-05 15:05:52,800 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:52,800 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:52,800 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:53,000 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable346,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:53,001 INFO L430 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:53,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:53,001 INFO L82 PathProgramCache]: Analyzing trace with hash -675814317, now seen corresponding path program 53 times [2021-06-05 15:05:53,001 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:53,001 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528862261] [2021-06-05 15:05:53,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:53,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:53,115 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:53,115 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528862261] [2021-06-05 15:05:53,115 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528862261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:53,115 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624528776] [2021-06-05 15:05:53,115 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:53,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:53,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:53,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:53,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:53,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:53,237 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:05:53,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:53,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:53,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:53,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:05:53,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:53,307 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624528776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:53,307 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:53,307 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:53,307 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115358060] [2021-06-05 15:05:53,307 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:53,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:53,308 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:53,308 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:53,308 INFO L87 Difference]: Start difference. First operand 3630 states and 15217 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:53,810 INFO L93 Difference]: Finished difference Result 3988 states and 16595 transitions. [2021-06-05 15:05:53,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:05:53,810 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:53,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:53,817 INFO L225 Difference]: With dead ends: 3988 [2021-06-05 15:05:53,817 INFO L226 Difference]: Without dead ends: 3966 [2021-06-05 15:05:53,818 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 452.0ms TimeCoverageRelationStatistics Valid=131, Invalid=681, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:05:53,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3966 states. [2021-06-05 15:05:53,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3966 to 3636. [2021-06-05 15:05:53,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3636 states, 3635 states have (on average 4.193672627235213) internal successors, (15244), 3635 states have internal predecessors, (15244), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3636 states to 3636 states and 15244 transitions. [2021-06-05 15:05:53,868 INFO L78 Accepts]: Start accepts. Automaton has 3636 states and 15244 transitions. Word has length 23 [2021-06-05 15:05:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:53,868 INFO L482 AbstractCegarLoop]: Abstraction has 3636 states and 15244 transitions. [2021-06-05 15:05:53,868 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 3636 states and 15244 transitions. [2021-06-05 15:05:53,873 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:53,873 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:53,873 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:54,073 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable348 [2021-06-05 15:05:54,074 INFO L430 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:54,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:54,074 INFO L82 PathProgramCache]: Analyzing trace with hash -162287465, now seen corresponding path program 54 times [2021-06-05 15:05:54,074 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:54,074 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [686891476] [2021-06-05 15:05:54,074 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:54,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:54,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:54,194 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:54,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [686891476] [2021-06-05 15:05:54,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [686891476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:54,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [909972035] [2021-06-05 15:05:54,194 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:54,219 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:05:54,219 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:54,220 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:54,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:54,356 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:05:54,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 68 [2021-06-05 15:05:54,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:54,370 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:54,371 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:54,371 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 15:05:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:54,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [909972035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:54,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:54,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:05:54,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944951407] [2021-06-05 15:05:54,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:05:54,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:54,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:05:54,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:05:54,438 INFO L87 Difference]: Start difference. First operand 3636 states and 15244 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:55,071 INFO L93 Difference]: Finished difference Result 3940 states and 16403 transitions. [2021-06-05 15:05:55,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:05:55,071 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:55,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:55,078 INFO L225 Difference]: With dead ends: 3940 [2021-06-05 15:05:55,078 INFO L226 Difference]: Without dead ends: 3915 [2021-06-05 15:05:55,078 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=141, Invalid=851, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:05:55,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2021-06-05 15:05:55,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3640. [2021-06-05 15:05:55,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193459741687277) internal successors, (15260), 3639 states have internal predecessors, (15260), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15260 transitions. [2021-06-05 15:05:55,128 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15260 transitions. Word has length 23 [2021-06-05 15:05:55,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:55,128 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15260 transitions. [2021-06-05 15:05:55,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:55,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15260 transitions. [2021-06-05 15:05:55,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:55,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:55,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:55,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable350,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:55,333 INFO L430 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:55,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:55,334 INFO L82 PathProgramCache]: Analyzing trace with hash 913423691, now seen corresponding path program 55 times [2021-06-05 15:05:55,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:55,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638972500] [2021-06-05 15:05:55,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:55,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:55,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:55,448 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638972500] [2021-06-05 15:05:55,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1638972500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:55,448 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520663988] [2021-06-05 15:05:55,448 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:55,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:55,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:55,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:55,551 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:55,551 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:55,552 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:55,560 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:55,561 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:55,561 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:05:55,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:55,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [520663988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:55,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:55,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:55,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406454838] [2021-06-05 15:05:55,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:55,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:55,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:55,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:55,641 INFO L87 Difference]: Start difference. First operand 3640 states and 15260 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:56,172 INFO L93 Difference]: Finished difference Result 3936 states and 16385 transitions. [2021-06-05 15:05:56,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:05:56,172 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:56,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:56,179 INFO L225 Difference]: With dead ends: 3936 [2021-06-05 15:05:56,179 INFO L226 Difference]: Without dead ends: 3915 [2021-06-05 15:05:56,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 453.7ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:56,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3915 states. [2021-06-05 15:05:56,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3915 to 3632. [2021-06-05 15:05:56,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3632 states, 3631 states have (on average 4.193335169374828) internal successors, (15226), 3631 states have internal predecessors, (15226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3632 states to 3632 states and 15226 transitions. [2021-06-05 15:05:56,225 INFO L78 Accepts]: Start accepts. Automaton has 3632 states and 15226 transitions. Word has length 23 [2021-06-05 15:05:56,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:56,225 INFO L482 AbstractCegarLoop]: Abstraction has 3632 states and 15226 transitions. [2021-06-05 15:05:56,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:56,225 INFO L276 IsEmpty]: Start isEmpty. Operand 3632 states and 15226 transitions. [2021-06-05 15:05:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:56,230 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:56,230 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:56,430 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable354 [2021-06-05 15:05:56,431 INFO L430 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:56,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:56,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1194419543, now seen corresponding path program 56 times [2021-06-05 15:05:56,431 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:56,431 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303648542] [2021-06-05 15:05:56,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:56,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:56,551 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:56,551 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:56,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303648542] [2021-06-05 15:05:56,551 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [303648542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,551 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79600955] [2021-06-05 15:05:56,551 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:56,575 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:05:56,575 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:56,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:56,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:56,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:56,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:56,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:56,652 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:56,652 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:56,653 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:56,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:56,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79600955] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:56,756 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:56,756 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:56,756 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284601281] [2021-06-05 15:05:56,757 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:56,757 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:56,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:56,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:56,757 INFO L87 Difference]: Start difference. First operand 3632 states and 15226 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:57,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:57,301 INFO L93 Difference]: Finished difference Result 3969 states and 16526 transitions. [2021-06-05 15:05:57,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:05:57,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:57,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:57,308 INFO L225 Difference]: With dead ends: 3969 [2021-06-05 15:05:57,308 INFO L226 Difference]: Without dead ends: 3943 [2021-06-05 15:05:57,309 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 503.3ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:05:57,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3943 states. [2021-06-05 15:05:57,346 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3943 to 3641. [2021-06-05 15:05:57,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 4.191758241758242) internal successors, (15258), 3640 states have internal predecessors, (15258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 15258 transitions. [2021-06-05 15:05:57,356 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 15258 transitions. Word has length 23 [2021-06-05 15:05:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:57,356 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 15258 transitions. [2021-06-05 15:05:57,357 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:57,357 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 15258 transitions. [2021-06-05 15:05:57,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:57,362 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:57,362 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:57,562 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable356 [2021-06-05 15:05:57,562 INFO L430 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:57,562 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:57,562 INFO L82 PathProgramCache]: Analyzing trace with hash 152843475, now seen corresponding path program 57 times [2021-06-05 15:05:57,562 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:57,562 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378582033] [2021-06-05 15:05:57,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:57,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:57,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:57,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:57,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378582033] [2021-06-05 15:05:57,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378582033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:57,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226878973] [2021-06-05 15:05:57,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:57,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:05:57,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:57,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:57,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:57,777 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:57,778 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:57,779 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:57,788 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:57,789 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:57,789 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:57,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:57,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226878973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:57,898 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:57,898 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:57,898 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57034835] [2021-06-05 15:05:57,898 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:57,898 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:57,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:57,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:57,899 INFO L87 Difference]: Start difference. First operand 3641 states and 15258 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,513 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:58,513 INFO L93 Difference]: Finished difference Result 3976 states and 16549 transitions. [2021-06-05 15:05:58,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:58,513 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:58,513 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:58,520 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 15:05:58,520 INFO L226 Difference]: Without dead ends: 3948 [2021-06-05 15:05:58,520 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 510.6ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:05:58,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3948 states. [2021-06-05 15:05:58,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3948 to 3638. [2021-06-05 15:05:58,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 15:05:58,567 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 15:05:58,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:58,568 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 15:05:58,568 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:58,568 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 15:05:58,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:58,573 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:58,573 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:58,773 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 177 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable358 [2021-06-05 15:05:58,773 INFO L430 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:58,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:58,773 INFO L82 PathProgramCache]: Analyzing trace with hash -134277877, now seen corresponding path program 58 times [2021-06-05 15:05:58,773 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:58,773 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730035118] [2021-06-05 15:05:58,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:58,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:58,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:58,903 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:05:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730035118] [2021-06-05 15:05:58,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730035118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:58,903 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382618857] [2021-06-05 15:05:58,903 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:58,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:05:58,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:05:58,928 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:05:58,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:05:58,995 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:58,995 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:05:58,996 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:05:59,005 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:05:59,005 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:05:59,005 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:05:59,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:59,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [382618857] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:05:59,108 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:05:59,108 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:05:59,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343055417] [2021-06-05 15:05:59,108 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:05:59,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:05:59,108 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:05:59,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:05:59,109 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:05:59,608 INFO L93 Difference]: Finished difference Result 3893 states and 16217 transitions. [2021-06-05 15:05:59,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:05:59,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:05:59,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:05:59,615 INFO L225 Difference]: With dead ends: 3893 [2021-06-05 15:05:59,615 INFO L226 Difference]: Without dead ends: 3867 [2021-06-05 15:05:59,616 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 544.9ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:05:59,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3867 states. [2021-06-05 15:05:59,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3867 to 3642. [2021-06-05 15:05:59,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.192804174677287) internal successors, (15266), 3641 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15266 transitions. [2021-06-05 15:05:59,663 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15266 transitions. Word has length 23 [2021-06-05 15:05:59,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:05:59,663 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15266 transitions. [2021-06-05 15:05:59,663 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:05:59,663 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15266 transitions. [2021-06-05 15:05:59,668 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:05:59,668 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:05:59,668 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:05:59,868 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable360,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:05:59,868 INFO L430 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:05:59,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:05:59,869 INFO L82 PathProgramCache]: Analyzing trace with hash -627495263, now seen corresponding path program 59 times [2021-06-05 15:05:59,869 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:05:59,869 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750153974] [2021-06-05 15:05:59,869 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:05:59,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:05:59,999 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:05:59,999 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:00,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750153974] [2021-06-05 15:06:00,000 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750153974] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:00,000 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1406143048] [2021-06-05 15:06:00,000 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:00,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:00,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:00,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:00,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:00,092 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:00,092 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:00,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:00,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:00,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:00,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:00,205 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:00,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1406143048] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:00,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:00,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:00,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999664254] [2021-06-05 15:06:00,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:00,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:00,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:00,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:00,206 INFO L87 Difference]: Start difference. First operand 3642 states and 15266 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:00,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:00,762 INFO L93 Difference]: Finished difference Result 3906 states and 16269 transitions. [2021-06-05 15:06:00,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:00,762 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:00,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:00,769 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 15:06:00,769 INFO L226 Difference]: Without dead ends: 3885 [2021-06-05 15:06:00,769 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 528.4ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:00,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-06-05 15:06:00,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3638. [2021-06-05 15:06:00,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:00,816 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 15:06:00,816 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 15:06:00,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:00,816 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 15:06:00,816 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:00,816 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 15:06:00,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:00,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:00,821 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:01,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable362,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:01,022 INFO L430 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:01,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:01,022 INFO L82 PathProgramCache]: Analyzing trace with hash 307280993, now seen corresponding path program 60 times [2021-06-05 15:06:01,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:01,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561996892] [2021-06-05 15:06:01,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:01,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:01,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:01,157 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:01,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561996892] [2021-06-05 15:06:01,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561996892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:01,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [633577358] [2021-06-05 15:06:01,158 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:01,182 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:01,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:01,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:01,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:01,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:01,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:01,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:01,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:01,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:01,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:01,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:01,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [633577358] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:01,361 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:01,361 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:01,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531855143] [2021-06-05 15:06:01,361 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:01,361 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:01,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:01,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:01,361 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:01,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:01,893 INFO L93 Difference]: Finished difference Result 3896 states and 16227 transitions. [2021-06-05 15:06:01,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:06:01,893 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:01,893 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:01,900 INFO L225 Difference]: With dead ends: 3896 [2021-06-05 15:06:01,900 INFO L226 Difference]: Without dead ends: 3871 [2021-06-05 15:06:01,900 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 506.6ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:01,903 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3871 states. [2021-06-05 15:06:01,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3871 to 3642. [2021-06-05 15:06:01,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3642 states, 3641 states have (on average 4.192804174677287) internal successors, (15266), 3641 states have internal predecessors, (15266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:01,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3642 states to 3642 states and 15266 transitions. [2021-06-05 15:06:01,947 INFO L78 Accepts]: Start accepts. Automaton has 3642 states and 15266 transitions. Word has length 23 [2021-06-05 15:06:01,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:01,947 INFO L482 AbstractCegarLoop]: Abstraction has 3642 states and 15266 transitions. [2021-06-05 15:06:01,947 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:01,947 INFO L276 IsEmpty]: Start isEmpty. Operand 3642 states and 15266 transitions. [2021-06-05 15:06:01,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:01,952 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:01,952 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:02,152 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable364,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:02,152 INFO L430 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:02,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:02,153 INFO L82 PathProgramCache]: Analyzing trace with hash -705411539, now seen corresponding path program 61 times [2021-06-05 15:06:02,153 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:02,153 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074587697] [2021-06-05 15:06:02,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:02,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:02,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:02,299 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:02,299 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074587697] [2021-06-05 15:06:02,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074587697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:02,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1764223130] [2021-06-05 15:06:02,300 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:02,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:02,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:02,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:02,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:02,391 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:02,392 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:02,400 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:02,401 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:02,401 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:02,506 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:02,506 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1764223130] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:02,506 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:02,506 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:02,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2058287942] [2021-06-05 15:06:02,507 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:02,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:02,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:02,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:02,507 INFO L87 Difference]: Start difference. First operand 3642 states and 15266 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:02,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:02,960 INFO L93 Difference]: Finished difference Result 3910 states and 16281 transitions. [2021-06-05 15:06:02,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:06:02,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:02,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:02,966 INFO L225 Difference]: With dead ends: 3910 [2021-06-05 15:06:02,967 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 15:06:02,967 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 449.7ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:02,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 15:06:03,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3638. [2021-06-05 15:06:03,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193016222161122) internal successors, (15250), 3637 states have internal predecessors, (15250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:03,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15250 transitions. [2021-06-05 15:06:03,014 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15250 transitions. Word has length 23 [2021-06-05 15:06:03,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:03,015 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15250 transitions. [2021-06-05 15:06:03,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:03,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15250 transitions. [2021-06-05 15:06:03,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:03,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:03,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:03,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 181 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable366 [2021-06-05 15:06:03,220 INFO L430 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:03,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:03,220 INFO L82 PathProgramCache]: Analyzing trace with hash 443454581, now seen corresponding path program 62 times [2021-06-05 15:06:03,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:03,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513720526] [2021-06-05 15:06:03,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:03,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:03,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:03,340 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:03,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513720526] [2021-06-05 15:06:03,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513720526] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:03,340 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479773663] [2021-06-05 15:06:03,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:03,365 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:03,365 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:03,366 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:03,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:03,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:03,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:03,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:03,473 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:03,473 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:03,473 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:03,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:03,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479773663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:03,537 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:03,537 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:03,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281026040] [2021-06-05 15:06:03,537 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:03,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:03,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:03,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:03,538 INFO L87 Difference]: Start difference. First operand 3638 states and 15250 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:04,027 INFO L93 Difference]: Finished difference Result 4062 states and 16894 transitions. [2021-06-05 15:06:04,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:06:04,028 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:04,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:04,035 INFO L225 Difference]: With dead ends: 4062 [2021-06-05 15:06:04,035 INFO L226 Difference]: Without dead ends: 4027 [2021-06-05 15:06:04,035 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 388.0ms TimeCoverageRelationStatistics Valid=110, Invalid=540, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:04,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4027 states. [2021-06-05 15:06:04,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4027 to 3638. [2021-06-05 15:06:04,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.19191641462744) internal successors, (15246), 3637 states have internal predecessors, (15246), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15246 transitions. [2021-06-05 15:06:04,084 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15246 transitions. Word has length 23 [2021-06-05 15:06:04,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:04,084 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15246 transitions. [2021-06-05 15:06:04,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:04,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15246 transitions. [2021-06-05 15:06:04,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:04,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:04,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:04,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable368,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:04,289 INFO L430 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:04,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:04,290 INFO L82 PathProgramCache]: Analyzing trace with hash -2106228679, now seen corresponding path program 63 times [2021-06-05 15:06:04,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:04,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544901861] [2021-06-05 15:06:04,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:04,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:04,406 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:04,406 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:04,406 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544901861] [2021-06-05 15:06:04,406 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544901861] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:04,407 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630967724] [2021-06-05 15:06:04,407 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:04,431 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:04,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:04,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:04,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:04,544 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:06:04,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:06:04,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:06:04,571 INFO L628 ElimStorePlain]: treesize reduction 53, result has 24.3 percent of original size [2021-06-05 15:06:04,572 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:04,572 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 15:06:04,635 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:04,635 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1630967724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:04,635 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:04,635 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:06:04,635 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21663855] [2021-06-05 15:06:04,635 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:04,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:04,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:04,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:04,636 INFO L87 Difference]: Start difference. First operand 3638 states and 15246 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:05,292 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:05,293 INFO L93 Difference]: Finished difference Result 4000 states and 16643 transitions. [2021-06-05 15:06:05,293 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:06:05,293 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:05,293 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:05,300 INFO L225 Difference]: With dead ends: 4000 [2021-06-05 15:06:05,300 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 15:06:05,300 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 472.6ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:05,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 15:06:05,338 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3645. [2021-06-05 15:06:05,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.190450054884742) internal successors, (15270), 3644 states have internal predecessors, (15270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:05,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15270 transitions. [2021-06-05 15:06:05,350 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15270 transitions. Word has length 23 [2021-06-05 15:06:05,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:05,350 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15270 transitions. [2021-06-05 15:06:05,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:05,350 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15270 transitions. [2021-06-05 15:06:05,355 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:05,355 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:05,355 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:05,555 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable370 [2021-06-05 15:06:05,555 INFO L430 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:05,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:05,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1147162549, now seen corresponding path program 64 times [2021-06-05 15:06:05,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:05,556 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1838348267] [2021-06-05 15:06:05,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:05,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:05,675 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:05,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1838348267] [2021-06-05 15:06:05,675 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1838348267] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:05,675 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720051140] [2021-06-05 15:06:05,675 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:05,699 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:05,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:05,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:05,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:05,779 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:05,779 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:05,781 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:05,789 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:05,790 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:05,790 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:06:05,873 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:05,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720051140] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:05,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:05,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:05,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738927691] [2021-06-05 15:06:05,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:05,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:05,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:05,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:05,873 INFO L87 Difference]: Start difference. First operand 3645 states and 15270 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:06,403 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:06,404 INFO L93 Difference]: Finished difference Result 4011 states and 16687 transitions. [2021-06-05 15:06:06,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:06:06,404 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:06,404 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:06,411 INFO L225 Difference]: With dead ends: 4011 [2021-06-05 15:06:06,411 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 15:06:06,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 490.3ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:06:06,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 15:06:06,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3638. [2021-06-05 15:06:06,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:06,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 15:06:06,458 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 15:06:06,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:06,458 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 15:06:06,458 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:06,458 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 15:06:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:06,463 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:06,463 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:06,663 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable374,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:06,663 INFO L430 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:06,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:06,664 INFO L82 PathProgramCache]: Analyzing trace with hash -2091459775, now seen corresponding path program 65 times [2021-06-05 15:06:06,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:06,664 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294467625] [2021-06-05 15:06:06,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:06,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:06,782 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:06,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294467625] [2021-06-05 15:06:06,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294467625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:06,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32991247] [2021-06-05 15:06:06,782 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:06,807 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:06,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:06,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:06,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:06,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:06,903 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:06,904 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:06,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:06,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:06,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:06,976 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:06,976 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32991247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:06,976 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:06,976 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:06,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [692395216] [2021-06-05 15:06:06,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:06,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:06,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:06,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:06,977 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:07,532 INFO L93 Difference]: Finished difference Result 4211 states and 17480 transitions. [2021-06-05 15:06:07,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:06:07,532 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:07,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:07,539 INFO L225 Difference]: With dead ends: 4211 [2021-06-05 15:06:07,539 INFO L226 Difference]: Without dead ends: 4176 [2021-06-05 15:06:07,539 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 484.5ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:07,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4176 states. [2021-06-05 15:06:07,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4176 to 3646. [2021-06-05 15:06:07,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3646 states, 3645 states have (on average 4.193415637860082) internal successors, (15285), 3645 states have internal predecessors, (15285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,587 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3646 states to 3646 states and 15285 transitions. [2021-06-05 15:06:07,587 INFO L78 Accepts]: Start accepts. Automaton has 3646 states and 15285 transitions. Word has length 23 [2021-06-05 15:06:07,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:07,587 INFO L482 AbstractCegarLoop]: Abstraction has 3646 states and 15285 transitions. [2021-06-05 15:06:07,587 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:07,587 INFO L276 IsEmpty]: Start isEmpty. Operand 3646 states and 15285 transitions. [2021-06-05 15:06:07,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:07,592 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:07,592 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:07,793 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable376 [2021-06-05 15:06:07,793 INFO L430 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:07,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:07,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1399108297, now seen corresponding path program 66 times [2021-06-05 15:06:07,793 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:07,793 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176281981] [2021-06-05 15:06:07,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:07,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:07,911 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:07,911 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176281981] [2021-06-05 15:06:07,911 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176281981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:07,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1640306311] [2021-06-05 15:06:07,911 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:07,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:07,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:07,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:07,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:08,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:08,017 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:08,018 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:08,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:08,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:08,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:08,106 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:08,106 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1640306311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:08,106 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:08,106 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:08,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848200405] [2021-06-05 15:06:08,106 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:08,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:08,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:08,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:08,107 INFO L87 Difference]: Start difference. First operand 3646 states and 15285 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:08,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:08,781 INFO L93 Difference]: Finished difference Result 4064 states and 16897 transitions. [2021-06-05 15:06:08,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:08,781 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:08,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:08,788 INFO L225 Difference]: With dead ends: 4064 [2021-06-05 15:06:08,788 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 15:06:08,789 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:08,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 15:06:08,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3650. [2021-06-05 15:06:08,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3650 states, 3649 states have (on average 4.1932036174294325) internal successors, (15301), 3649 states have internal predecessors, (15301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:08,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3650 states to 3650 states and 15301 transitions. [2021-06-05 15:06:08,836 INFO L78 Accepts]: Start accepts. Automaton has 3650 states and 15301 transitions. Word has length 23 [2021-06-05 15:06:08,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:08,836 INFO L482 AbstractCegarLoop]: Abstraction has 3650 states and 15301 transitions. [2021-06-05 15:06:08,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:08,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3650 states and 15301 transitions. [2021-06-05 15:06:08,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:08,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:08,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:09,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable378 [2021-06-05 15:06:09,041 INFO L430 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:09,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:09,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1282292265, now seen corresponding path program 67 times [2021-06-05 15:06:09,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:09,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000295459] [2021-06-05 15:06:09,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:09,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:09,169 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:09,169 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:09,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000295459] [2021-06-05 15:06:09,170 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000295459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:09,170 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360964347] [2021-06-05 15:06:09,170 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:09,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:09,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:09,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:09,274 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:09,275 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:09,276 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:09,283 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:09,284 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:09,284 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:09,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:09,364 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [360964347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:09,364 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:09,364 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:09,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329632400] [2021-06-05 15:06:09,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:09,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:09,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:09,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:09,365 INFO L87 Difference]: Start difference. First operand 3650 states and 15301 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:10,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:10,097 INFO L93 Difference]: Finished difference Result 4120 states and 17113 transitions. [2021-06-05 15:06:10,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:06:10,097 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:10,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:10,104 INFO L225 Difference]: With dead ends: 4120 [2021-06-05 15:06:10,104 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 15:06:10,105 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 632.4ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:10,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 15:06:10,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3638. [2021-06-05 15:06:10,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3638 states, 3637 states have (on average 4.193291174044542) internal successors, (15251), 3637 states have internal predecessors, (15251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:10,153 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3638 states to 3638 states and 15251 transitions. [2021-06-05 15:06:10,153 INFO L78 Accepts]: Start accepts. Automaton has 3638 states and 15251 transitions. Word has length 23 [2021-06-05 15:06:10,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:10,154 INFO L482 AbstractCegarLoop]: Abstraction has 3638 states and 15251 transitions. [2021-06-05 15:06:10,154 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:10,154 INFO L276 IsEmpty]: Start isEmpty. Operand 3638 states and 15251 transitions. [2021-06-05 15:06:10,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:10,159 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:10,159 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:10,359 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable380,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:10,359 INFO L430 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:10,359 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:10,359 INFO L82 PathProgramCache]: Analyzing trace with hash -1191147191, now seen corresponding path program 68 times [2021-06-05 15:06:10,359 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:10,359 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261162988] [2021-06-05 15:06:10,360 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:10,361 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:10,478 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:10,478 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261162988] [2021-06-05 15:06:10,478 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261162988] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,478 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [349860254] [2021-06-05 15:06:10,478 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:10,502 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:10,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:10,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:10,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:10,569 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:10,569 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:10,570 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,579 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:10,579 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:10,579 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:10,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:10,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [349860254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:10,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:10,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:10,686 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [964922934] [2021-06-05 15:06:10,686 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:10,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:10,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:10,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:10,686 INFO L87 Difference]: Start difference. First operand 3638 states and 15251 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:11,198 INFO L93 Difference]: Finished difference Result 3976 states and 16555 transitions. [2021-06-05 15:06:11,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:11,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:11,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:11,205 INFO L225 Difference]: With dead ends: 3976 [2021-06-05 15:06:11,205 INFO L226 Difference]: Without dead ends: 3950 [2021-06-05 15:06:11,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 105 ImplicationChecksByTransitivity, 491.3ms TimeCoverageRelationStatistics Valid=130, Invalid=572, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:06:11,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3950 states. [2021-06-05 15:06:11,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3950 to 3647. [2021-06-05 15:06:11,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3647 states, 3646 states have (on average 4.191716950082282) internal successors, (15283), 3646 states have internal predecessors, (15283), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3647 states to 3647 states and 15283 transitions. [2021-06-05 15:06:11,253 INFO L78 Accepts]: Start accepts. Automaton has 3647 states and 15283 transitions. Word has length 23 [2021-06-05 15:06:11,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:11,253 INFO L482 AbstractCegarLoop]: Abstraction has 3647 states and 15283 transitions. [2021-06-05 15:06:11,253 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:11,253 INFO L276 IsEmpty]: Start isEmpty. Operand 3647 states and 15283 transitions. [2021-06-05 15:06:11,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:11,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:11,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:11,458 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable382,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:11,458 INFO L430 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:11,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:11,458 INFO L82 PathProgramCache]: Analyzing trace with hash 2062244037, now seen corresponding path program 69 times [2021-06-05 15:06:11,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:11,459 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440724228] [2021-06-05 15:06:11,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:11,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:11,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:11,576 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:11,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440724228] [2021-06-05 15:06:11,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440724228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:11,576 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770136441] [2021-06-05 15:06:11,577 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:11,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:11,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:11,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:11,602 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:11,695 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:06:11,696 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:06:11,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:11,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:11,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:11,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 15:06:11,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:11,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770136441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:11,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:11,805 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:06:11,805 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1913012832] [2021-06-05 15:06:11,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:11,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:11,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:11,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:11,806 INFO L87 Difference]: Start difference. First operand 3647 states and 15283 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:12,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:12,500 INFO L93 Difference]: Finished difference Result 3937 states and 16396 transitions. [2021-06-05 15:06:12,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:06:12,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:12,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:12,506 INFO L225 Difference]: With dead ends: 3937 [2021-06-05 15:06:12,507 INFO L226 Difference]: Without dead ends: 3909 [2021-06-05 15:06:12,507 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 565.2ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:06:12,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3909 states. [2021-06-05 15:06:12,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3909 to 3640. [2021-06-05 15:06:12,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:12,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 15:06:12,577 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 15:06:12,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:12,577 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 15:06:12,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:12,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 15:06:12,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:12,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:12,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:12,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable384,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:12,782 INFO L430 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:12,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:12,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1775122685, now seen corresponding path program 70 times [2021-06-05 15:06:12,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:12,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254660029] [2021-06-05 15:06:12,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:12,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:12,927 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:12,927 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254660029] [2021-06-05 15:06:12,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254660029] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:12,928 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [937617817] [2021-06-05 15:06:12,928 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:12,951 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:12,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:12,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:12,952 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:13,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:13,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:13,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:13,028 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:13,029 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:13,029 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:13,129 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:13,129 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [937617817] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:13,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:13,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:13,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349975816] [2021-06-05 15:06:13,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:13,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:13,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:13,130 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:13,669 INFO L93 Difference]: Finished difference Result 3892 states and 16214 transitions. [2021-06-05 15:06:13,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:06:13,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:13,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:13,676 INFO L225 Difference]: With dead ends: 3892 [2021-06-05 15:06:13,676 INFO L226 Difference]: Without dead ends: 3866 [2021-06-05 15:06:13,676 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 534.8ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:06:13,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3866 states. [2021-06-05 15:06:13,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3866 to 3644. [2021-06-05 15:06:13,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 4.192972824595114) internal successors, (15275), 3643 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 15275 transitions. [2021-06-05 15:06:13,724 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 15275 transitions. Word has length 23 [2021-06-05 15:06:13,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:13,724 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 15275 transitions. [2021-06-05 15:06:13,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:13,725 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 15275 transitions. [2021-06-05 15:06:13,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:13,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:13,730 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:13,930 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable388 [2021-06-05 15:06:13,930 INFO L430 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:13,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:13,930 INFO L82 PathProgramCache]: Analyzing trace with hash 1281905299, now seen corresponding path program 71 times [2021-06-05 15:06:13,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:13,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199627862] [2021-06-05 15:06:13,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:13,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:14,083 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:14,083 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:14,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199627862] [2021-06-05 15:06:14,083 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199627862] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:14,083 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [797481200] [2021-06-05 15:06:14,083 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:14,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:14,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:14,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:14,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:14,182 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:14,183 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:14,184 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:14,192 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:14,193 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:14,193 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:14,293 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:14,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [797481200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:14,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:14,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:14,294 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [947412576] [2021-06-05 15:06:14,294 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:14,294 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:14,294 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:14,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:14,294 INFO L87 Difference]: Start difference. First operand 3644 states and 15275 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:14,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:14,829 INFO L93 Difference]: Finished difference Result 3906 states and 16270 transitions. [2021-06-05 15:06:14,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:14,830 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:14,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:14,836 INFO L225 Difference]: With dead ends: 3906 [2021-06-05 15:06:14,836 INFO L226 Difference]: Without dead ends: 3885 [2021-06-05 15:06:14,836 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 546.5ms TimeCoverageRelationStatistics Valid=122, Invalid=528, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:14,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3885 states. [2021-06-05 15:06:14,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3885 to 3640. [2021-06-05 15:06:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:14,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 15:06:14,883 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 15:06:14,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:14,883 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 15:06:14,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:14,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 15:06:14,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:14,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:14,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:15,089 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable390,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:15,090 INFO L430 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:15,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:15,090 INFO L82 PathProgramCache]: Analyzing trace with hash -2078285741, now seen corresponding path program 72 times [2021-06-05 15:06:15,090 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:15,090 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1004658340] [2021-06-05 15:06:15,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:15,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:15,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:15,213 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1004658340] [2021-06-05 15:06:15,213 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1004658340] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:15,213 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838168350] [2021-06-05 15:06:15,213 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:15,241 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:15,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:15,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:15,242 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:15,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:15,330 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:15,331 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:15,340 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:15,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:15,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:15,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:15,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838168350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:15,437 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:15,437 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:15,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [372245407] [2021-06-05 15:06:15,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:15,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:15,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:15,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:15,438 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:15,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:15,984 INFO L93 Difference]: Finished difference Result 3895 states and 16224 transitions. [2021-06-05 15:06:15,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:06:15,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:15,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:15,991 INFO L225 Difference]: With dead ends: 3895 [2021-06-05 15:06:15,991 INFO L226 Difference]: Without dead ends: 3870 [2021-06-05 15:06:15,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 523.8ms TimeCoverageRelationStatistics Valid=168, Invalid=702, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:15,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3870 states. [2021-06-05 15:06:16,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3870 to 3644. [2021-06-05 15:06:16,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3644 states, 3643 states have (on average 4.192972824595114) internal successors, (15275), 3643 states have internal predecessors, (15275), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3644 states to 3644 states and 15275 transitions. [2021-06-05 15:06:16,039 INFO L78 Accepts]: Start accepts. Automaton has 3644 states and 15275 transitions. Word has length 23 [2021-06-05 15:06:16,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:16,040 INFO L482 AbstractCegarLoop]: Abstraction has 3644 states and 15275 transitions. [2021-06-05 15:06:16,040 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:16,040 INFO L276 IsEmpty]: Start isEmpty. Operand 3644 states and 15275 transitions. [2021-06-05 15:06:16,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:16,045 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:16,045 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:16,252 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable392,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:16,253 INFO L430 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:16,253 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:16,253 INFO L82 PathProgramCache]: Analyzing trace with hash 1203989023, now seen corresponding path program 73 times [2021-06-05 15:06:16,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:16,253 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377928920] [2021-06-05 15:06:16,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:16,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:16,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:16,378 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377928920] [2021-06-05 15:06:16,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [377928920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:16,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1624164663] [2021-06-05 15:06:16,379 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:16,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:16,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:16,408 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:16,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:16,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:16,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:16,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:16,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:16,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:16,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:16,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1624164663] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:16,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:16,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:16,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621824484] [2021-06-05 15:06:16,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:16,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:16,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:16,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:16,589 INFO L87 Difference]: Start difference. First operand 3644 states and 15275 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:17,064 INFO L93 Difference]: Finished difference Result 3910 states and 16282 transitions. [2021-06-05 15:06:17,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:06:17,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:17,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:17,071 INFO L225 Difference]: With dead ends: 3910 [2021-06-05 15:06:17,071 INFO L226 Difference]: Without dead ends: 3889 [2021-06-05 15:06:17,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 434.0ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:17,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3889 states. [2021-06-05 15:06:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3889 to 3640. [2021-06-05 15:06:17,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3640 states, 3639 states have (on average 4.193184940917835) internal successors, (15259), 3639 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3640 states to 3640 states and 15259 transitions. [2021-06-05 15:06:17,119 INFO L78 Accepts]: Start accepts. Automaton has 3640 states and 15259 transitions. Word has length 23 [2021-06-05 15:06:17,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:17,120 INFO L482 AbstractCegarLoop]: Abstraction has 3640 states and 15259 transitions. [2021-06-05 15:06:17,120 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:17,120 INFO L276 IsEmpty]: Start isEmpty. Operand 3640 states and 15259 transitions. [2021-06-05 15:06:17,125 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:17,125 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:17,125 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:17,325 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable394,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:17,325 INFO L430 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:17,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:17,325 INFO L82 PathProgramCache]: Analyzing trace with hash 859421919, now seen corresponding path program 74 times [2021-06-05 15:06:17,326 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:17,326 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207970122] [2021-06-05 15:06:17,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:17,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:17,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:17,444 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207970122] [2021-06-05 15:06:17,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207970122] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,444 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180184173] [2021-06-05 15:06:17,444 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:17,469 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:17,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:17,469 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:17,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:17,559 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:17,559 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:17,561 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:17,569 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:17,569 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:17,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:17,627 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180184173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:17,627 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:17,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:17,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105816621] [2021-06-05 15:06:17,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:17,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:17,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:17,628 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:17,628 INFO L87 Difference]: Start difference. First operand 3640 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:18,213 INFO L93 Difference]: Finished difference Result 4232 states and 17572 transitions. [2021-06-05 15:06:18,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:18,213 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:18,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:18,220 INFO L225 Difference]: With dead ends: 4232 [2021-06-05 15:06:18,220 INFO L226 Difference]: Without dead ends: 4210 [2021-06-05 15:06:18,220 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 565.5ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:18,224 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-06-05 15:06:18,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3652. [2021-06-05 15:06:18,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3652 states, 3651 states have (on average 4.191454396055875) internal successors, (15303), 3651 states have internal predecessors, (15303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3652 states to 3652 states and 15303 transitions. [2021-06-05 15:06:18,271 INFO L78 Accepts]: Start accepts. Automaton has 3652 states and 15303 transitions. Word has length 23 [2021-06-05 15:06:18,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:18,271 INFO L482 AbstractCegarLoop]: Abstraction has 3652 states and 15303 transitions. [2021-06-05 15:06:18,271 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:18,271 INFO L276 IsEmpty]: Start isEmpty. Operand 3652 states and 15303 transitions. [2021-06-05 15:06:18,276 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:18,276 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:18,276 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:18,476 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable396,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:18,476 INFO L430 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:18,477 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:18,477 INFO L82 PathProgramCache]: Analyzing trace with hash 1444755871, now seen corresponding path program 75 times [2021-06-05 15:06:18,477 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:18,477 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2096597259] [2021-06-05 15:06:18,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:18,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:18,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2096597259] [2021-06-05 15:06:18,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2096597259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:18,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471434550] [2021-06-05 15:06:18,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:18,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:06:18,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:18,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:18,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:18,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:18,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:18,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:18,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:18,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:18,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:18,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:18,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471434550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:18,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:18,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:18,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [873552354] [2021-06-05 15:06:18,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:18,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:18,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:18,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:18,815 INFO L87 Difference]: Start difference. First operand 3652 states and 15303 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:19,669 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:19,669 INFO L93 Difference]: Finished difference Result 4128 states and 17141 transitions. [2021-06-05 15:06:19,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:06:19,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:19,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:19,676 INFO L225 Difference]: With dead ends: 4128 [2021-06-05 15:06:19,676 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 15:06:19,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 760.2ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:06:19,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 15:06:19,714 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3656. [2021-06-05 15:06:19,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191244870041039) internal successors, (15319), 3655 states have internal predecessors, (15319), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:19,724 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15319 transitions. [2021-06-05 15:06:19,724 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15319 transitions. Word has length 23 [2021-06-05 15:06:19,724 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:19,724 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15319 transitions. [2021-06-05 15:06:19,724 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:19,724 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15319 transitions. [2021-06-05 15:06:19,729 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:19,729 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:19,729 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:19,929 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable398 [2021-06-05 15:06:19,930 INFO L430 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:19,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:19,930 INFO L82 PathProgramCache]: Analyzing trace with hash -1236644691, now seen corresponding path program 76 times [2021-06-05 15:06:19,930 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:19,930 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519185750] [2021-06-05 15:06:19,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:19,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:20,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:20,057 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:20,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519185750] [2021-06-05 15:06:20,057 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [519185750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:20,057 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511403711] [2021-06-05 15:06:20,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:20,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:20,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:20,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:20,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:20,157 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:20,157 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:20,158 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:20,166 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:20,166 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:20,166 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:20,243 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:20,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511403711] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:20,243 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:20,243 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:20,243 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469603725] [2021-06-05 15:06:20,243 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:20,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:20,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:20,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:20,243 INFO L87 Difference]: Start difference. First operand 3656 states and 15319 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:20,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:20,973 INFO L93 Difference]: Finished difference Result 4082 states and 16965 transitions. [2021-06-05 15:06:20,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:20,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:20,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:20,980 INFO L225 Difference]: With dead ends: 4082 [2021-06-05 15:06:20,980 INFO L226 Difference]: Without dead ends: 4061 [2021-06-05 15:06:20,980 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 725.2ms TimeCoverageRelationStatistics Valid=212, Invalid=844, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:06:20,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4061 states. [2021-06-05 15:06:21,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4061 to 3648. [2021-06-05 15:06:21,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3648 states, 3647 states have (on average 4.191115985741705) internal successors, (15285), 3647 states have internal predecessors, (15285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3648 states to 3648 states and 15285 transitions. [2021-06-05 15:06:21,028 INFO L78 Accepts]: Start accepts. Automaton has 3648 states and 15285 transitions. Word has length 23 [2021-06-05 15:06:21,029 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:21,029 INFO L482 AbstractCegarLoop]: Abstraction has 3648 states and 15285 transitions. [2021-06-05 15:06:21,029 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:21,029 INFO L276 IsEmpty]: Start isEmpty. Operand 3648 states and 15285 transitions. [2021-06-05 15:06:21,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:21,034 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:21,034 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:21,234 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable400 [2021-06-05 15:06:21,234 INFO L430 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:21,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:21,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1208919297, now seen corresponding path program 77 times [2021-06-05 15:06:21,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:21,234 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717460017] [2021-06-05 15:06:21,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:21,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:21,351 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:21,351 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:21,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717460017] [2021-06-05 15:06:21,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717460017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:21,351 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [602643914] [2021-06-05 15:06:21,351 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:21,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:21,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:21,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:21,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:21,475 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:21,475 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:21,476 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:21,484 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:21,485 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:21,485 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:21,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:21,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [602643914] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:21,547 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:21,547 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:21,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776430079] [2021-06-05 15:06:21,547 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:21,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:21,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:21,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:21,548 INFO L87 Difference]: Start difference. First operand 3648 states and 15285 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:22,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:22,205 INFO L93 Difference]: Finished difference Result 4272 states and 17685 transitions. [2021-06-05 15:06:22,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:06:22,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:22,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:22,213 INFO L225 Difference]: With dead ends: 4272 [2021-06-05 15:06:22,213 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 15:06:22,213 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 592.4ms TimeCoverageRelationStatistics Valid=186, Invalid=744, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:22,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 15:06:22,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3641. [2021-06-05 15:06:22,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3641 states, 3640 states have (on average 4.187637362637362) internal successors, (15243), 3640 states have internal predecessors, (15243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:22,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3641 states to 3641 states and 15243 transitions. [2021-06-05 15:06:22,265 INFO L78 Accepts]: Start accepts. Automaton has 3641 states and 15243 transitions. Word has length 23 [2021-06-05 15:06:22,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:22,265 INFO L482 AbstractCegarLoop]: Abstraction has 3641 states and 15243 transitions. [2021-06-05 15:06:22,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:22,265 INFO L276 IsEmpty]: Start isEmpty. Operand 3641 states and 15243 transitions. [2021-06-05 15:06:22,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:22,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:22,270 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:22,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable402 [2021-06-05 15:06:22,470 INFO L430 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:22,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:22,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1290318353, now seen corresponding path program 78 times [2021-06-05 15:06:22,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:22,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1201411610] [2021-06-05 15:06:22,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:22,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:22,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:22,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1201411610] [2021-06-05 15:06:22,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1201411610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:22,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1339739754] [2021-06-05 15:06:22,610 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:22,636 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:22,636 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:22,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:22,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:22,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:22,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:22,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:22,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:22,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:22,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:22,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:22,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1339739754] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:22,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:22,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:22,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635900007] [2021-06-05 15:06:22,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:22,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:22,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:22,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:22,807 INFO L87 Difference]: Start difference. First operand 3641 states and 15243 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,640 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:23,640 INFO L93 Difference]: Finished difference Result 4077 states and 16923 transitions. [2021-06-05 15:06:23,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:06:23,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:23,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:23,648 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 15:06:23,648 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 15:06:23,648 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 763.5ms TimeCoverageRelationStatistics Valid=236, Invalid=886, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:06:23,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 15:06:23,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3645. [2021-06-05 15:06:23,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.187431394072448) internal successors, (15259), 3644 states have internal predecessors, (15259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15259 transitions. [2021-06-05 15:06:23,696 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15259 transitions. Word has length 23 [2021-06-05 15:06:23,696 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:23,696 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15259 transitions. [2021-06-05 15:06:23,696 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:23,697 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15259 transitions. [2021-06-05 15:06:23,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:23,701 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:23,702 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:23,902 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable404 [2021-06-05 15:06:23,902 INFO L430 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:23,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:23,902 INFO L82 PathProgramCache]: Analyzing trace with hash -1391082209, now seen corresponding path program 79 times [2021-06-05 15:06:23,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:23,902 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169216005] [2021-06-05 15:06:23,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:23,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:24,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:24,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169216005] [2021-06-05 15:06:24,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169216005] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:24,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301037523] [2021-06-05 15:06:24,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:24,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:24,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:24,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:24,121 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:24,121 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:24,122 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:24,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:24,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:24,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:24,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:24,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301037523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:24,207 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:24,207 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:24,207 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802598035] [2021-06-05 15:06:24,207 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:24,207 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:24,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:24,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:24,208 INFO L87 Difference]: Start difference. First operand 3645 states and 15259 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:25,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:25,002 INFO L93 Difference]: Finished difference Result 4052 states and 16830 transitions. [2021-06-05 15:06:25,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:25,003 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:25,003 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:25,010 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 15:06:25,010 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 15:06:25,011 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 666.4ms TimeCoverageRelationStatistics Valid=195, Invalid=735, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:25,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 15:06:25,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3625. [2021-06-05 15:06:25,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.186258278145695) internal successors, (15171), 3624 states have internal predecessors, (15171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:25,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15171 transitions. [2021-06-05 15:06:25,059 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15171 transitions. Word has length 23 [2021-06-05 15:06:25,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:25,059 INFO L482 AbstractCegarLoop]: Abstraction has 3625 states and 15171 transitions. [2021-06-05 15:06:25,059 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:25,059 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15171 transitions. [2021-06-05 15:06:25,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:25,064 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:25,064 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:25,264 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable406,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:25,264 INFO L430 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:25,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:25,264 INFO L82 PathProgramCache]: Analyzing trace with hash 925880935, now seen corresponding path program 80 times [2021-06-05 15:06:25,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:25,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244442228] [2021-06-05 15:06:25,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:25,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:25,377 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:25,377 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:25,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244442228] [2021-06-05 15:06:25,377 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244442228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:25,377 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907183687] [2021-06-05 15:06:25,377 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:25,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:25,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:25,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:25,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:25,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:25,496 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:25,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:25,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:25,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:25,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:25,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:25,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [907183687] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:25,566 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:25,566 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:25,566 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135142600] [2021-06-05 15:06:25,566 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:25,566 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:25,566 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:25,566 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:25,566 INFO L87 Difference]: Start difference. First operand 3625 states and 15171 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:26,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:26,093 INFO L93 Difference]: Finished difference Result 4150 states and 17232 transitions. [2021-06-05 15:06:26,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:06:26,093 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:26,093 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:26,100 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 15:06:26,100 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 15:06:26,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 464.0ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:06:26,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 15:06:26,139 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3633. [2021-06-05 15:06:26,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3633 states, 3632 states have (on average 4.186398678414097) internal successors, (15205), 3632 states have internal predecessors, (15205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:26,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3633 states to 3633 states and 15205 transitions. [2021-06-05 15:06:26,150 INFO L78 Accepts]: Start accepts. Automaton has 3633 states and 15205 transitions. Word has length 23 [2021-06-05 15:06:26,150 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:26,150 INFO L482 AbstractCegarLoop]: Abstraction has 3633 states and 15205 transitions. [2021-06-05 15:06:26,150 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:26,150 INFO L276 IsEmpty]: Start isEmpty. Operand 3633 states and 15205 transitions. [2021-06-05 15:06:26,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:26,155 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:26,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:26,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable408 [2021-06-05 15:06:26,355 INFO L430 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:26,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:26,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1511214887, now seen corresponding path program 81 times [2021-06-05 15:06:26,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:26,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643519919] [2021-06-05 15:06:26,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:26,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:26,473 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:26,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643519919] [2021-06-05 15:06:26,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643519919] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:26,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2028526326] [2021-06-05 15:06:26,473 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:26,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:26,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:26,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:26,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:26,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:26,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:26,578 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:26,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:26,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:26,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:26,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:26,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2028526326] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:26,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:26,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:26,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255137801] [2021-06-05 15:06:26,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:26,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:26,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:26,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:26,668 INFO L87 Difference]: Start difference. First operand 3633 states and 15205 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:27,400 INFO L93 Difference]: Finished difference Result 4049 states and 16819 transitions. [2021-06-05 15:06:27,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:27,400 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:27,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:27,407 INFO L225 Difference]: With dead ends: 4049 [2021-06-05 15:06:27,407 INFO L226 Difference]: Without dead ends: 4023 [2021-06-05 15:06:27,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 681.4ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:27,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4023 states. [2021-06-05 15:06:27,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4023 to 3637. [2021-06-05 15:06:27,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3637 states, 3636 states have (on average 4.186193619361936) internal successors, (15221), 3636 states have internal predecessors, (15221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,456 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3637 states to 3637 states and 15221 transitions. [2021-06-05 15:06:27,456 INFO L78 Accepts]: Start accepts. Automaton has 3637 states and 15221 transitions. Word has length 23 [2021-06-05 15:06:27,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:27,456 INFO L482 AbstractCegarLoop]: Abstraction has 3637 states and 15221 transitions. [2021-06-05 15:06:27,456 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:27,456 INFO L276 IsEmpty]: Start isEmpty. Operand 3637 states and 15221 transitions. [2021-06-05 15:06:27,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:27,461 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:27,461 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:27,661 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 201 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable410 [2021-06-05 15:06:27,661 INFO L430 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:27,662 INFO L82 PathProgramCache]: Analyzing trace with hash -1170185675, now seen corresponding path program 82 times [2021-06-05 15:06:27,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:27,662 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [388228101] [2021-06-05 15:06:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:27,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:27,779 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:27,779 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [388228101] [2021-06-05 15:06:27,779 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [388228101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,779 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928517124] [2021-06-05 15:06:27,779 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:27,803 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:27,803 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:27,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:27,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:27,882 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:27,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:27,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:27,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:27,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:27,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928517124] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:27,971 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:27,971 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:27,971 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119568744] [2021-06-05 15:06:27,971 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:27,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:27,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:27,972 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:27,972 INFO L87 Difference]: Start difference. First operand 3637 states and 15221 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:28,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:28,707 INFO L93 Difference]: Finished difference Result 4005 states and 16651 transitions. [2021-06-05 15:06:28,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:28,707 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:28,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:28,714 INFO L225 Difference]: With dead ends: 4005 [2021-06-05 15:06:28,714 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 15:06:28,714 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=169, Invalid=761, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:28,717 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 15:06:28,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3629. [2021-06-05 15:06:28,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.186052921719956) internal successors, (15187), 3628 states have internal predecessors, (15187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:28,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15187 transitions. [2021-06-05 15:06:28,760 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15187 transitions. Word has length 23 [2021-06-05 15:06:28,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:28,760 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15187 transitions. [2021-06-05 15:06:28,760 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:28,760 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15187 transitions. [2021-06-05 15:06:28,765 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:28,765 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:28,765 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:28,965 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable412 [2021-06-05 15:06:28,966 INFO L430 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:28,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:28,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1080318453, now seen corresponding path program 83 times [2021-06-05 15:06:28,966 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:28,966 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074412481] [2021-06-05 15:06:28,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:28,968 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:29,077 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:29,078 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:29,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074412481] [2021-06-05 15:06:29,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2074412481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:29,078 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751111246] [2021-06-05 15:06:29,078 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:29,103 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:29,103 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:29,103 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:29,104 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:29,200 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:29,200 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:29,201 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:29,209 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:29,209 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:29,209 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:29,268 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:29,268 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751111246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:29,268 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:29,268 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:29,269 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265675743] [2021-06-05 15:06:29,269 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:29,269 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:29,269 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:29,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:29,269 INFO L87 Difference]: Start difference. First operand 3629 states and 15187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:29,703 INFO L93 Difference]: Finished difference Result 3993 states and 16603 transitions. [2021-06-05 15:06:29,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:29,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:29,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:29,710 INFO L225 Difference]: With dead ends: 3993 [2021-06-05 15:06:29,710 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 15:06:29,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 391.8ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:29,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 15:06:29,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3621. [2021-06-05 15:06:29,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 4.185911602209945) internal successors, (15153), 3620 states have internal predecessors, (15153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 15153 transitions. [2021-06-05 15:06:29,759 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 15153 transitions. Word has length 23 [2021-06-05 15:06:29,759 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:29,759 INFO L482 AbstractCegarLoop]: Abstraction has 3621 states and 15153 transitions. [2021-06-05 15:06:29,759 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:29,759 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 15153 transitions. [2021-06-05 15:06:29,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:29,764 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:29,764 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:29,964 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable414,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:29,964 INFO L430 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:29,964 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:29,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1750800029, now seen corresponding path program 84 times [2021-06-05 15:06:29,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:29,965 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342522942] [2021-06-05 15:06:29,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:29,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:30,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:30,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:30,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342522942] [2021-06-05 15:06:30,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342522942] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:30,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258545198] [2021-06-05 15:06:30,073 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:30,097 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:06:30,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:30,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:06:30,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:30,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:30,217 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 50 [2021-06-05 15:06:30,218 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:30,227 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:30,229 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:06:30,229 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:43, output treesize:10 [2021-06-05 15:06:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:30,254 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258545198] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:30,254 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:30,254 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:06:30,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872320881] [2021-06-05 15:06:30,254 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:06:30,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:30,254 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:06:30,254 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=260, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:06:30,254 INFO L87 Difference]: Start difference. First operand 3621 states and 15153 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:30,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:30,760 INFO L93 Difference]: Finished difference Result 3897 states and 16215 transitions. [2021-06-05 15:06:30,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:06:30,760 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:30,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:30,767 INFO L225 Difference]: With dead ends: 3897 [2021-06-05 15:06:30,767 INFO L226 Difference]: Without dead ends: 3875 [2021-06-05 15:06:30,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=114, Invalid=698, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:30,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3875 states. [2021-06-05 15:06:30,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3875 to 3625. [2021-06-05 15:06:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3625 states, 3624 states have (on average 4.186258278145695) internal successors, (15171), 3624 states have internal predecessors, (15171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:30,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3625 states to 3625 states and 15171 transitions. [2021-06-05 15:06:30,814 INFO L78 Accepts]: Start accepts. Automaton has 3625 states and 15171 transitions. Word has length 23 [2021-06-05 15:06:30,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:30,814 INFO L482 AbstractCegarLoop]: Abstraction has 3625 states and 15171 transitions. [2021-06-05 15:06:30,814 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:30,814 INFO L276 IsEmpty]: Start isEmpty. Operand 3625 states and 15171 transitions. [2021-06-05 15:06:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:30,819 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:30,819 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:31,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable416,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:31,020 INFO L430 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:31,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:31,020 INFO L82 PathProgramCache]: Analyzing trace with hash -1237273177, now seen corresponding path program 85 times [2021-06-05 15:06:31,020 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:31,020 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642743619] [2021-06-05 15:06:31,020 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:31,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:31,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:31,126 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:31,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642743619] [2021-06-05 15:06:31,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1642743619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:31,126 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453527199] [2021-06-05 15:06:31,126 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:31,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:31,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:31,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:31,231 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:31,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:31,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:31,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:31,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:31,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:31,341 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453527199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:31,341 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:31,341 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:31,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163072595] [2021-06-05 15:06:31,341 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:31,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:31,341 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:31,341 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:31,341 INFO L87 Difference]: Start difference. First operand 3625 states and 15171 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:31,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:31,962 INFO L93 Difference]: Finished difference Result 3860 states and 16055 transitions. [2021-06-05 15:06:31,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:31,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:31,969 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 15:06:31,969 INFO L226 Difference]: Without dead ends: 3835 [2021-06-05 15:06:31,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 520.3ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:31,973 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3835 states. [2021-06-05 15:06:32,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3835 to 3629. [2021-06-05 15:06:32,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3629 states, 3628 states have (on average 4.186052921719956) internal successors, (15187), 3628 states have internal predecessors, (15187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:32,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3629 states to 3629 states and 15187 transitions. [2021-06-05 15:06:32,014 INFO L78 Accepts]: Start accepts. Automaton has 3629 states and 15187 transitions. Word has length 23 [2021-06-05 15:06:32,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:32,015 INFO L482 AbstractCegarLoop]: Abstraction has 3629 states and 15187 transitions. [2021-06-05 15:06:32,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:32,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3629 states and 15187 transitions. [2021-06-05 15:06:32,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:32,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:32,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:32,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable419,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:32,220 INFO L430 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:32,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:32,220 INFO L82 PathProgramCache]: Analyzing trace with hash -161562021, now seen corresponding path program 86 times [2021-06-05 15:06:32,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:32,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341544237] [2021-06-05 15:06:32,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:32,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:32,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:32,329 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:32,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341544237] [2021-06-05 15:06:32,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341544237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:32,329 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752293345] [2021-06-05 15:06:32,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:32,354 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:32,354 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:32,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:32,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:32,433 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:32,433 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:32,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:32,442 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:32,443 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:32,443 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:32,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:32,520 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1752293345] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:32,520 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:32,520 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:32,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1777929007] [2021-06-05 15:06:32,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:32,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:32,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:32,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:32,521 INFO L87 Difference]: Start difference. First operand 3629 states and 15187 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:33,045 INFO L93 Difference]: Finished difference Result 3848 states and 16015 transitions. [2021-06-05 15:06:33,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:06:33,046 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:33,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:33,053 INFO L225 Difference]: With dead ends: 3848 [2021-06-05 15:06:33,053 INFO L226 Difference]: Without dead ends: 3827 [2021-06-05 15:06:33,053 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 444.4ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:06:33,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3827 states. [2021-06-05 15:06:33,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3827 to 3621. [2021-06-05 15:06:33,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3621 states, 3620 states have (on average 4.185911602209945) internal successors, (15153), 3620 states have internal predecessors, (15153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3621 states to 3621 states and 15153 transitions. [2021-06-05 15:06:33,098 INFO L78 Accepts]: Start accepts. Automaton has 3621 states and 15153 transitions. Word has length 23 [2021-06-05 15:06:33,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:33,098 INFO L482 AbstractCegarLoop]: Abstraction has 3621 states and 15153 transitions. [2021-06-05 15:06:33,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:33,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3621 states and 15153 transitions. [2021-06-05 15:06:33,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:33,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:33,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:33,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable421 [2021-06-05 15:06:33,303 INFO L430 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:33,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:33,304 INFO L82 PathProgramCache]: Analyzing trace with hash 119433831, now seen corresponding path program 87 times [2021-06-05 15:06:33,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:33,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1341005993] [2021-06-05 15:06:33,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:33,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:33,418 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:33,418 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:33,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1341005993] [2021-06-05 15:06:33,418 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1341005993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,418 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1122567686] [2021-06-05 15:06:33,419 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:33,443 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:06:33,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:33,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:33,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:33,513 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:33,513 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:33,514 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:33,522 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:33,523 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:33,523 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:33,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1122567686] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:33,625 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:33,625 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:33,625 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068410164] [2021-06-05 15:06:33,625 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:33,625 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:33,626 INFO L87 Difference]: Start difference. First operand 3621 states and 15153 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:34,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:34,138 INFO L93 Difference]: Finished difference Result 3860 states and 16065 transitions. [2021-06-05 15:06:34,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:34,138 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:34,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:34,145 INFO L225 Difference]: With dead ends: 3860 [2021-06-05 15:06:34,145 INFO L226 Difference]: Without dead ends: 3834 [2021-06-05 15:06:34,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 492.1ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:06:34,148 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3834 states. [2021-06-05 15:06:34,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3834 to 3630. [2021-06-05 15:06:34,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3630 states, 3629 states have (on average 4.184348305318269) internal successors, (15185), 3629 states have internal predecessors, (15185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:34,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3630 states to 3630 states and 15185 transitions. [2021-06-05 15:06:34,192 INFO L78 Accepts]: Start accepts. Automaton has 3630 states and 15185 transitions. Word has length 23 [2021-06-05 15:06:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:34,192 INFO L482 AbstractCegarLoop]: Abstraction has 3630 states and 15185 transitions. [2021-06-05 15:06:34,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3630 states and 15185 transitions. [2021-06-05 15:06:34,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:34,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:34,197 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:34,397 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable423 [2021-06-05 15:06:34,398 INFO L430 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:34,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:34,398 INFO L82 PathProgramCache]: Analyzing trace with hash -922142237, now seen corresponding path program 88 times [2021-06-05 15:06:34,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:34,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352513518] [2021-06-05 15:06:34,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:34,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:34,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:34,511 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:34,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352513518] [2021-06-05 15:06:34,511 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352513518] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:34,511 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1978962840] [2021-06-05 15:06:34,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:34,535 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:34,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:34,536 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:34,536 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:34,609 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:34,609 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:34,610 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:34,619 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:34,619 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:34,619 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:34,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1978962840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:34,719 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:34,719 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:34,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284949725] [2021-06-05 15:06:34,719 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:34,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:34,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:34,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:34,719 INFO L87 Difference]: Start difference. First operand 3630 states and 15185 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:35,308 INFO L93 Difference]: Finished difference Result 3920 states and 16297 transitions. [2021-06-05 15:06:35,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:06:35,309 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:35,309 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:35,315 INFO L225 Difference]: With dead ends: 3920 [2021-06-05 15:06:35,315 INFO L226 Difference]: Without dead ends: 3892 [2021-06-05 15:06:35,315 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 508.2ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:06:35,319 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3892 states. [2021-06-05 15:06:35,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3892 to 3623. [2021-06-05 15:06:35,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.185808945334069) internal successors, (15161), 3622 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15161 transitions. [2021-06-05 15:06:35,362 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15161 transitions. Word has length 23 [2021-06-05 15:06:35,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:35,362 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15161 transitions. [2021-06-05 15:06:35,362 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:35,362 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15161 transitions. [2021-06-05 15:06:35,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:35,367 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:35,367 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:35,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable425,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:35,568 INFO L430 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:35,568 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:35,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1209263589, now seen corresponding path program 89 times [2021-06-05 15:06:35,568 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:35,568 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269278260] [2021-06-05 15:06:35,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:35,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:35,689 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:35,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269278260] [2021-06-05 15:06:35,689 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1269278260] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:35,689 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [365462151] [2021-06-05 15:06:35,689 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:35,713 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:35,713 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:35,714 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:35,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:35,783 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:35,783 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:35,784 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:35,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:35,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:35,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:35,893 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:35,893 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [365462151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:35,893 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:35,893 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:35,893 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1134870751] [2021-06-05 15:06:35,893 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:35,893 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:35,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:35,894 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:35,894 INFO L87 Difference]: Start difference. First operand 3623 states and 15161 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:36,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:36,406 INFO L93 Difference]: Finished difference Result 3766 states and 15685 transitions. [2021-06-05 15:06:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:06:36,406 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:36,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:36,413 INFO L225 Difference]: With dead ends: 3766 [2021-06-05 15:06:36,413 INFO L226 Difference]: Without dead ends: 3740 [2021-06-05 15:06:36,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 517.7ms TimeCoverageRelationStatistics Valid=141, Invalid=615, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:06:36,416 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3740 states. [2021-06-05 15:06:36,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3740 to 3627. [2021-06-05 15:06:36,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185603971318257) internal successors, (15177), 3626 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:36,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15177 transitions. [2021-06-05 15:06:36,474 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15177 transitions. Word has length 23 [2021-06-05 15:06:36,475 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:36,475 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15177 transitions. [2021-06-05 15:06:36,475 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:36,475 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15177 transitions. [2021-06-05 15:06:36,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:36,479 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:36,479 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:36,680 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable427 [2021-06-05 15:06:36,680 INFO L430 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:36,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:36,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1702480975, now seen corresponding path program 90 times [2021-06-05 15:06:36,680 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:36,680 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773931484] [2021-06-05 15:06:36,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:36,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:36,819 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:36,819 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773931484] [2021-06-05 15:06:36,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773931484] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:36,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1617531805] [2021-06-05 15:06:36,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:36,845 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:36,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:36,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:36,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:36,917 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:36,917 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:36,918 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,927 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:36,927 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:36,928 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:37,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:37,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1617531805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:37,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:37,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195133848] [2021-06-05 15:06:37,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:37,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:37,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:37,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:37,029 INFO L87 Difference]: Start difference. First operand 3627 states and 15177 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:37,582 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:37,582 INFO L93 Difference]: Finished difference Result 3816 states and 15891 transitions. [2021-06-05 15:06:37,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:37,582 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:37,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:37,590 INFO L225 Difference]: With dead ends: 3816 [2021-06-05 15:06:37,590 INFO L226 Difference]: Without dead ends: 3795 [2021-06-05 15:06:37,590 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 533.5ms TimeCoverageRelationStatistics Valid=121, Invalid=529, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:37,594 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3795 states. [2021-06-05 15:06:37,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3795 to 3623. [2021-06-05 15:06:37,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.185808945334069) internal successors, (15161), 3622 states have internal predecessors, (15161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15161 transitions. [2021-06-05 15:06:37,636 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15161 transitions. Word has length 23 [2021-06-05 15:06:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:37,636 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15161 transitions. [2021-06-05 15:06:37,636 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15161 transitions. [2021-06-05 15:06:37,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:37,641 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:37,641 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:37,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable429 [2021-06-05 15:06:37,841 INFO L430 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:37,842 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:37,842 INFO L82 PathProgramCache]: Analyzing trace with hash -767704719, now seen corresponding path program 91 times [2021-06-05 15:06:37,842 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:37,842 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956372467] [2021-06-05 15:06:37,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:37,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:37,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956372467] [2021-06-05 15:06:37,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956372467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:37,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1595249929] [2021-06-05 15:06:37,961 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:37,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:37,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:37,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:38,055 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:38,055 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:38,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,064 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:38,065 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:38,065 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:38,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1595249929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:38,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:38,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:38,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953935005] [2021-06-05 15:06:38,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:38,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:38,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:38,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:38,163 INFO L87 Difference]: Start difference. First operand 3623 states and 15161 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:38,660 INFO L93 Difference]: Finished difference Result 3832 states and 15943 transitions. [2021-06-05 15:06:38,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:06:38,661 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:38,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:38,667 INFO L225 Difference]: With dead ends: 3832 [2021-06-05 15:06:38,667 INFO L226 Difference]: Without dead ends: 3807 [2021-06-05 15:06:38,668 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 474.5ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:38,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3807 states. [2021-06-05 15:06:38,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3807 to 3627. [2021-06-05 15:06:38,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185603971318257) internal successors, (15177), 3626 states have internal predecessors, (15177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15177 transitions. [2021-06-05 15:06:38,714 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15177 transitions. Word has length 23 [2021-06-05 15:06:38,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:38,714 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15177 transitions. [2021-06-05 15:06:38,714 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:38,714 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15177 transitions. [2021-06-05 15:06:38,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:38,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:38,719 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:38,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable431,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:38,919 INFO L430 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:38,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:38,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1780397251, now seen corresponding path program 92 times [2021-06-05 15:06:38,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:38,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1162193426] [2021-06-05 15:06:38,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:38,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:39,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:39,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:39,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1162193426] [2021-06-05 15:06:39,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1162193426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:39,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609573644] [2021-06-05 15:06:39,035 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:39,060 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:39,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:39,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:39,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:39,151 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:39,151 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:39,153 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:39,161 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:39,162 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:39,162 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:06:39,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:39,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609573644] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:39,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:39,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:39,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76294653] [2021-06-05 15:06:39,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:39,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:39,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:39,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:39,262 INFO L87 Difference]: Start difference. First operand 3627 states and 15177 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:39,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:39,672 INFO L93 Difference]: Finished difference Result 3820 states and 15903 transitions. [2021-06-05 15:06:39,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:06:39,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:39,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:39,679 INFO L225 Difference]: With dead ends: 3820 [2021-06-05 15:06:39,679 INFO L226 Difference]: Without dead ends: 3799 [2021-06-05 15:06:39,680 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 445.0ms TimeCoverageRelationStatistics Valid=113, Invalid=487, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:06:39,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3799 states. [2021-06-05 15:06:39,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3799 to 3619. [2021-06-05 15:06:39,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 4.185737976782753) internal successors, (15144), 3618 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:39,727 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 15144 transitions. [2021-06-05 15:06:39,727 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 15144 transitions. Word has length 23 [2021-06-05 15:06:39,727 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:39,727 INFO L482 AbstractCegarLoop]: Abstraction has 3619 states and 15144 transitions. [2021-06-05 15:06:39,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:39,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 15144 transitions. [2021-06-05 15:06:39,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:39,732 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:39,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:39,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable433 [2021-06-05 15:06:39,932 INFO L430 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:39,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:39,933 INFO L82 PathProgramCache]: Analyzing trace with hash -37050447, now seen corresponding path program 93 times [2021-06-05 15:06:39,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:39,933 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319948950] [2021-06-05 15:06:39,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:39,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:40,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319948950] [2021-06-05 15:06:40,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319948950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1574826004] [2021-06-05 15:06:40,041 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:06:40,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:40,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:40,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:40,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:06:40,169 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:06:40,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:40,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 34 [2021-06-05 15:06:40,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:40,182 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:40,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:40,183 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:31 [2021-06-05 15:06:40,229 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,229 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1574826004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,229 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:40,229 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:40,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [72296926] [2021-06-05 15:06:40,230 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:40,230 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:40,230 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:40,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:40,230 INFO L87 Difference]: Start difference. First operand 3619 states and 15144 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:40,603 INFO L93 Difference]: Finished difference Result 3845 states and 16010 transitions. [2021-06-05 15:06:40,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:40,603 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:40,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:40,609 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 15:06:40,610 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 15:06:40,610 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 294.5ms TimeCoverageRelationStatistics Valid=85, Invalid=467, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:06:40,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 15:06:40,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3615. [2021-06-05 15:06:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 4.185943552850028) internal successors, (15128), 3614 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 15128 transitions. [2021-06-05 15:06:40,655 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 15128 transitions. Word has length 23 [2021-06-05 15:06:40,655 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:40,655 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 15128 transitions. [2021-06-05 15:06:40,655 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:40,655 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 15128 transitions. [2021-06-05 15:06:40,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:40,660 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:40,660 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:40,860 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable435,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,860 INFO L430 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:40,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:40,860 INFO L82 PathProgramCache]: Analyzing trace with hash 634766705, now seen corresponding path program 94 times [2021-06-05 15:06:40,860 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:40,860 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326865300] [2021-06-05 15:06:40,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:40,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:40,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:40,965 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:40,965 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326865300] [2021-06-05 15:06:40,966 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326865300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:40,966 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [279248416] [2021-06-05 15:06:40,966 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:40,989 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:40,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:40,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:40,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:41,082 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:41,082 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:41,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:41,091 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:41,092 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:41,092 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:41,150 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:41,151 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [279248416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:41,151 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:41,151 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:41,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [136764858] [2021-06-05 15:06:41,151 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:41,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:41,151 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:41,151 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:41,151 INFO L87 Difference]: Start difference. First operand 3615 states and 15128 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:41,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:41,686 INFO L93 Difference]: Finished difference Result 3905 states and 16247 transitions. [2021-06-05 15:06:41,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:06:41,686 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:41,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:41,693 INFO L225 Difference]: With dead ends: 3905 [2021-06-05 15:06:41,693 INFO L226 Difference]: Without dead ends: 3883 [2021-06-05 15:06:41,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 452.5ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:41,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3883 states. [2021-06-05 15:06:41,727 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3883 to 3623. [2021-06-05 15:06:41,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3623 states, 3622 states have (on average 4.1860850358917725) internal successors, (15162), 3622 states have internal predecessors, (15162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:41,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3623 states to 3623 states and 15162 transitions. [2021-06-05 15:06:41,738 INFO L78 Accepts]: Start accepts. Automaton has 3623 states and 15162 transitions. Word has length 23 [2021-06-05 15:06:41,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:41,738 INFO L482 AbstractCegarLoop]: Abstraction has 3623 states and 15162 transitions. [2021-06-05 15:06:41,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:41,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3623 states and 15162 transitions. [2021-06-05 15:06:41,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:41,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:41,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:41,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable436 [2021-06-05 15:06:41,943 INFO L430 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:41,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:41,943 INFO L82 PathProgramCache]: Analyzing trace with hash 1148293557, now seen corresponding path program 95 times [2021-06-05 15:06:41,943 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:41,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647387916] [2021-06-05 15:06:41,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:41,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:42,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:42,051 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:42,051 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647387916] [2021-06-05 15:06:42,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [647387916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:42,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370275939] [2021-06-05 15:06:42,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:42,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:06:42,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:42,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:42,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:42,158 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:42,158 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:42,159 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:42,167 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:42,167 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:42,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:42,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:42,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1370275939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:42,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:42,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:42,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202598587] [2021-06-05 15:06:42,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:42,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:42,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:42,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:42,246 INFO L87 Difference]: Start difference. First operand 3623 states and 15162 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:42,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:42,925 INFO L93 Difference]: Finished difference Result 3907 states and 16243 transitions. [2021-06-05 15:06:42,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:06:42,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:42,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:42,932 INFO L225 Difference]: With dead ends: 3907 [2021-06-05 15:06:42,932 INFO L226 Difference]: Without dead ends: 3882 [2021-06-05 15:06:42,932 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 499.0ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:42,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3882 states. [2021-06-05 15:06:42,968 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3882 to 3627. [2021-06-05 15:06:42,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3627 states, 3626 states have (on average 4.185879757308329) internal successors, (15178), 3626 states have internal predecessors, (15178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:42,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3627 states to 3627 states and 15178 transitions. [2021-06-05 15:06:42,978 INFO L78 Accepts]: Start accepts. Automaton has 3627 states and 15178 transitions. Word has length 23 [2021-06-05 15:06:42,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:42,978 INFO L482 AbstractCegarLoop]: Abstraction has 3627 states and 15178 transitions. [2021-06-05 15:06:42,978 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:42,978 INFO L276 IsEmpty]: Start isEmpty. Operand 3627 states and 15178 transitions. [2021-06-05 15:06:42,983 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:42,983 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:42,983 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:43,183 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable438,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:43,183 INFO L430 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:43,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:43,184 INFO L82 PathProgramCache]: Analyzing trace with hash -2070962583, now seen corresponding path program 96 times [2021-06-05 15:06:43,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:43,184 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026045487] [2021-06-05 15:06:43,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:43,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:43,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:43,290 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:43,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026045487] [2021-06-05 15:06:43,290 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1026045487] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:43,290 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1750436907] [2021-06-05 15:06:43,290 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:43,314 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:06:43,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:43,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:43,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:43,426 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:06:43,426 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 40 treesize of output 64 [2021-06-05 15:06:43,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:43,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:43,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:43,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:40 [2021-06-05 15:06:43,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:43,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1750436907] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:43,513 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:43,513 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:06:43,514 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906925167] [2021-06-05 15:06:43,514 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:43,514 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:43,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:43,514 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:43,514 INFO L87 Difference]: Start difference. First operand 3627 states and 15178 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:44,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:44,087 INFO L93 Difference]: Finished difference Result 3938 states and 16373 transitions. [2021-06-05 15:06:44,087 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:06:44,087 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:44,088 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:44,094 INFO L225 Difference]: With dead ends: 3938 [2021-06-05 15:06:44,094 INFO L226 Difference]: Without dead ends: 3917 [2021-06-05 15:06:44,094 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 484.6ms TimeCoverageRelationStatistics Valid=162, Invalid=894, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:06:44,098 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3917 states. [2021-06-05 15:06:44,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3917 to 3619. [2021-06-05 15:06:44,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3619 states, 3618 states have (on average 4.185737976782753) internal successors, (15144), 3618 states have internal predecessors, (15144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:44,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3619 states to 3619 states and 15144 transitions. [2021-06-05 15:06:44,140 INFO L78 Accepts]: Start accepts. Automaton has 3619 states and 15144 transitions. Word has length 23 [2021-06-05 15:06:44,140 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:44,140 INFO L482 AbstractCegarLoop]: Abstraction has 3619 states and 15144 transitions. [2021-06-05 15:06:44,140 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:44,140 INFO L276 IsEmpty]: Start isEmpty. Operand 3619 states and 15144 transitions. [2021-06-05 15:06:44,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:44,145 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:44,145 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:44,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable440,216 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:44,346 INFO L430 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:44,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:44,346 INFO L82 PathProgramCache]: Analyzing trace with hash -1900147651, now seen corresponding path program 97 times [2021-06-05 15:06:44,346 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:44,346 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138761367] [2021-06-05 15:06:44,346 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:44,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:44,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:44,476 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:44,476 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138761367] [2021-06-05 15:06:44,477 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2138761367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:44,477 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668762928] [2021-06-05 15:06:44,477 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:44,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:44,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:44,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:44,598 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:44,599 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:44,600 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:44,607 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:44,608 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:44,608 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:44,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:44,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1668762928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:44,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:44,668 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:44,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267334867] [2021-06-05 15:06:44,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:44,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:44,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:44,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:44,668 INFO L87 Difference]: Start difference. First operand 3619 states and 15144 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:45,063 INFO L93 Difference]: Finished difference Result 3845 states and 16010 transitions. [2021-06-05 15:06:45,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:06:45,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:45,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:45,070 INFO L225 Difference]: With dead ends: 3845 [2021-06-05 15:06:45,070 INFO L226 Difference]: Without dead ends: 3822 [2021-06-05 15:06:45,070 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 388.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:45,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3822 states. [2021-06-05 15:06:45,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3822 to 3615. [2021-06-05 15:06:45,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3615 states, 3614 states have (on average 4.185943552850028) internal successors, (15128), 3614 states have internal predecessors, (15128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3615 states to 3615 states and 15128 transitions. [2021-06-05 15:06:45,117 INFO L78 Accepts]: Start accepts. Automaton has 3615 states and 15128 transitions. Word has length 23 [2021-06-05 15:06:45,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:45,117 INFO L482 AbstractCegarLoop]: Abstraction has 3615 states and 15128 transitions. [2021-06-05 15:06:45,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:45,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3615 states and 15128 transitions. [2021-06-05 15:06:45,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:45,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:45,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:45,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable444 [2021-06-05 15:06:45,322 INFO L430 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:45,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:45,323 INFO L82 PathProgramCache]: Analyzing trace with hash 1294245051, now seen corresponding path program 35 times [2021-06-05 15:06:45,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:45,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174021342] [2021-06-05 15:06:45,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:45,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:45,404 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:45,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:45,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174021342] [2021-06-05 15:06:45,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174021342] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:45,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1618869717] [2021-06-05 15:06:45,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:45,432 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:06:45,432 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:45,433 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:45,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:45,535 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 15:06:45,535 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 15:06:45,537 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:45,544 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:45,545 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:45,545 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:29 [2021-06-05 15:06:45,604 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:45,604 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1618869717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:45,604 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:45,604 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:45,604 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896697020] [2021-06-05 15:06:45,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:45,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:45,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:45,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:45,605 INFO L87 Difference]: Start difference. First operand 3615 states and 15128 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:46,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:46,298 INFO L93 Difference]: Finished difference Result 4559 states and 18845 transitions. [2021-06-05 15:06:46,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:46,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:46,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:46,306 INFO L225 Difference]: With dead ends: 4559 [2021-06-05 15:06:46,306 INFO L226 Difference]: Without dead ends: 4535 [2021-06-05 15:06:46,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 503.2ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:46,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4535 states. [2021-06-05 15:06:46,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4535 to 3639. [2021-06-05 15:06:46,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 4.188565145684442) internal successors, (15238), 3638 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:46,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 15238 transitions. [2021-06-05 15:06:46,358 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 15238 transitions. Word has length 23 [2021-06-05 15:06:46,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:46,358 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 15238 transitions. [2021-06-05 15:06:46,358 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:46,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 15238 transitions. [2021-06-05 15:06:46,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:46,363 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:46,363 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:46,564 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable446,218 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:46,564 INFO L430 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:46,564 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:46,564 INFO L82 PathProgramCache]: Analyzing trace with hash 388084091, now seen corresponding path program 36 times [2021-06-05 15:06:46,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:46,564 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1648694833] [2021-06-05 15:06:46,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:46,566 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:46,650 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:46,650 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:46,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1648694833] [2021-06-05 15:06:46,650 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1648694833] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:46,650 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [141217237] [2021-06-05 15:06:46,650 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:46,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:06:46,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:46,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:46,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:46,748 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:46,748 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:46,749 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:46,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:46,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:46,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:46,835 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:46,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [141217237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:46,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:46,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:46,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107539681] [2021-06-05 15:06:46,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:46,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:46,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:46,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:46,836 INFO L87 Difference]: Start difference. First operand 3639 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:47,569 INFO L93 Difference]: Finished difference Result 4391 states and 18168 transitions. [2021-06-05 15:06:47,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:47,569 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:47,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:47,576 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 15:06:47,576 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 15:06:47,576 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 553.5ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:47,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 15:06:47,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3645. [2021-06-05 15:06:47,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3645 states, 3644 states have (on average 4.188254665203074) internal successors, (15262), 3644 states have internal predecessors, (15262), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3645 states to 3645 states and 15262 transitions. [2021-06-05 15:06:47,625 INFO L78 Accepts]: Start accepts. Automaton has 3645 states and 15262 transitions. Word has length 23 [2021-06-05 15:06:47,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:47,625 INFO L482 AbstractCegarLoop]: Abstraction has 3645 states and 15262 transitions. [2021-06-05 15:06:47,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:47,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3645 states and 15262 transitions. [2021-06-05 15:06:47,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:47,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:47,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:47,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable448 [2021-06-05 15:06:47,830 INFO L430 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:47,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:47,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1463795247, now seen corresponding path program 37 times [2021-06-05 15:06:47,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:47,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1881855027] [2021-06-05 15:06:47,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:47,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:47,916 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:47,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:47,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1881855027] [2021-06-05 15:06:47,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1881855027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:47,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118493726] [2021-06-05 15:06:47,916 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:47,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:47,940 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:47,940 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:48,015 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:48,015 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:48,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:48,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:48,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:48,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:48,111 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1118493726] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:48,111 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:48,111 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:48,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897976473] [2021-06-05 15:06:48,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:48,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:48,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:48,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:48,111 INFO L87 Difference]: Start difference. First operand 3645 states and 15262 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:48,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:48,830 INFO L93 Difference]: Finished difference Result 4372 states and 18083 transitions. [2021-06-05 15:06:48,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:48,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:48,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:48,838 INFO L225 Difference]: With dead ends: 4372 [2021-06-05 15:06:48,838 INFO L226 Difference]: Without dead ends: 4349 [2021-06-05 15:06:48,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 635.2ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:48,842 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4349 states. [2021-06-05 15:06:48,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4349 to 3639. [2021-06-05 15:06:48,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3639 states, 3638 states have (on average 4.188565145684442) internal successors, (15238), 3638 states have internal predecessors, (15238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:48,887 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3639 states to 3639 states and 15238 transitions. [2021-06-05 15:06:48,888 INFO L78 Accepts]: Start accepts. Automaton has 3639 states and 15238 transitions. Word has length 23 [2021-06-05 15:06:48,888 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:48,888 INFO L482 AbstractCegarLoop]: Abstraction has 3639 states and 15238 transitions. [2021-06-05 15:06:48,888 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:48,888 INFO L276 IsEmpty]: Start isEmpty. Operand 3639 states and 15238 transitions. [2021-06-05 15:06:48,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:48,893 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:48,893 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:49,093 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable450,220 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:49,093 INFO L430 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:49,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:49,093 INFO L82 PathProgramCache]: Analyzing trace with hash 1129036189, now seen corresponding path program 38 times [2021-06-05 15:06:49,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:49,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143787083] [2021-06-05 15:06:49,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:49,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:49,175 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:49,175 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143787083] [2021-06-05 15:06:49,175 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143787083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:49,175 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245251096] [2021-06-05 15:06:49,175 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:49,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:49,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:49,200 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:49,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:49,284 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:49,284 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:49,285 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:49,293 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:49,293 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:49,293 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:49,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:49,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245251096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:49,353 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:49,353 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:49,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530131140] [2021-06-05 15:06:49,353 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:49,353 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:49,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:49,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:49,354 INFO L87 Difference]: Start difference. First operand 3639 states and 15238 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:50,067 INFO L93 Difference]: Finished difference Result 4562 states and 18841 transitions. [2021-06-05 15:06:50,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:50,067 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:50,067 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:50,075 INFO L225 Difference]: With dead ends: 4562 [2021-06-05 15:06:50,076 INFO L226 Difference]: Without dead ends: 4531 [2021-06-05 15:06:50,076 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 217 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:50,080 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4531 states. [2021-06-05 15:06:50,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4531 to 3656. [2021-06-05 15:06:50,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191518467852257) internal successors, (15320), 3655 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15320 transitions. [2021-06-05 15:06:50,128 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15320 transitions. Word has length 23 [2021-06-05 15:06:50,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:50,128 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15320 transitions. [2021-06-05 15:06:50,128 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:50,128 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15320 transitions. [2021-06-05 15:06:50,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:50,133 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:50,133 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:50,333 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable452,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:50,334 INFO L430 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:50,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:50,334 INFO L82 PathProgramCache]: Analyzing trace with hash 1716781511, now seen corresponding path program 39 times [2021-06-05 15:06:50,334 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:50,334 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056480878] [2021-06-05 15:06:50,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:50,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:50,420 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:50,420 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056480878] [2021-06-05 15:06:50,420 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056480878] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:50,420 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [770405576] [2021-06-05 15:06:50,420 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:50,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:06:50,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:50,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:50,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:50,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:50,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:50,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:50,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:50,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:50,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:50,608 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:50,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [770405576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:50,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:50,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:50,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [599025520] [2021-06-05 15:06:50,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:50,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:50,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:50,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:50,609 INFO L87 Difference]: Start difference. First operand 3656 states and 15320 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:51,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:51,241 INFO L93 Difference]: Finished difference Result 4334 states and 17962 transitions. [2021-06-05 15:06:51,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:06:51,241 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:51,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:51,249 INFO L225 Difference]: With dead ends: 4334 [2021-06-05 15:06:51,249 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 15:06:51,249 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 537.1ms TimeCoverageRelationStatistics Valid=185, Invalid=807, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:06:51,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 15:06:51,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3662. [2021-06-05 15:06:51,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3662 states, 3661 states have (on average 4.191204588910134) internal successors, (15344), 3661 states have internal predecessors, (15344), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:51,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3662 states to 3662 states and 15344 transitions. [2021-06-05 15:06:51,299 INFO L78 Accepts]: Start accepts. Automaton has 3662 states and 15344 transitions. Word has length 23 [2021-06-05 15:06:51,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:51,299 INFO L482 AbstractCegarLoop]: Abstraction has 3662 states and 15344 transitions. [2021-06-05 15:06:51,299 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:51,299 INFO L276 IsEmpty]: Start isEmpty. Operand 3662 states and 15344 transitions. [2021-06-05 15:06:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:51,304 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:51,304 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:51,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable454 [2021-06-05 15:06:51,505 INFO L430 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:51,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:51,505 INFO L82 PathProgramCache]: Analyzing trace with hash -1502474629, now seen corresponding path program 40 times [2021-06-05 15:06:51,505 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:51,505 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655927361] [2021-06-05 15:06:51,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:51,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:51,601 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:51,601 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:51,601 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655927361] [2021-06-05 15:06:51,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1655927361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:51,602 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449751137] [2021-06-05 15:06:51,602 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:51,626 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:51,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:51,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:51,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:51,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:51,698 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:51,699 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:51,707 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:51,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:51,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:51,785 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:51,785 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [449751137] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:51,785 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:51,785 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:51,785 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362832048] [2021-06-05 15:06:51,785 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:51,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:51,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:51,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:51,785 INFO L87 Difference]: Start difference. First operand 3662 states and 15344 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,546 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:52,546 INFO L93 Difference]: Finished difference Result 4322 states and 17901 transitions. [2021-06-05 15:06:52,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:06:52,546 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:52,547 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:52,555 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 15:06:52,555 INFO L226 Difference]: Without dead ends: 4299 [2021-06-05 15:06:52,555 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 586.4ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:52,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4299 states. [2021-06-05 15:06:52,598 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4299 to 3656. [2021-06-05 15:06:52,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3656 states, 3655 states have (on average 4.191518467852257) internal successors, (15320), 3655 states have internal predecessors, (15320), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3656 states to 3656 states and 15320 transitions. [2021-06-05 15:06:52,609 INFO L78 Accepts]: Start accepts. Automaton has 3656 states and 15320 transitions. Word has length 23 [2021-06-05 15:06:52,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:52,610 INFO L482 AbstractCegarLoop]: Abstraction has 3656 states and 15320 transitions. [2021-06-05 15:06:52,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:52,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3656 states and 15320 transitions. [2021-06-05 15:06:52,614 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:52,614 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:52,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:52,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable456,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:52,815 INFO L430 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:52,815 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:52,815 INFO L82 PathProgramCache]: Analyzing trace with hash 1120166395, now seen corresponding path program 41 times [2021-06-05 15:06:52,815 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:52,815 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1849442241] [2021-06-05 15:06:52,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:52,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:52,895 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:52,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:52,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1849442241] [2021-06-05 15:06:52,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1849442241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:52,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616777101] [2021-06-05 15:06:52,896 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:52,920 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:52,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:52,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:52,921 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:53,011 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:53,011 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:06:53,012 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:53,020 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:53,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:53,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:06:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:53,080 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616777101] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:53,080 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:53,080 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:53,080 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992517470] [2021-06-05 15:06:53,080 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:53,080 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:53,080 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:53,080 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:53,080 INFO L87 Difference]: Start difference. First operand 3656 states and 15320 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:53,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:53,644 INFO L93 Difference]: Finished difference Result 4199 states and 17420 transitions. [2021-06-05 15:06:53,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:06:53,644 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:53,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:53,652 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 15:06:53,652 INFO L226 Difference]: Without dead ends: 4165 [2021-06-05 15:06:53,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 396.0ms TimeCoverageRelationStatistics Valid=140, Invalid=672, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:53,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4165 states. [2021-06-05 15:06:53,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4165 to 3677. [2021-06-05 15:06:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 4.1901523394994555) internal successors, (15403), 3676 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:53,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 15403 transitions. [2021-06-05 15:06:53,704 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 15403 transitions. Word has length 23 [2021-06-05 15:06:53,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:53,705 INFO L482 AbstractCegarLoop]: Abstraction has 3677 states and 15403 transitions. [2021-06-05 15:06:53,705 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:53,705 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 15403 transitions. [2021-06-05 15:06:53,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:53,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:53,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:53,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable458 [2021-06-05 15:06:53,910 INFO L430 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:53,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:53,910 INFO L82 PathProgramCache]: Analyzing trace with hash -208531025, now seen corresponding path program 42 times [2021-06-05 15:06:53,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:53,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622410476] [2021-06-05 15:06:53,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:53,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:53,991 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:53,991 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:53,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622410476] [2021-06-05 15:06:53,991 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622410476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:53,991 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167689052] [2021-06-05 15:06:53,991 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:54,016 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:06:54,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:54,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:06:54,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:54,127 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:06:54,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:06:54,131 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:06:54,147 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:06:54,147 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:54,147 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:06:54,182 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:54,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167689052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:54,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:54,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:06:54,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566822458] [2021-06-05 15:06:54,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:06:54,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:54,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:06:54,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:06:54,183 INFO L87 Difference]: Start difference. First operand 3677 states and 15403 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:54,716 INFO L93 Difference]: Finished difference Result 4199 states and 17414 transitions. [2021-06-05 15:06:54,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:06:54,717 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:54,717 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:54,724 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 15:06:54,724 INFO L226 Difference]: Without dead ends: 4168 [2021-06-05 15:06:54,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 350.3ms TimeCoverageRelationStatistics Valid=142, Invalid=914, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:06:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4168 states. [2021-06-05 15:06:54,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4168 to 3683. [2021-06-05 15:06:54,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3683 states, 3682 states have (on average 4.190928843020098) internal successors, (15431), 3682 states have internal predecessors, (15431), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3683 states to 3683 states and 15431 transitions. [2021-06-05 15:06:54,777 INFO L78 Accepts]: Start accepts. Automaton has 3683 states and 15431 transitions. Word has length 23 [2021-06-05 15:06:54,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:54,777 INFO L482 AbstractCegarLoop]: Abstraction has 3683 states and 15431 transitions. [2021-06-05 15:06:54,777 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:54,777 INFO L276 IsEmpty]: Start isEmpty. Operand 3683 states and 15431 transitions. [2021-06-05 15:06:54,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:54,782 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:54,782 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:54,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable460,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:54,985 INFO L430 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 379214297, now seen corresponding path program 43 times [2021-06-05 15:06:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:54,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1577532930] [2021-06-05 15:06:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:54,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:55,120 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:55,121 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:55,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1577532930] [2021-06-05 15:06:55,121 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1577532930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:55,121 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280427562] [2021-06-05 15:06:55,121 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:55,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:55,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:55,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:55,222 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:55,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:55,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:55,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:55,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:55,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:55,310 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:55,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280427562] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:55,310 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:55,310 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:55,310 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559355613] [2021-06-05 15:06:55,310 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:55,310 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:55,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:55,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:55,311 INFO L87 Difference]: Start difference. First operand 3683 states and 15431 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:55,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:55,863 INFO L93 Difference]: Finished difference Result 4103 states and 17052 transitions. [2021-06-05 15:06:55,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:55,863 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:55,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:55,870 INFO L225 Difference]: With dead ends: 4103 [2021-06-05 15:06:55,870 INFO L226 Difference]: Without dead ends: 4075 [2021-06-05 15:06:55,870 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 549.6ms TimeCoverageRelationStatistics Valid=153, Invalid=717, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:06:55,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4075 states. [2021-06-05 15:06:55,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4075 to 3689. [2021-06-05 15:06:55,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3689 states, 3688 states have (on average 4.190618221258134) internal successors, (15455), 3688 states have internal predecessors, (15455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:55,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3689 states to 3689 states and 15455 transitions. [2021-06-05 15:06:55,919 INFO L78 Accepts]: Start accepts. Automaton has 3689 states and 15455 transitions. Word has length 23 [2021-06-05 15:06:55,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:55,919 INFO L482 AbstractCegarLoop]: Abstraction has 3689 states and 15455 transitions. [2021-06-05 15:06:55,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:55,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3689 states and 15455 transitions. [2021-06-05 15:06:55,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:55,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:55,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:56,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable464 [2021-06-05 15:06:56,124 INFO L430 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:56,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:56,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1454925453, now seen corresponding path program 44 times [2021-06-05 15:06:56,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:56,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1148431691] [2021-06-05 15:06:56,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:56,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:56,210 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:56,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:56,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1148431691] [2021-06-05 15:06:56,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1148431691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:56,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1008240399] [2021-06-05 15:06:56,211 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:56,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:06:56,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:56,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:56,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:56,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:56,313 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:06:56,314 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:56,322 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:56,322 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:56,322 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:06:56,401 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:56,402 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1008240399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:56,402 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:56,402 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:06:56,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697868128] [2021-06-05 15:06:56,402 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:06:56,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:56,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:06:56,402 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:06:56,402 INFO L87 Difference]: Start difference. First operand 3689 states and 15455 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:57,134 INFO L93 Difference]: Finished difference Result 4219 states and 17490 transitions. [2021-06-05 15:06:57,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:06:57,135 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:57,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:57,142 INFO L225 Difference]: With dead ends: 4219 [2021-06-05 15:06:57,142 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 15:06:57,142 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 620.0ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:06:57,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 15:06:57,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3677. [2021-06-05 15:06:57,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3677 states, 3676 states have (on average 4.1901523394994555) internal successors, (15403), 3676 states have internal predecessors, (15403), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3677 states to 3677 states and 15403 transitions. [2021-06-05 15:06:57,192 INFO L78 Accepts]: Start accepts. Automaton has 3677 states and 15403 transitions. Word has length 23 [2021-06-05 15:06:57,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:57,192 INFO L482 AbstractCegarLoop]: Abstraction has 3677 states and 15403 transitions. [2021-06-05 15:06:57,192 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:57,192 INFO L276 IsEmpty]: Start isEmpty. Operand 3677 states and 15403 transitions. [2021-06-05 15:06:57,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:57,197 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:57,198 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:57,398 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable466 [2021-06-05 15:06:57,398 INFO L430 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:57,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:57,398 INFO L82 PathProgramCache]: Analyzing trace with hash 210561437, now seen corresponding path program 45 times [2021-06-05 15:06:57,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:57,398 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102263041] [2021-06-05 15:06:57,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:57,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:57,492 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:57,492 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102263041] [2021-06-05 15:06:57,492 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102263041] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:57,492 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507526680] [2021-06-05 15:06:57,492 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:57,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:06:57,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:57,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:57,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:57,601 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:57,602 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 15:06:57,606 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:57,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:57,622 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:57,622 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 15:06:57,759 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:57,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507526680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:57,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:57,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:06:57,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001191865] [2021-06-05 15:06:57,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:06:57,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:57,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:06:57,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:06:57,760 INFO L87 Difference]: Start difference. First operand 3677 states and 15403 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:58,334 INFO L93 Difference]: Finished difference Result 4112 states and 17055 transitions. [2021-06-05 15:06:58,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:06:58,335 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:58,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:58,342 INFO L225 Difference]: With dead ends: 4112 [2021-06-05 15:06:58,342 INFO L226 Difference]: Without dead ends: 4103 [2021-06-05 15:06:58,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 549.9ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:06:58,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4103 states. [2021-06-05 15:06:58,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4103 to 3733. [2021-06-05 15:06:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3733 states, 3732 states have (on average 4.193461950696677) internal successors, (15650), 3732 states have internal predecessors, (15650), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3733 states to 3733 states and 15650 transitions. [2021-06-05 15:06:58,393 INFO L78 Accepts]: Start accepts. Automaton has 3733 states and 15650 transitions. Word has length 23 [2021-06-05 15:06:58,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:58,393 INFO L482 AbstractCegarLoop]: Abstraction has 3733 states and 15650 transitions. [2021-06-05 15:06:58,393 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:58,393 INFO L276 IsEmpty]: Start isEmpty. Operand 3733 states and 15650 transitions. [2021-06-05 15:06:58,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:58,398 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:58,398 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:58,598 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable468,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:58,598 INFO L430 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:58,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:58,599 INFO L82 PathProgramCache]: Analyzing trace with hash -1901867193, now seen corresponding path program 46 times [2021-06-05 15:06:58,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:58,599 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31665506] [2021-06-05 15:06:58,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:58,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:58,681 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:58,681 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:58,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31665506] [2021-06-05 15:06:58,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31665506] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:58,681 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1722330727] [2021-06-05 15:06:58,681 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:58,706 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:06:58,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:58,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:06:58,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:58,795 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 15:06:58,799 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:06:58,814 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:06:58,814 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:06:58,814 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 15:06:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:58,905 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1722330727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:58,905 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:06:58,905 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:06:58,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753303383] [2021-06-05 15:06:58,905 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:06:58,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:06:58,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:06:58,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:06:58,906 INFO L87 Difference]: Start difference. First operand 3733 states and 15650 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:59,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:06:59,615 INFO L93 Difference]: Finished difference Result 4327 states and 17952 transitions. [2021-06-05 15:06:59,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:06:59,616 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:06:59,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:06:59,623 INFO L225 Difference]: With dead ends: 4327 [2021-06-05 15:06:59,623 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 15:06:59,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 599.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:06:59,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 15:06:59,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3739. [2021-06-05 15:06:59,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3739 states, 3738 states have (on average 4.193151417870519) internal successors, (15674), 3738 states have internal predecessors, (15674), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3739 states to 3739 states and 15674 transitions. [2021-06-05 15:06:59,675 INFO L78 Accepts]: Start accepts. Automaton has 3739 states and 15674 transitions. Word has length 23 [2021-06-05 15:06:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:06:59,675 INFO L482 AbstractCegarLoop]: Abstraction has 3739 states and 15674 transitions. [2021-06-05 15:06:59,675 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:06:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 3739 states and 15674 transitions. [2021-06-05 15:06:59,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:06:59,680 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:06:59,680 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:06:59,880 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable472,229 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:59,880 INFO L430 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:06:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:06:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash 1064402683, now seen corresponding path program 47 times [2021-06-05 15:06:59,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:06:59,881 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471497950] [2021-06-05 15:06:59,881 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:06:59,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:06:59,960 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:06:59,960 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:06:59,960 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471497950] [2021-06-05 15:06:59,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471497950] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:06:59,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1275840664] [2021-06-05 15:06:59,961 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:06:59,985 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:06:59,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:06:59,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:06:59,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:00,078 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:00,078 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 29 treesize of output 41 [2021-06-05 15:07:00,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:00,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:00,099 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:00,099 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:50 [2021-06-05 15:07:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1275840664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:00,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:00,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:07:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248687122] [2021-06-05 15:07:00,191 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:07:00,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:00,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:07:00,191 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:07:00,192 INFO L87 Difference]: Start difference. First operand 3739 states and 15674 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:00,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:00,997 INFO L93 Difference]: Finished difference Result 4413 states and 18287 transitions. [2021-06-05 15:07:00,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:00,997 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:00,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:01,005 INFO L225 Difference]: With dead ends: 4413 [2021-06-05 15:07:01,005 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 15:07:01,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 662.5ms TimeCoverageRelationStatistics Valid=163, Invalid=767, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:01,009 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 15:07:01,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3745. [2021-06-05 15:07:01,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3745 states, 3744 states have (on average 4.193910256410256) internal successors, (15702), 3744 states have internal predecessors, (15702), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:01,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3745 states to 3745 states and 15702 transitions. [2021-06-05 15:07:01,058 INFO L78 Accepts]: Start accepts. Automaton has 3745 states and 15702 transitions. Word has length 23 [2021-06-05 15:07:01,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:01,058 INFO L482 AbstractCegarLoop]: Abstraction has 3745 states and 15702 transitions. [2021-06-05 15:07:01,058 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:01,058 INFO L276 IsEmpty]: Start isEmpty. Operand 3745 states and 15702 transitions. [2021-06-05 15:07:01,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:01,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:01,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:01,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable478 [2021-06-05 15:07:01,263 INFO L430 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:01,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:01,264 INFO L82 PathProgramCache]: Analyzing trace with hash 1652148005, now seen corresponding path program 48 times [2021-06-05 15:07:01,264 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:01,264 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666516937] [2021-06-05 15:07:01,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:01,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:01,350 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:01,350 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:01,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666516937] [2021-06-05 15:07:01,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666516937] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:01,350 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004624454] [2021-06-05 15:07:01,350 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:01,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:01,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:01,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:01,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:01,440 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:01,440 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 26 treesize of output 32 [2021-06-05 15:07:01,441 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:01,449 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:01,450 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:01,450 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:26 [2021-06-05 15:07:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:01,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2004624454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:01,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:01,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 16 [2021-06-05 15:07:01,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929714476] [2021-06-05 15:07:01,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:07:01,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:01,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:07:01,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:07:01,521 INFO L87 Difference]: Start difference. First operand 3745 states and 15702 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:02,048 INFO L93 Difference]: Finished difference Result 4073 states and 16946 transitions. [2021-06-05 15:07:02,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:02,048 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:02,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:02,056 INFO L225 Difference]: With dead ends: 4073 [2021-06-05 15:07:02,056 INFO L226 Difference]: Without dead ends: 4064 [2021-06-05 15:07:02,056 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 382.9ms TimeCoverageRelationStatistics Valid=134, Invalid=568, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:02,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4064 states. [2021-06-05 15:07:02,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4064 to 3751. [2021-06-05 15:07:02,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3751 states, 3750 states have (on average 4.1936) internal successors, (15726), 3750 states have internal predecessors, (15726), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3751 states to 3751 states and 15726 transitions. [2021-06-05 15:07:02,105 INFO L78 Accepts]: Start accepts. Automaton has 3751 states and 15726 transitions. Word has length 23 [2021-06-05 15:07:02,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:02,105 INFO L482 AbstractCegarLoop]: Abstraction has 3751 states and 15726 transitions. [2021-06-05 15:07:02,105 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3751 states and 15726 transitions. [2021-06-05 15:07:02,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:02,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:02,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:02,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable484 [2021-06-05 15:07:02,311 INFO L430 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:02,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:02,311 INFO L82 PathProgramCache]: Analyzing trace with hash -1567108135, now seen corresponding path program 49 times [2021-06-05 15:07:02,311 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:02,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673961583] [2021-06-05 15:07:02,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:02,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:02,395 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:02,395 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:02,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673961583] [2021-06-05 15:07:02,395 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [673961583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,395 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149607088] [2021-06-05 15:07:02,395 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-06-05 15:07:02,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:02,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:02,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:02,500 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:02,500 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 26 treesize of output 40 [2021-06-05 15:07:02,501 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:02,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:02,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:31 [2021-06-05 15:07:02,645 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:02,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149607088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:02,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:02,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:07:02,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1062173602] [2021-06-05 15:07:02,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:07:02,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:02,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:07:02,646 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:07:02,646 INFO L87 Difference]: Start difference. First operand 3751 states and 15726 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:02,900 WARN L205 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 60 [2021-06-05 15:07:03,503 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 57 DAG size of output: 57 [2021-06-05 15:07:03,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:03,710 INFO L93 Difference]: Finished difference Result 4206 states and 17475 transitions. [2021-06-05 15:07:03,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:07:03,710 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:03,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:03,719 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 15:07:03,719 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 15:07:03,719 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 166 ImplicationChecksByTransitivity, 937.6ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:03,723 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 15:07:03,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3759. [2021-06-05 15:07:03,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3759 states, 3758 states have (on average 4.193720063863758) internal successors, (15760), 3758 states have internal predecessors, (15760), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3759 states to 3759 states and 15760 transitions. [2021-06-05 15:07:03,774 INFO L78 Accepts]: Start accepts. Automaton has 3759 states and 15760 transitions. Word has length 23 [2021-06-05 15:07:03,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:03,774 INFO L482 AbstractCegarLoop]: Abstraction has 3759 states and 15760 transitions. [2021-06-05 15:07:03,774 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:03,774 INFO L276 IsEmpty]: Start isEmpty. Operand 3759 states and 15760 transitions. [2021-06-05 15:07:03,779 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:03,780 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:03,780 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:03,980 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable486 [2021-06-05 15:07:03,980 INFO L430 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:03,980 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:03,980 INFO L82 PathProgramCache]: Analyzing trace with hash -1525104667, now seen corresponding path program 50 times [2021-06-05 15:07:03,980 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:03,980 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925621685] [2021-06-05 15:07:03,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:03,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:04,069 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:04,070 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925621685] [2021-06-05 15:07:04,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925621685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:04,070 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164657336] [2021-06-05 15:07:04,070 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:04,094 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:04,094 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:04,095 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:04,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:04,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:04,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:04,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:04,205 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:04,206 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:04,206 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:04,264 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:04,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1164657336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:04,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:04,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:04,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358617048] [2021-06-05 15:07:04,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:04,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:04,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:04,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:04,265 INFO L87 Difference]: Start difference. First operand 3759 states and 15760 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:05,225 INFO L93 Difference]: Finished difference Result 4690 states and 19442 transitions. [2021-06-05 15:07:05,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:07:05,225 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:05,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:05,233 INFO L225 Difference]: With dead ends: 4690 [2021-06-05 15:07:05,233 INFO L226 Difference]: Without dead ends: 4666 [2021-06-05 15:07:05,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 641.4ms TimeCoverageRelationStatistics Valid=218, Invalid=972, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:07:05,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-06-05 15:07:05,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3783. [2021-06-05 15:07:05,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.195928080380751) internal successors, (15869), 3782 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15869 transitions. [2021-06-05 15:07:05,286 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15869 transitions. Word has length 23 [2021-06-05 15:07:05,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:05,286 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15869 transitions. [2021-06-05 15:07:05,286 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:05,286 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15869 transitions. [2021-06-05 15:07:05,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:05,291 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:05,292 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:05,492 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable492,233 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:05,492 INFO L430 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:05,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:05,492 INFO L82 PathProgramCache]: Analyzing trace with hash 1863701669, now seen corresponding path program 51 times [2021-06-05 15:07:05,492 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:05,492 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1439618739] [2021-06-05 15:07:05,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:05,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:05,586 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:05,586 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1439618739] [2021-06-05 15:07:05,586 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1439618739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:05,586 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557550115] [2021-06-05 15:07:05,586 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:05,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:05,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:05,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:05,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:05,686 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:05,686 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:05,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:05,692 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 15:07:05,693 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:05,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:05,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:05,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:29 [2021-06-05 15:07:05,787 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:05,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1557550115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:05,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:05,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:05,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015054923] [2021-06-05 15:07:05,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:05,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:05,787 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:05,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:05,788 INFO L87 Difference]: Start difference. First operand 3783 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:06,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:06,307 INFO L93 Difference]: Finished difference Result 4448 states and 18449 transitions. [2021-06-05 15:07:06,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:06,308 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:06,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:06,315 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 15:07:06,316 INFO L226 Difference]: Without dead ends: 4420 [2021-06-05 15:07:06,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 404.9ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:06,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-06-05 15:07:06,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3789. [2021-06-05 15:07:06,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195617740232312) internal successors, (15893), 3788 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:06,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15893 transitions. [2021-06-05 15:07:06,369 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15893 transitions. Word has length 23 [2021-06-05 15:07:06,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:06,369 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15893 transitions. [2021-06-05 15:07:06,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:06,369 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15893 transitions. [2021-06-05 15:07:06,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:06,374 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:06,374 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:06,574 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable494,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:06,575 INFO L430 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:06,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:06,575 INFO L82 PathProgramCache]: Analyzing trace with hash -1355554471, now seen corresponding path program 52 times [2021-06-05 15:07:06,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:06,575 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334635190] [2021-06-05 15:07:06,575 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:06,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:06,669 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:06,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334635190] [2021-06-05 15:07:06,669 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [334635190] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:06,669 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699866439] [2021-06-05 15:07:06,669 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:06,696 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:06,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:06,697 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:06,697 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:06,771 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:06,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:06,772 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:06,780 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:06,780 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:06,781 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:06,858 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:06,858 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [699866439] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:06,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:06,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:06,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685749555] [2021-06-05 15:07:06,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:06,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:06,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:06,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:06,859 INFO L87 Difference]: Start difference. First operand 3789 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:07,760 INFO L93 Difference]: Finished difference Result 4477 states and 18578 transitions. [2021-06-05 15:07:07,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:07,760 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:07,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:07,768 INFO L225 Difference]: With dead ends: 4477 [2021-06-05 15:07:07,768 INFO L226 Difference]: Without dead ends: 4454 [2021-06-05 15:07:07,768 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 262 ImplicationChecksByTransitivity, 743.1ms TimeCoverageRelationStatistics Valid=249, Invalid=941, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:07:07,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4454 states. [2021-06-05 15:07:07,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4454 to 3777. [2021-06-05 15:07:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.195444915254237) internal successors, (15842), 3776 states have internal predecessors, (15842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15842 transitions. [2021-06-05 15:07:07,823 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15842 transitions. Word has length 23 [2021-06-05 15:07:07,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:07,823 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15842 transitions. [2021-06-05 15:07:07,823 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:07,823 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15842 transitions. [2021-06-05 15:07:07,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:07,828 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:07,828 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:08,028 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable495,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:08,029 INFO L430 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:08,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:08,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1690313529, now seen corresponding path program 53 times [2021-06-05 15:07:08,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:08,029 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374527905] [2021-06-05 15:07:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:08,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:08,127 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:08,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374527905] [2021-06-05 15:07:08,127 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [374527905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:08,127 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199051700] [2021-06-05 15:07:08,127 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:08,152 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:07:08,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:08,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:08,153 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:08,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:08,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:08,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:08,247 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:08,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:08,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:08,306 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:08,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199051700] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:08,306 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:08,306 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:08,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138112040] [2021-06-05 15:07:08,306 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:08,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:08,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:08,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:08,307 INFO L87 Difference]: Start difference. First operand 3777 states and 15842 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:08,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:08,892 INFO L93 Difference]: Finished difference Result 4607 states and 19073 transitions. [2021-06-05 15:07:08,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:07:08,892 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:08,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:08,900 INFO L225 Difference]: With dead ends: 4607 [2021-06-05 15:07:08,900 INFO L226 Difference]: Without dead ends: 4576 [2021-06-05 15:07:08,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 432.0ms TimeCoverageRelationStatistics Valid=161, Invalid=709, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:07:08,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4576 states. [2021-06-05 15:07:08,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4576 to 3783. [2021-06-05 15:07:08,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.196192490745637) internal successors, (15870), 3782 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:08,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15870 transitions. [2021-06-05 15:07:08,958 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15870 transitions. Word has length 23 [2021-06-05 15:07:08,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:08,958 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15870 transitions. [2021-06-05 15:07:08,958 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:08,958 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15870 transitions. [2021-06-05 15:07:08,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:08,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:08,963 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:09,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable497,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:09,164 INFO L430 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:09,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:09,164 INFO L82 PathProgramCache]: Analyzing trace with hash -1102568207, now seen corresponding path program 54 times [2021-06-05 15:07:09,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:09,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134547148] [2021-06-05 15:07:09,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:09,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:09,257 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:09,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134547148] [2021-06-05 15:07:09,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134547148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:09,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1338387152] [2021-06-05 15:07:09,257 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:09,282 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:09,282 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:09,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:09,283 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:09,398 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:07:09,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 15:07:09,400 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:09,412 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:09,412 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:09,413 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 15:07:09,487 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:09,488 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1338387152] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:09,488 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:09,488 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:09,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1135207641] [2021-06-05 15:07:09,488 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:09,488 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:09,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:09,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:09,488 INFO L87 Difference]: Start difference. First operand 3783 states and 15870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:10,247 INFO L93 Difference]: Finished difference Result 4287 states and 17822 transitions. [2021-06-05 15:07:10,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:07:10,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:10,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:10,255 INFO L225 Difference]: With dead ends: 4287 [2021-06-05 15:07:10,255 INFO L226 Difference]: Without dead ends: 4259 [2021-06-05 15:07:10,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 544.6ms TimeCoverageRelationStatistics Valid=206, Invalid=1126, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:07:10,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4259 states. [2021-06-05 15:07:10,296 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4259 to 3789. [2021-06-05 15:07:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195881731784583) internal successors, (15894), 3788 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15894 transitions. [2021-06-05 15:07:10,308 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15894 transitions. Word has length 23 [2021-06-05 15:07:10,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:10,308 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15894 transitions. [2021-06-05 15:07:10,308 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:10,308 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15894 transitions. [2021-06-05 15:07:10,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:10,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:10,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:10,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable499 [2021-06-05 15:07:10,517 INFO L430 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:10,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:10,517 INFO L82 PathProgramCache]: Analyzing trace with hash -26857051, now seen corresponding path program 55 times [2021-06-05 15:07:10,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:10,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2013878135] [2021-06-05 15:07:10,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:10,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:10,610 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:10,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:10,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2013878135] [2021-06-05 15:07:10,610 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2013878135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:10,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348968548] [2021-06-05 15:07:10,610 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:10,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:10,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:10,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:10,706 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:10,707 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:10,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:10,716 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:10,717 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:10,717 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:10,792 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:10,793 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348968548] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:10,793 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:10,793 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:10,793 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559079258] [2021-06-05 15:07:10,793 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:10,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:10,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:10,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:10,793 INFO L87 Difference]: Start difference. First operand 3789 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:11,550 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:11,550 INFO L93 Difference]: Finished difference Result 4408 states and 18310 transitions. [2021-06-05 15:07:11,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:11,551 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:11,551 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:11,558 INFO L225 Difference]: With dead ends: 4408 [2021-06-05 15:07:11,558 INFO L226 Difference]: Without dead ends: 4385 [2021-06-05 15:07:11,559 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 674.8ms TimeCoverageRelationStatistics Valid=221, Invalid=901, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:11,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4385 states. [2021-06-05 15:07:11,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4385 to 3771. [2021-06-05 15:07:11,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 4.1938992042440315) internal successors, (15811), 3770 states have internal predecessors, (15811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:11,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 15811 transitions. [2021-06-05 15:07:11,612 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 15811 transitions. Word has length 23 [2021-06-05 15:07:11,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:11,612 INFO L482 AbstractCegarLoop]: Abstraction has 3771 states and 15811 transitions. [2021-06-05 15:07:11,612 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:11,612 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 15811 transitions. [2021-06-05 15:07:11,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:11,617 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:11,617 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:11,818 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable503,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:11,818 INFO L430 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:11,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:11,818 INFO L82 PathProgramCache]: Analyzing trace with hash -1699183323, now seen corresponding path program 56 times [2021-06-05 15:07:11,818 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:11,818 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803231392] [2021-06-05 15:07:11,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:11,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:11,906 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:11,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:11,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803231392] [2021-06-05 15:07:11,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [803231392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:11,907 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1346712242] [2021-06-05 15:07:11,907 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:11,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:11,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:11,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:11,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:12,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:12,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:12,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:12,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:12,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:12,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:12,091 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:12,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1346712242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:12,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:12,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:12,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [214752083] [2021-06-05 15:07:12,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:12,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:12,092 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:12,092 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:12,092 INFO L87 Difference]: Start difference. First operand 3771 states and 15811 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:12,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:12,497 INFO L93 Difference]: Finished difference Result 4227 states and 17567 transitions. [2021-06-05 15:07:12,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:07:12,497 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:12,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:12,505 INFO L225 Difference]: With dead ends: 4227 [2021-06-05 15:07:12,505 INFO L226 Difference]: Without dead ends: 4193 [2021-06-05 15:07:12,505 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:07:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4193 states. [2021-06-05 15:07:12,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4193 to 3777. [2021-06-05 15:07:12,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.193591101694915) internal successors, (15835), 3776 states have internal predecessors, (15835), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:12,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15835 transitions. [2021-06-05 15:07:12,557 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15835 transitions. Word has length 23 [2021-06-05 15:07:12,557 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:12,557 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15835 transitions. [2021-06-05 15:07:12,558 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:12,558 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15835 transitions. [2021-06-05 15:07:12,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:12,563 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:12,563 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:12,763 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable505,239 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:12,763 INFO L430 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:12,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:12,763 INFO L82 PathProgramCache]: Analyzing trace with hash 1267086553, now seen corresponding path program 57 times [2021-06-05 15:07:12,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:12,764 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654331313] [2021-06-05 15:07:12,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:12,765 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:12,851 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:12,851 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654331313] [2021-06-05 15:07:12,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654331313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:12,852 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777160409] [2021-06-05 15:07:12,852 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:12,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:12,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:12,877 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:12,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:12,994 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:07:12,994 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:07:12,997 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:13,012 INFO L628 ElimStorePlain]: treesize reduction 53, result has 20.9 percent of original size [2021-06-05 15:07:13,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:13,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:07:13,049 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:13,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777160409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:13,049 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:13,049 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:13,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1505176345] [2021-06-05 15:07:13,049 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:13,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:13,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:13,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:13,049 INFO L87 Difference]: Start difference. First operand 3777 states and 15835 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,719 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:13,719 INFO L93 Difference]: Finished difference Result 4426 states and 18356 transitions. [2021-06-05 15:07:13,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:07:13,719 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:13,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:13,729 INFO L225 Difference]: With dead ends: 4426 [2021-06-05 15:07:13,729 INFO L226 Difference]: Without dead ends: 4395 [2021-06-05 15:07:13,729 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 415.6ms TimeCoverageRelationStatistics Valid=159, Invalid=1101, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:07:13,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4395 states. [2021-06-05 15:07:13,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4395 to 3783. [2021-06-05 15:07:13,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.194341618191433) internal successors, (15863), 3782 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,783 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15863 transitions. [2021-06-05 15:07:13,783 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15863 transitions. Word has length 23 [2021-06-05 15:07:13,783 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:13,783 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15863 transitions. [2021-06-05 15:07:13,783 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:13,783 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15863 transitions. [2021-06-05 15:07:13,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:13,788 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:13,788 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:13,988 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable507 [2021-06-05 15:07:13,988 INFO L430 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:13,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:13,989 INFO L82 PathProgramCache]: Analyzing trace with hash 1854831875, now seen corresponding path program 58 times [2021-06-05 15:07:13,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:13,989 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166044482] [2021-06-05 15:07:13,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:13,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:14,081 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:14,082 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166044482] [2021-06-05 15:07:14,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166044482] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:14,082 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976180486] [2021-06-05 15:07:14,082 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:14,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:14,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:14,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:14,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:14,180 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:14,180 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:14,181 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:14,189 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:14,190 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:14,190 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:14,265 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:14,265 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1976180486] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:14,265 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:14,265 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:14,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383677752] [2021-06-05 15:07:14,265 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:14,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:14,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:14,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:14,266 INFO L87 Difference]: Start difference. First operand 3783 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:14,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:14,837 INFO L93 Difference]: Finished difference Result 4228 states and 17591 transitions. [2021-06-05 15:07:14,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:14,837 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:14,837 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:14,844 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 15:07:14,844 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 15:07:14,845 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:07:14,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 15:07:14,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3789. [2021-06-05 15:07:14,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.194033790918691) internal successors, (15887), 3788 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:14,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15887 transitions. [2021-06-05 15:07:14,894 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15887 transitions. Word has length 23 [2021-06-05 15:07:14,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:14,894 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15887 transitions. [2021-06-05 15:07:14,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:14,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15887 transitions. [2021-06-05 15:07:14,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:14,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:14,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:15,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable511,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:15,100 INFO L430 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:15,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:15,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1364424265, now seen corresponding path program 59 times [2021-06-05 15:07:15,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:15,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1739466854] [2021-06-05 15:07:15,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:15,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:15,192 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:15,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:15,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1739466854] [2021-06-05 15:07:15,192 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1739466854] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:15,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [574075061] [2021-06-05 15:07:15,192 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:15,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:07:15,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:15,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:15,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:15,293 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:15,293 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:15,294 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:15,302 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:15,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:15,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:15,378 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:15,378 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [574075061] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:15,378 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:15,378 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:15,378 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460256195] [2021-06-05 15:07:15,378 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:15,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:15,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:15,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:15,379 INFO L87 Difference]: Start difference. First operand 3789 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:16,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:16,056 INFO L93 Difference]: Finished difference Result 4302 states and 17890 transitions. [2021-06-05 15:07:16,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:07:16,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:16,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:16,064 INFO L225 Difference]: With dead ends: 4302 [2021-06-05 15:07:16,064 INFO L226 Difference]: Without dead ends: 4279 [2021-06-05 15:07:16,064 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 645.1ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:07:16,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4279 states. [2021-06-05 15:07:16,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4279 to 3765. [2021-06-05 15:07:16,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3765 states, 3764 states have (on average 4.193411264612115) internal successors, (15784), 3764 states have internal predecessors, (15784), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:16,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3765 states to 3765 states and 15784 transitions. [2021-06-05 15:07:16,119 INFO L78 Accepts]: Start accepts. Automaton has 3765 states and 15784 transitions. Word has length 23 [2021-06-05 15:07:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:16,119 INFO L482 AbstractCegarLoop]: Abstraction has 3765 states and 15784 transitions. [2021-06-05 15:07:16,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:16,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3765 states and 15784 transitions. [2021-06-05 15:07:16,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:16,147 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:16,147 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:16,348 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable513,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:16,348 INFO L430 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:16,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:16,348 INFO L82 PathProgramCache]: Analyzing trace with hash 1496928921, now seen corresponding path program 60 times [2021-06-05 15:07:16,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:16,348 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744912587] [2021-06-05 15:07:16,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:16,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:16,435 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744912587] [2021-06-05 15:07:16,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744912587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:16,435 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919804473] [2021-06-05 15:07:16,435 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:16,459 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:16,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:16,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:16,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:16,557 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:16,577 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:07:16,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 15:07:16,580 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:16,592 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 15:07:16,593 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:16,593 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 15:07:16,626 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:16,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919804473] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:16,626 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:16,626 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:16,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910062549] [2021-06-05 15:07:16,627 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:16,627 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:16,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:16,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:16,627 INFO L87 Difference]: Start difference. First operand 3765 states and 15784 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:17,414 INFO L93 Difference]: Finished difference Result 4660 states and 19308 transitions. [2021-06-05 15:07:17,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:07:17,414 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:17,414 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:17,422 INFO L225 Difference]: With dead ends: 4660 [2021-06-05 15:07:17,422 INFO L226 Difference]: Without dead ends: 4636 [2021-06-05 15:07:17,422 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 481.4ms TimeCoverageRelationStatistics Valid=209, Invalid=1431, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:07:17,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4636 states. [2021-06-05 15:07:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4636 to 3783. [2021-06-05 15:07:17,468 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.196192490745637) internal successors, (15870), 3782 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,476 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15870 transitions. [2021-06-05 15:07:17,476 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15870 transitions. Word has length 23 [2021-06-05 15:07:17,476 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:17,477 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15870 transitions. [2021-06-05 15:07:17,477 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:17,477 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15870 transitions. [2021-06-05 15:07:17,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:17,482 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:17,482 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:17,682 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable515 [2021-06-05 15:07:17,682 INFO L430 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:17,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:17,682 INFO L82 PathProgramCache]: Analyzing trace with hash 590767961, now seen corresponding path program 61 times [2021-06-05 15:07:17,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:17,683 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227577568] [2021-06-05 15:07:17,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:17,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:17,786 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:17,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:17,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227577568] [2021-06-05 15:07:17,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227577568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058153837] [2021-06-05 15:07:17,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:17,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:17,811 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:17,811 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:17,883 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:17,883 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:17,884 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:17,892 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:17,893 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:17,893 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:17,969 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:17,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2058153837] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:17,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:17,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:17,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241406724] [2021-06-05 15:07:17,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:17,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:17,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:17,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=269, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:17,970 INFO L87 Difference]: Start difference. First operand 3783 states and 15870 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:18,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:18,631 INFO L93 Difference]: Finished difference Result 4546 states and 18846 transitions. [2021-06-05 15:07:18,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:18,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:18,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:18,639 INFO L225 Difference]: With dead ends: 4546 [2021-06-05 15:07:18,639 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 15:07:18,640 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 564.9ms TimeCoverageRelationStatistics Valid=204, Invalid=788, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:07:18,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 15:07:18,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3789. [2021-06-05 15:07:18,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.195881731784583) internal successors, (15894), 3788 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:18,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15894 transitions. [2021-06-05 15:07:18,692 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15894 transitions. Word has length 23 [2021-06-05 15:07:18,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:18,692 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15894 transitions. [2021-06-05 15:07:18,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:18,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15894 transitions. [2021-06-05 15:07:18,722 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:18,722 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:18,722 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:18,922 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable519,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:18,922 INFO L430 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:18,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:18,923 INFO L82 PathProgramCache]: Analyzing trace with hash 1666479117, now seen corresponding path program 62 times [2021-06-05 15:07:18,923 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:18,923 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919389614] [2021-06-05 15:07:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:18,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:19,014 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:19,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919389614] [2021-06-05 15:07:19,014 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1919389614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:19,014 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011664316] [2021-06-05 15:07:19,014 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:19,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:19,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:19,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:19,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:19,110 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:19,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:19,111 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:19,119 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:19,119 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:19,119 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:19,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:19,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1011664316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:19,196 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:19,196 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:19,196 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514874918] [2021-06-05 15:07:19,197 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:19,197 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:19,197 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:19,197 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:19,197 INFO L87 Difference]: Start difference. First operand 3789 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:20,060 INFO L93 Difference]: Finished difference Result 4455 states and 18490 transitions. [2021-06-05 15:07:20,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:20,060 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:20,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:20,068 INFO L225 Difference]: With dead ends: 4455 [2021-06-05 15:07:20,068 INFO L226 Difference]: Without dead ends: 4432 [2021-06-05 15:07:20,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 675.7ms TimeCoverageRelationStatistics Valid=248, Invalid=942, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:07:20,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4432 states. [2021-06-05 15:07:20,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4432 to 3777. [2021-06-05 15:07:20,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.195709745762712) internal successors, (15843), 3776 states have internal predecessors, (15843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15843 transitions. [2021-06-05 15:07:20,123 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15843 transitions. Word has length 23 [2021-06-05 15:07:20,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:20,123 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15843 transitions. [2021-06-05 15:07:20,123 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:20,123 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15843 transitions. [2021-06-05 15:07:20,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:20,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:20,129 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:20,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable521 [2021-06-05 15:07:20,329 INFO L430 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:20,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:20,329 INFO L82 PathProgramCache]: Analyzing trace with hash 1331720059, now seen corresponding path program 63 times [2021-06-05 15:07:20,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:20,330 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [433534798] [2021-06-05 15:07:20,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:20,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:20,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:20,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [433534798] [2021-06-05 15:07:20,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [433534798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:20,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573222738] [2021-06-05 15:07:20,416 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:20,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:07:20,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:20,442 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:20,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:20,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:20,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:20,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:20,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:20,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:20,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:20,596 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:20,596 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573222738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:20,596 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:20,596 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:20,596 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784453224] [2021-06-05 15:07:20,596 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:20,596 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:20,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:20,597 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:20,597 INFO L87 Difference]: Start difference. First operand 3777 states and 15843 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:21,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:21,193 INFO L93 Difference]: Finished difference Result 4636 states and 19200 transitions. [2021-06-05 15:07:21,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:07:21,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:21,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:21,201 INFO L225 Difference]: With dead ends: 4636 [2021-06-05 15:07:21,201 INFO L226 Difference]: Without dead ends: 4605 [2021-06-05 15:07:21,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 398.8ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:07:21,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4605 states. [2021-06-05 15:07:21,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4605 to 3783. [2021-06-05 15:07:21,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.1964569011105235) internal successors, (15871), 3782 states have internal predecessors, (15871), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:21,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15871 transitions. [2021-06-05 15:07:21,255 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15871 transitions. Word has length 23 [2021-06-05 15:07:21,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:21,255 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15871 transitions. [2021-06-05 15:07:21,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:21,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15871 transitions. [2021-06-05 15:07:21,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:21,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:21,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:21,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable523,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:21,460 INFO L430 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:21,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:21,461 INFO L82 PathProgramCache]: Analyzing trace with hash 1919465381, now seen corresponding path program 64 times [2021-06-05 15:07:21,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:21,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30788947] [2021-06-05 15:07:21,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:21,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:21,574 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:21,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30788947] [2021-06-05 15:07:21,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30788947] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1946187457] [2021-06-05 15:07:21,574 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:21,598 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:21,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:21,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:21,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:21,669 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:21,669 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:21,670 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,678 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:21,678 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:21,678 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:21,753 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:21,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1946187457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:21,754 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:21,754 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:21,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043974233] [2021-06-05 15:07:21,754 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:21,754 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:21,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:21,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:21,754 INFO L87 Difference]: Start difference. First operand 3783 states and 15871 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:22,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:22,423 INFO L93 Difference]: Finished difference Result 4407 states and 18305 transitions. [2021-06-05 15:07:22,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:22,424 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:22,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:22,432 INFO L225 Difference]: With dead ends: 4407 [2021-06-05 15:07:22,432 INFO L226 Difference]: Without dead ends: 4379 [2021-06-05 15:07:22,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 544.1ms TimeCoverageRelationStatistics Valid=199, Invalid=793, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:07:22,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4379 states. [2021-06-05 15:07:22,474 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4379 to 3789. [2021-06-05 15:07:22,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.196145723336853) internal successors, (15895), 3788 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:22,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15895 transitions. [2021-06-05 15:07:22,485 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15895 transitions. Word has length 23 [2021-06-05 15:07:22,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:22,485 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15895 transitions. [2021-06-05 15:07:22,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:22,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15895 transitions. [2021-06-05 15:07:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:22,491 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:22,491 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:22,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 247 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable525 [2021-06-05 15:07:22,691 INFO L430 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:22,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:22,691 INFO L82 PathProgramCache]: Analyzing trace with hash -1299790759, now seen corresponding path program 65 times [2021-06-05 15:07:22,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:22,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051043206] [2021-06-05 15:07:22,692 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:22,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:22,780 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:22,781 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:22,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051043206] [2021-06-05 15:07:22,781 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051043206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:22,781 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55369749] [2021-06-05 15:07:22,781 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:22,805 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:07:22,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:22,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:22,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:22,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:22,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:22,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:22,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:22,884 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:22,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:22,959 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:22,959 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55369749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:22,959 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:22,959 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:22,959 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926932150] [2021-06-05 15:07:22,959 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:22,959 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:22,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:22,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=267, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:22,959 INFO L87 Difference]: Start difference. First operand 3789 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:23,683 INFO L93 Difference]: Finished difference Result 4332 states and 18009 transitions. [2021-06-05 15:07:23,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:07:23,683 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:23,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:23,692 INFO L225 Difference]: With dead ends: 4332 [2021-06-05 15:07:23,692 INFO L226 Difference]: Without dead ends: 4309 [2021-06-05 15:07:23,692 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 255 ImplicationChecksByTransitivity, 594.2ms TimeCoverageRelationStatistics Valid=220, Invalid=902, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:23,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4309 states. [2021-06-05 15:07:23,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4309 to 3771. [2021-06-05 15:07:23,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3771 states, 3770 states have (on average 4.1941644562334215) internal successors, (15812), 3770 states have internal predecessors, (15812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3771 states to 3771 states and 15812 transitions. [2021-06-05 15:07:23,748 INFO L78 Accepts]: Start accepts. Automaton has 3771 states and 15812 transitions. Word has length 23 [2021-06-05 15:07:23,748 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:23,748 INFO L482 AbstractCegarLoop]: Abstraction has 3771 states and 15812 transitions. [2021-06-05 15:07:23,748 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:23,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3771 states and 15812 transitions. [2021-06-05 15:07:23,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:23,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:23,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:23,955 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable527,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:23,955 INFO L430 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:23,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:23,956 INFO L82 PathProgramCache]: Analyzing trace with hash -615499709, now seen corresponding path program 66 times [2021-06-05 15:07:23,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:23,956 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37589697] [2021-06-05 15:07:23,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:23,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:24,040 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:24,041 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37589697] [2021-06-05 15:07:24,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37589697] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:24,041 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110284565] [2021-06-05 15:07:24,041 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:24,089 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:24,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:24,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:24,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:24,227 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:07:24,227 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 15:07:24,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:24,259 INFO L628 ElimStorePlain]: treesize reduction 82, result has 14.6 percent of original size [2021-06-05 15:07:24,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:24,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:14 [2021-06-05 15:07:24,296 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:24,296 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110284565] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:24,296 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:24,296 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:24,296 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607582646] [2021-06-05 15:07:24,296 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:24,296 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:24,297 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:24,297 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:24,297 INFO L87 Difference]: Start difference. First operand 3771 states and 15812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:25,138 INFO L93 Difference]: Finished difference Result 4648 states and 19256 transitions. [2021-06-05 15:07:25,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:07:25,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:25,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:25,147 INFO L225 Difference]: With dead ends: 4648 [2021-06-05 15:07:25,147 INFO L226 Difference]: Without dead ends: 4624 [2021-06-05 15:07:25,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 314 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=176, Invalid=1306, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:07:25,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4624 states. [2021-06-05 15:07:25,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4624 to 3783. [2021-06-05 15:07:25,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.194341618191433) internal successors, (15863), 3782 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15863 transitions. [2021-06-05 15:07:25,201 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15863 transitions. Word has length 23 [2021-06-05 15:07:25,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:25,201 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15863 transitions. [2021-06-05 15:07:25,201 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:25,201 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15863 transitions. [2021-06-05 15:07:25,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:25,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:25,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:25,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable529 [2021-06-05 15:07:25,407 INFO L430 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:25,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:25,407 INFO L82 PathProgramCache]: Analyzing trace with hash -1521660669, now seen corresponding path program 67 times [2021-06-05 15:07:25,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:25,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799729776] [2021-06-05 15:07:25,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:25,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:25,500 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:25,500 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:25,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799729776] [2021-06-05 15:07:25,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [799729776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,500 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681983596] [2021-06-05 15:07:25,501 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:25,526 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:25,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:25,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:25,604 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:25,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:25,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:25,613 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:25,613 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:25,690 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:25,690 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681983596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:25,690 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:25,690 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:25,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747735738] [2021-06-05 15:07:25,690 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:25,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:25,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:25,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:25,691 INFO L87 Difference]: Start difference. First operand 3783 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:26,360 INFO L93 Difference]: Finished difference Result 4458 states and 18490 transitions. [2021-06-05 15:07:26,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:07:26,360 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:26,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:26,368 INFO L225 Difference]: With dead ends: 4458 [2021-06-05 15:07:26,369 INFO L226 Difference]: Without dead ends: 4430 [2021-06-05 15:07:26,369 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 555.8ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:26,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-06-05 15:07:26,409 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3789. [2021-06-05 15:07:26,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.194033790918691) internal successors, (15887), 3788 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15887 transitions. [2021-06-05 15:07:26,421 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15887 transitions. Word has length 23 [2021-06-05 15:07:26,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:26,421 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15887 transitions. [2021-06-05 15:07:26,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:26,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15887 transitions. [2021-06-05 15:07:26,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:26,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:26,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:26,628 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable533 [2021-06-05 15:07:26,629 INFO L430 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:26,629 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:26,629 INFO L82 PathProgramCache]: Analyzing trace with hash -445949513, now seen corresponding path program 68 times [2021-06-05 15:07:26,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:26,629 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31409637] [2021-06-05 15:07:26,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:26,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:26,747 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:26,748 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31409637] [2021-06-05 15:07:26,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31409637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:26,748 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [980695311] [2021-06-05 15:07:26,748 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:26,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:26,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:26,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:26,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:26,848 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:26,849 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:26,850 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:26,857 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:26,858 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:26,858 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:26,934 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:26,934 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [980695311] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:26,934 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:26,934 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:26,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226699385] [2021-06-05 15:07:26,934 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:26,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:26,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:26,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:26,934 INFO L87 Difference]: Start difference. First operand 3789 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,592 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:27,592 INFO L93 Difference]: Finished difference Result 4328 states and 17986 transitions. [2021-06-05 15:07:27,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:07:27,593 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:27,593 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:27,600 INFO L225 Difference]: With dead ends: 4328 [2021-06-05 15:07:27,600 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 15:07:27,600 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 629.5ms TimeCoverageRelationStatistics Valid=203, Invalid=853, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:07:27,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 15:07:27,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3777. [2021-06-05 15:07:27,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3777 states, 3776 states have (on average 4.19385593220339) internal successors, (15836), 3776 states have internal predecessors, (15836), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3777 states to 3777 states and 15836 transitions. [2021-06-05 15:07:27,651 INFO L78 Accepts]: Start accepts. Automaton has 3777 states and 15836 transitions. Word has length 23 [2021-06-05 15:07:27,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:27,651 INFO L482 AbstractCegarLoop]: Abstraction has 3777 states and 15836 transitions. [2021-06-05 15:07:27,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:27,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3777 states and 15836 transitions. [2021-06-05 15:07:27,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:27,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:27,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:27,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable535 [2021-06-05 15:07:27,856 INFO L430 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:27,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:27,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1944197129, now seen corresponding path program 69 times [2021-06-05 15:07:27,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:27,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776727052] [2021-06-05 15:07:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:27,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:27,940 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:27,940 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:27,940 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776727052] [2021-06-05 15:07:27,941 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776727052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:27,941 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [801313182] [2021-06-05 15:07:27,941 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:27,965 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:27,965 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:27,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:27,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:28,059 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:28,059 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:28,060 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:28,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:28,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:28,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:28,130 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:28,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [801313182] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:28,130 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:28,130 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:28,130 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [965225706] [2021-06-05 15:07:28,130 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:28,130 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:28,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:28,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:28,131 INFO L87 Difference]: Start difference. First operand 3777 states and 15836 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:28,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:28,609 INFO L93 Difference]: Finished difference Result 4278 states and 17803 transitions. [2021-06-05 15:07:28,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:07:28,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:28,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:28,617 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 15:07:28,617 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 15:07:28,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 381.7ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:28,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 15:07:28,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3781. [2021-06-05 15:07:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3781 states, 3780 states have (on average 4.193650793650794) internal successors, (15852), 3780 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:28,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3781 states to 3781 states and 15852 transitions. [2021-06-05 15:07:28,669 INFO L78 Accepts]: Start accepts. Automaton has 3781 states and 15852 transitions. Word has length 23 [2021-06-05 15:07:28,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:28,669 INFO L482 AbstractCegarLoop]: Abstraction has 3781 states and 15852 transitions. [2021-06-05 15:07:28,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 18 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:28,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3781 states and 15852 transitions. [2021-06-05 15:07:28,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:28,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:28,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:28,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable537 [2021-06-05 15:07:28,875 INFO L430 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:28,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:28,875 INFO L82 PathProgramCache]: Analyzing trace with hash 403052635, now seen corresponding path program 98 times [2021-06-05 15:07:28,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:28,875 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193011983] [2021-06-05 15:07:28,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:28,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:28,964 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:28,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193011983] [2021-06-05 15:07:28,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1193011983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:28,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119456625] [2021-06-05 15:07:28,964 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 253 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:28,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:28,990 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:28,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:28,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:29,091 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:29,091 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:29,092 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:29,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:29,102 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:29,102 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:29,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:29,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1119456625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:29,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:29,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535047808] [2021-06-05 15:07:29,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:29,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:29,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:29,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:29,167 INFO L87 Difference]: Start difference. First operand 3781 states and 15852 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:29,545 INFO L93 Difference]: Finished difference Result 4001 states and 16695 transitions. [2021-06-05 15:07:29,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:07:29,545 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:29,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:29,553 INFO L225 Difference]: With dead ends: 4001 [2021-06-05 15:07:29,553 INFO L226 Difference]: Without dead ends: 3986 [2021-06-05 15:07:29,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 399.4ms TimeCoverageRelationStatistics Valid=119, Invalid=583, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:29,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3986 states. [2021-06-05 15:07:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3986 to 3787. [2021-06-05 15:07:29,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.194136291600634) internal successors, (15879), 3786 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15879 transitions. [2021-06-05 15:07:29,602 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15879 transitions. Word has length 23 [2021-06-05 15:07:29,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:29,602 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15879 transitions. [2021-06-05 15:07:29,602 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:29,602 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15879 transitions. [2021-06-05 15:07:29,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:29,607 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:29,607 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:29,807 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable539,253 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:29,807 INFO L430 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:29,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:29,808 INFO L82 PathProgramCache]: Analyzing trace with hash 268264731, now seen corresponding path program 99 times [2021-06-05 15:07:29,808 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:29,808 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [645676004] [2021-06-05 15:07:29,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:29,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:29,887 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:29,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:29,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [645676004] [2021-06-05 15:07:29,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [645676004] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:29,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198398215] [2021-06-05 15:07:29,887 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 254 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:29,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:29,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:29,913 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:29,913 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:30,037 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:07:30,037 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:07:30,041 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:30,060 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:07:30,061 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:30,061 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:07:30,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:30,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1198398215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:30,096 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:30,096 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:30,096 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1619672954] [2021-06-05 15:07:30,096 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:30,096 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:30,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:30,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:30,097 INFO L87 Difference]: Start difference. First operand 3787 states and 15879 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,553 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:30,553 INFO L93 Difference]: Finished difference Result 4188 states and 17441 transitions. [2021-06-05 15:07:30,554 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:30,554 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:30,554 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:30,561 INFO L225 Difference]: With dead ends: 4188 [2021-06-05 15:07:30,561 INFO L226 Difference]: Without dead ends: 4173 [2021-06-05 15:07:30,561 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=153, Invalid=969, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:30,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4173 states. [2021-06-05 15:07:30,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4173 to 3795. [2021-06-05 15:07:30,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.194254085397997) internal successors, (15913), 3794 states have internal predecessors, (15913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15913 transitions. [2021-06-05 15:07:30,610 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15913 transitions. Word has length 23 [2021-06-05 15:07:30,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:30,610 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15913 transitions. [2021-06-05 15:07:30,610 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:30,610 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15913 transitions. [2021-06-05 15:07:30,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:30,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:30,615 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:30,816 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable541,254 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:30,816 INFO L430 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:30,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:30,816 INFO L82 PathProgramCache]: Analyzing trace with hash 853598683, now seen corresponding path program 100 times [2021-06-05 15:07:30,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:30,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722886187] [2021-06-05 15:07:30,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:30,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:30,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:30,898 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:30,898 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722886187] [2021-06-05 15:07:30,898 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722886187] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:30,899 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399371924] [2021-06-05 15:07:30,899 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 255 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:30,923 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:30,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:30,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:30,924 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:31,003 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:31,004 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:31,005 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:31,012 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:31,013 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:31,013 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:31,091 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:31,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399371924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:31,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:31,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:31,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225339100] [2021-06-05 15:07:31,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:31,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:31,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:31,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:31,091 INFO L87 Difference]: Start difference. First operand 3795 states and 15913 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:31,723 INFO L93 Difference]: Finished difference Result 4042 states and 16845 transitions. [2021-06-05 15:07:31,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:31,724 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:31,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:31,731 INFO L225 Difference]: With dead ends: 4042 [2021-06-05 15:07:31,731 INFO L226 Difference]: Without dead ends: 4020 [2021-06-05 15:07:31,731 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 507.1ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:31,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4020 states. [2021-06-05 15:07:31,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4020 to 3799. [2021-06-05 15:07:31,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 4.194049499736703) internal successors, (15929), 3798 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 15929 transitions. [2021-06-05 15:07:31,801 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 15929 transitions. Word has length 23 [2021-06-05 15:07:31,801 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:31,801 INFO L482 AbstractCegarLoop]: Abstraction has 3799 states and 15929 transitions. [2021-06-05 15:07:31,801 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:31,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 15929 transitions. [2021-06-05 15:07:31,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:31,806 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:31,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:32,007 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 255 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable545 [2021-06-05 15:07:32,008 INFO L430 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:32,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:32,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1827801879, now seen corresponding path program 101 times [2021-06-05 15:07:32,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:32,008 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767203594] [2021-06-05 15:07:32,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:32,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:32,092 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:32,092 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767203594] [2021-06-05 15:07:32,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767203594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:32,092 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1824456330] [2021-06-05 15:07:32,092 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 256 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:32,123 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:32,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:32,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:32,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:32,203 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:32,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:32,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 15:07:32,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:32,218 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:32,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:32,219 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:29 [2021-06-05 15:07:32,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:32,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1824456330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:32,284 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:32,284 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:32,284 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261669769] [2021-06-05 15:07:32,284 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:32,284 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:32,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:32,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:32,284 INFO L87 Difference]: Start difference. First operand 3799 states and 15929 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:32,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:32,950 INFO L93 Difference]: Finished difference Result 4089 states and 17043 transitions. [2021-06-05 15:07:32,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:07:32,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:32,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:32,958 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 15:07:32,958 INFO L226 Difference]: Without dead ends: 4074 [2021-06-05 15:07:32,958 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 475.9ms TimeCoverageRelationStatistics Valid=166, Invalid=764, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:32,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4074 states. [2021-06-05 15:07:32,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4074 to 3791. [2021-06-05 15:07:33,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.193931398416886) internal successors, (15895), 3790 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:33,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15895 transitions. [2021-06-05 15:07:33,008 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15895 transitions. Word has length 23 [2021-06-05 15:07:33,008 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:33,008 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15895 transitions. [2021-06-05 15:07:33,008 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:33,008 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15895 transitions. [2021-06-05 15:07:33,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:33,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:33,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:33,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable547,256 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:33,215 INFO L430 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:33,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:33,215 INFO L82 PathProgramCache]: Analyzing trace with hash 422702249, now seen corresponding path program 102 times [2021-06-05 15:07:33,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:33,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38555083] [2021-06-05 15:07:33,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:33,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:33,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:33,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:33,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38555083] [2021-06-05 15:07:33,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38555083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:33,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1982778370] [2021-06-05 15:07:33,308 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 257 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:33,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:33,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:33,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:33,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:33,432 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:33,432 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:33,434 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:33,441 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:33,442 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:33,442 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:33,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:33,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1982778370] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:33,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:33,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:33,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [886914100] [2021-06-05 15:07:33,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:33,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:33,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:33,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:33,505 INFO L87 Difference]: Start difference. First operand 3791 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:33,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:33,964 INFO L93 Difference]: Finished difference Result 3985 states and 16631 transitions. [2021-06-05 15:07:33,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:07:33,964 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:33,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:33,971 INFO L225 Difference]: With dead ends: 3985 [2021-06-05 15:07:33,971 INFO L226 Difference]: Without dead ends: 3970 [2021-06-05 15:07:33,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 400.0ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:33,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3970 states. [2021-06-05 15:07:34,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3970 to 3783. [2021-06-05 15:07:34,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:34,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 15:07:34,020 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 15:07:34,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:34,020 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 15:07:34,020 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:34,020 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 15:07:34,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:34,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:34,025 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:34,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 257 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable548 [2021-06-05 15:07:34,227 INFO L430 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:34,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:34,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1086638551, now seen corresponding path program 103 times [2021-06-05 15:07:34,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:34,228 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300800500] [2021-06-05 15:07:34,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:34,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:34,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:34,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:34,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300800500] [2021-06-05 15:07:34,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1300800500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:34,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463226211] [2021-06-05 15:07:34,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 258 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:34,350 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:34,350 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:34,464 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:34,464 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:34,465 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:34,474 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:34,475 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:34,475 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:34,536 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:34,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463226211] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:34,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:34,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:34,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566521344] [2021-06-05 15:07:34,561 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:34,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:34,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:34,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:34,561 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:34,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:34,985 INFO L93 Difference]: Finished difference Result 4021 states and 16775 transitions. [2021-06-05 15:07:34,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:07:34,985 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:34,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:34,992 INFO L225 Difference]: With dead ends: 4021 [2021-06-05 15:07:34,992 INFO L226 Difference]: Without dead ends: 4006 [2021-06-05 15:07:34,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 103 ImplicationChecksByTransitivity, 404.3ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:34,995 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4006 states. [2021-06-05 15:07:35,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4006 to 3787. [2021-06-05 15:07:35,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.194136291600634) internal successors, (15879), 3786 states have internal predecessors, (15879), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:35,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15879 transitions. [2021-06-05 15:07:35,045 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15879 transitions. Word has length 23 [2021-06-05 15:07:35,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:35,045 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15879 transitions. [2021-06-05 15:07:35,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:35,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15879 transitions. [2021-06-05 15:07:35,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:35,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:35,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:35,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable550,258 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:35,251 INFO L430 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:35,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:35,251 INFO L82 PathProgramCache]: Analyzing trace with hash 664704283, now seen corresponding path program 104 times [2021-06-05 15:07:35,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:35,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813852601] [2021-06-05 15:07:35,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:35,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:35,331 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:35,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:35,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813852601] [2021-06-05 15:07:35,331 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813852601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:35,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557495223] [2021-06-05 15:07:35,331 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 259 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:35,355 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:35,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:35,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:35,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:35,451 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:35,451 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:35,452 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:35,460 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:35,461 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:35,461 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:35,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:35,519 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557495223] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:35,519 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:35,519 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:35,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867059531] [2021-06-05 15:07:35,520 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:35,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:35,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:35,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:35,520 INFO L87 Difference]: Start difference. First operand 3787 states and 15879 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:36,058 INFO L93 Difference]: Finished difference Result 4068 states and 16967 transitions. [2021-06-05 15:07:36,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:36,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:36,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:36,065 INFO L225 Difference]: With dead ends: 4068 [2021-06-05 15:07:36,065 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 15:07:36,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 385.0ms TimeCoverageRelationStatistics Valid=131, Invalid=625, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:36,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 15:07:36,103 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3795. [2021-06-05 15:07:36,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.194254085397997) internal successors, (15913), 3794 states have internal predecessors, (15913), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15913 transitions. [2021-06-05 15:07:36,115 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15913 transitions. Word has length 23 [2021-06-05 15:07:36,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:36,115 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15913 transitions. [2021-06-05 15:07:36,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:36,115 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15913 transitions. [2021-06-05 15:07:36,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:36,120 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:36,120 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:36,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 259 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable552 [2021-06-05 15:07:36,321 INFO L430 AbstractCegarLoop]: === Iteration 260 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:36,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:36,321 INFO L82 PathProgramCache]: Analyzing trace with hash -241456677, now seen corresponding path program 105 times [2021-06-05 15:07:36,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:36,321 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672107614] [2021-06-05 15:07:36,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:36,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:36,426 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:36,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:36,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672107614] [2021-06-05 15:07:36,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1672107614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:36,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [233344858] [2021-06-05 15:07:36,426 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 260 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:36,460 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:36,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:36,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:36,570 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:07:36,570 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:07:36,571 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:36,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:36,582 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:36,582 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 15:07:36,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:36,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [233344858] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:36,666 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:36,666 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:36,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179156166] [2021-06-05 15:07:36,666 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:36,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:36,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:36,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:36,666 INFO L87 Difference]: Start difference. First operand 3795 states and 15913 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:37,276 INFO L93 Difference]: Finished difference Result 4160 states and 17326 transitions. [2021-06-05 15:07:37,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:37,276 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:37,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:37,283 INFO L225 Difference]: With dead ends: 4160 [2021-06-05 15:07:37,283 INFO L226 Difference]: Without dead ends: 4139 [2021-06-05 15:07:37,284 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=173, Invalid=1017, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:07:37,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4139 states. [2021-06-05 15:07:37,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4139 to 3799. [2021-06-05 15:07:37,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3799 states, 3798 states have (on average 4.194049499736703) internal successors, (15929), 3798 states have internal predecessors, (15929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3799 states to 3799 states and 15929 transitions. [2021-06-05 15:07:37,334 INFO L78 Accepts]: Start accepts. Automaton has 3799 states and 15929 transitions. Word has length 23 [2021-06-05 15:07:37,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:37,334 INFO L482 AbstractCegarLoop]: Abstraction has 3799 states and 15929 transitions. [2021-06-05 15:07:37,334 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:37,334 INFO L276 IsEmpty]: Start isEmpty. Operand 3799 states and 15929 transitions. [2021-06-05 15:07:37,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:37,339 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:37,339 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:37,539 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 260 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable554 [2021-06-05 15:07:37,540 INFO L430 AbstractCegarLoop]: === Iteration 261 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:37,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:37,540 INFO L82 PathProgramCache]: Analyzing trace with hash 834254479, now seen corresponding path program 106 times [2021-06-05 15:07:37,540 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:37,540 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370927782] [2021-06-05 15:07:37,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:37,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:37,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:37,625 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370927782] [2021-06-05 15:07:37,625 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [370927782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,625 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1912687699] [2021-06-05 15:07:37,626 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 261 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:37,649 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:37,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:37,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:37,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:37,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:37,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:37,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,737 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:37,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:37,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:37,815 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:37,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1912687699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:37,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:37,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:37,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151421812] [2021-06-05 15:07:37,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:37,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:37,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:37,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:37,816 INFO L87 Difference]: Start difference. First operand 3799 states and 15929 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:38,384 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:38,384 INFO L93 Difference]: Finished difference Result 3994 states and 16671 transitions. [2021-06-05 15:07:38,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:38,385 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:38,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:38,391 INFO L225 Difference]: With dead ends: 3994 [2021-06-05 15:07:38,392 INFO L226 Difference]: Without dead ends: 3979 [2021-06-05 15:07:38,392 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 544.5ms TimeCoverageRelationStatistics Valid=159, Invalid=653, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:07:38,395 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3979 states. [2021-06-05 15:07:38,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3979 to 3791. [2021-06-05 15:07:38,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.193931398416886) internal successors, (15895), 3790 states have internal predecessors, (15895), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:38,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15895 transitions. [2021-06-05 15:07:38,441 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15895 transitions. Word has length 23 [2021-06-05 15:07:38,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:38,441 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15895 transitions. [2021-06-05 15:07:38,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:38,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15895 transitions. [2021-06-05 15:07:38,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:38,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:38,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:38,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 261 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable558 [2021-06-05 15:07:38,646 INFO L430 AbstractCegarLoop]: === Iteration 262 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:38,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:38,646 INFO L82 PathProgramCache]: Analyzing trace with hash -663993137, now seen corresponding path program 107 times [2021-06-05 15:07:38,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:38,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079300782] [2021-06-05 15:07:38,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:38,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:38,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:38,727 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:38,727 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079300782] [2021-06-05 15:07:38,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2079300782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:38,728 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028507357] [2021-06-05 15:07:38,728 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 262 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:38,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:07:38,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:38,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:38,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:38,852 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:38,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:38,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:38,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:38,861 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:38,861 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:38,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:38,921 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028507357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:38,921 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:38,921 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:38,921 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30940667] [2021-06-05 15:07:38,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:38,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:38,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:38,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:38,922 INFO L87 Difference]: Start difference. First operand 3791 states and 15895 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:39,298 INFO L93 Difference]: Finished difference Result 4023 states and 16783 transitions. [2021-06-05 15:07:39,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:07:39,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:39,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:39,305 INFO L225 Difference]: With dead ends: 4023 [2021-06-05 15:07:39,305 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 15:07:39,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 377.1ms TimeCoverageRelationStatistics Valid=117, Invalid=585, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:39,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 15:07:39,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3783. [2021-06-05 15:07:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 15:07:39,353 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 15:07:39,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:39,353 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 15:07:39,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:39,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 15:07:39,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:39,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:39,358 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:39,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable560,262 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:39,558 INFO L430 AbstractCegarLoop]: === Iteration 263 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:39,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:39,559 INFO L82 PathProgramCache]: Analyzing trace with hash -1209919013, now seen corresponding path program 108 times [2021-06-05 15:07:39,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:39,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [318106074] [2021-06-05 15:07:39,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:39,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:39,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:39,641 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:39,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [318106074] [2021-06-05 15:07:39,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [318106074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:39,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023457931] [2021-06-05 15:07:39,641 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 263 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:39,665 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:39,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:39,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:39,666 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:39,794 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:39,794 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:39,795 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:39,803 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:39,803 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:39,803 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:39,861 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:39,861 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023457931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:39,862 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:39,862 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:39,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165767856] [2021-06-05 15:07:39,862 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:39,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:39,862 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:39,862 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:39,862 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:40,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:40,383 INFO L93 Difference]: Finished difference Result 4048 states and 16879 transitions. [2021-06-05 15:07:40,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:40,383 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:40,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:40,390 INFO L225 Difference]: With dead ends: 4048 [2021-06-05 15:07:40,390 INFO L226 Difference]: Without dead ends: 4033 [2021-06-05 15:07:40,390 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 428.0ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:40,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4033 states. [2021-06-05 15:07:40,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4033 to 3791. [2021-06-05 15:07:40,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.1941952506596305) internal successors, (15896), 3790 states have internal predecessors, (15896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:40,439 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15896 transitions. [2021-06-05 15:07:40,439 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15896 transitions. Word has length 23 [2021-06-05 15:07:40,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:40,439 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15896 transitions. [2021-06-05 15:07:40,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:40,440 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15896 transitions. [2021-06-05 15:07:40,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:40,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:40,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:40,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 263 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable562 [2021-06-05 15:07:40,646 INFO L430 AbstractCegarLoop]: === Iteration 264 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:40,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:40,647 INFO L82 PathProgramCache]: Analyzing trace with hash -624585061, now seen corresponding path program 109 times [2021-06-05 15:07:40,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:40,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169090882] [2021-06-05 15:07:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:40,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:40,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:40,730 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:40,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169090882] [2021-06-05 15:07:40,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [169090882] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,730 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333457888] [2021-06-05 15:07:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 264 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:40,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:40,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:40,755 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:40,834 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:40,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,843 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:40,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:40,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:40,920 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:40,920 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333457888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:40,920 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:40,920 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:40,920 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006217981] [2021-06-05 15:07:40,920 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:40,920 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:40,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:40,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:40,921 INFO L87 Difference]: Start difference. First operand 3791 states and 15896 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:41,492 INFO L93 Difference]: Finished difference Result 3982 states and 16610 transitions. [2021-06-05 15:07:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:07:41,492 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:41,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:41,499 INFO L225 Difference]: With dead ends: 3982 [2021-06-05 15:07:41,499 INFO L226 Difference]: Without dead ends: 3960 [2021-06-05 15:07:41,499 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:07:41,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3960 states. [2021-06-05 15:07:41,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3960 to 3795. [2021-06-05 15:07:41,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.193990511333685) internal successors, (15912), 3794 states have internal predecessors, (15912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15912 transitions. [2021-06-05 15:07:41,547 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15912 transitions. Word has length 23 [2021-06-05 15:07:41,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:41,547 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15912 transitions. [2021-06-05 15:07:41,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:41,547 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15912 transitions. [2021-06-05 15:07:41,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:41,552 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:41,552 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:41,752 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 264 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable564 [2021-06-05 15:07:41,753 INFO L430 AbstractCegarLoop]: === Iteration 265 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:41,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:41,753 INFO L82 PathProgramCache]: Analyzing trace with hash 988981673, now seen corresponding path program 110 times [2021-06-05 15:07:41,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:41,753 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1041140876] [2021-06-05 15:07:41,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:41,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:41,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:41,845 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:41,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1041140876] [2021-06-05 15:07:41,845 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1041140876] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:41,845 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133565666] [2021-06-05 15:07:41,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 265 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:41,869 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:41,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:41,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:07:41,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:41,958 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:41,958 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 15:07:41,960 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:41,968 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:41,969 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:41,969 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 15:07:42,016 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:42,016 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2133565666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:42,017 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:42,017 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:07:42,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039551919] [2021-06-05 15:07:42,017 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:07:42,017 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:42,017 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:07:42,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:07:42,017 INFO L87 Difference]: Start difference. First operand 3795 states and 15912 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,426 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:42,426 INFO L93 Difference]: Finished difference Result 3968 states and 16563 transitions. [2021-06-05 15:07:42,427 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:07:42,427 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:42,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:42,433 INFO L225 Difference]: With dead ends: 3968 [2021-06-05 15:07:42,433 INFO L226 Difference]: Without dead ends: 3953 [2021-06-05 15:07:42,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 376.3ms TimeCoverageRelationStatistics Valid=114, Invalid=588, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:42,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3953 states. [2021-06-05 15:07:42,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3953 to 3787. [2021-06-05 15:07:42,474 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.193872160591654) internal successors, (15878), 3786 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15878 transitions. [2021-06-05 15:07:42,482 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15878 transitions. Word has length 23 [2021-06-05 15:07:42,482 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:42,482 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15878 transitions. [2021-06-05 15:07:42,482 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:42,482 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15878 transitions. [2021-06-05 15:07:42,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:42,487 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:42,487 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:42,687 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable566,265 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:42,688 INFO L430 AbstractCegarLoop]: === Iteration 266 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:42,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:42,688 INFO L82 PathProgramCache]: Analyzing trace with hash -1437140393, now seen corresponding path program 111 times [2021-06-05 15:07:42,688 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:42,688 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088943460] [2021-06-05 15:07:42,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:42,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:42,769 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:42,769 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:42,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088943460] [2021-06-05 15:07:42,769 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1088943460] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:42,769 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424148757] [2021-06-05 15:07:42,769 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 266 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:42,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:42,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:42,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:07:42,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:42,918 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:07:42,918 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:07:42,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:42,940 INFO L628 ElimStorePlain]: treesize reduction 55, result has 20.3 percent of original size [2021-06-05 15:07:42,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:42,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:07:42,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:42,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424148757] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:42,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:42,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:42,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743893508] [2021-06-05 15:07:42,977 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:42,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:42,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:42,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:42,978 INFO L87 Difference]: Start difference. First operand 3787 states and 15878 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:43,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:43,545 INFO L93 Difference]: Finished difference Result 4341 states and 18059 transitions. [2021-06-05 15:07:43,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:07:43,545 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:43,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:43,553 INFO L225 Difference]: With dead ends: 4341 [2021-06-05 15:07:43,553 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 15:07:43,553 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 419.7ms TimeCoverageRelationStatistics Valid=150, Invalid=972, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:07:43,557 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 15:07:43,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3791. [2021-06-05 15:07:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3791 states, 3790 states have (on average 4.1941952506596305) internal successors, (15896), 3790 states have internal predecessors, (15896), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:43,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3791 states to 3791 states and 15896 transitions. [2021-06-05 15:07:43,604 INFO L78 Accepts]: Start accepts. Automaton has 3791 states and 15896 transitions. Word has length 23 [2021-06-05 15:07:43,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:43,604 INFO L482 AbstractCegarLoop]: Abstraction has 3791 states and 15896 transitions. [2021-06-05 15:07:43,604 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:43,604 INFO L276 IsEmpty]: Start isEmpty. Operand 3791 states and 15896 transitions. [2021-06-05 15:07:43,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:43,609 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:43,609 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:43,809 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 266 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable569 [2021-06-05 15:07:43,809 INFO L430 AbstractCegarLoop]: === Iteration 267 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:43,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:43,809 INFO L82 PathProgramCache]: Analyzing trace with hash -923613541, now seen corresponding path program 112 times [2021-06-05 15:07:43,810 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:43,810 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29986703] [2021-06-05 15:07:43,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:43,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:43,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:43,896 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29986703] [2021-06-05 15:07:43,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29986703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:43,896 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1034121767] [2021-06-05 15:07:43,896 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 267 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:43,921 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:43,922 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:43,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:44,000 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:44,001 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:44,002 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:44,009 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:44,010 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:44,010 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:44,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:44,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1034121767] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:44,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:44,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:44,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577980680] [2021-06-05 15:07:44,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:44,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:44,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:44,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:44,090 INFO L87 Difference]: Start difference. First operand 3791 states and 15896 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:44,679 INFO L93 Difference]: Finished difference Result 4028 states and 16799 transitions. [2021-06-05 15:07:44,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:07:44,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:44,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:44,686 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 15:07:44,686 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 15:07:44,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 566.7ms TimeCoverageRelationStatistics Valid=190, Invalid=802, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:07:44,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 15:07:44,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3795. [2021-06-05 15:07:44,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.193990511333685) internal successors, (15912), 3794 states have internal predecessors, (15912), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15912 transitions. [2021-06-05 15:07:44,735 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15912 transitions. Word has length 23 [2021-06-05 15:07:44,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:44,735 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15912 transitions. [2021-06-05 15:07:44,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:44,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15912 transitions. [2021-06-05 15:07:44,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:44,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:44,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:44,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 267 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable573 [2021-06-05 15:07:44,940 INFO L430 AbstractCegarLoop]: === Iteration 268 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:44,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:44,940 INFO L82 PathProgramCache]: Analyzing trace with hash 152097615, now seen corresponding path program 113 times [2021-06-05 15:07:44,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:44,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [965889371] [2021-06-05 15:07:44,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:44,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:45,050 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:45,050 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:45,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [965889371] [2021-06-05 15:07:45,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [965889371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:45,050 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1245475264] [2021-06-05 15:07:45,050 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 268 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:45,075 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:45,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:45,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:45,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:45,155 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:45,156 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:45,157 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:45,164 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:45,165 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:45,165 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:45,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:45,242 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1245475264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:45,242 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:45,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:45,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1116359091] [2021-06-05 15:07:45,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:45,243 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:45,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:45,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:45,243 INFO L87 Difference]: Start difference. First operand 3795 states and 15912 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:45,896 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:45,897 INFO L93 Difference]: Finished difference Result 4007 states and 16723 transitions. [2021-06-05 15:07:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:07:45,897 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:45,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:45,904 INFO L225 Difference]: With dead ends: 4007 [2021-06-05 15:07:45,904 INFO L226 Difference]: Without dead ends: 3992 [2021-06-05 15:07:45,904 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:45,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-06-05 15:07:45,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3787. [2021-06-05 15:07:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3787 states, 3786 states have (on average 4.193872160591654) internal successors, (15878), 3786 states have internal predecessors, (15878), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:45,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3787 states to 3787 states and 15878 transitions. [2021-06-05 15:07:45,953 INFO L78 Accepts]: Start accepts. Automaton has 3787 states and 15878 transitions. Word has length 23 [2021-06-05 15:07:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:45,953 INFO L482 AbstractCegarLoop]: Abstraction has 3787 states and 15878 transitions. [2021-06-05 15:07:45,953 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 3787 states and 15878 transitions. [2021-06-05 15:07:45,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:45,958 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:45,958 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:46,159 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 268 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable575 [2021-06-05 15:07:46,159 INFO L430 AbstractCegarLoop]: === Iteration 269 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:46,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:46,159 INFO L82 PathProgramCache]: Analyzing trace with hash 433093467, now seen corresponding path program 114 times [2021-06-05 15:07:46,159 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:46,159 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321634106] [2021-06-05 15:07:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:46,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:46,249 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:46,249 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321634106] [2021-06-05 15:07:46,249 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321634106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:46,249 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870120703] [2021-06-05 15:07:46,249 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 269 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:46,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:07:46,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:07:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:46,344 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:07:46,344 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:07:46,351 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:46,351 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 35 [2021-06-05 15:07:46,352 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:46,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:46,363 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:46,363 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:32 [2021-06-05 15:07:46,455 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:46,455 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870120703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:46,455 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:46,455 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:46,455 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54917723] [2021-06-05 15:07:46,455 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:46,455 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:46,455 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:46,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:46,456 INFO L87 Difference]: Start difference. First operand 3787 states and 15878 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,839 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:46,839 INFO L93 Difference]: Finished difference Result 3993 states and 16666 transitions. [2021-06-05 15:07:46,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:07:46,839 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:46,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:46,846 INFO L225 Difference]: With dead ends: 3993 [2021-06-05 15:07:46,846 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 15:07:46,846 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 405.2ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:07:46,849 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 15:07:46,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3796. [2021-06-05 15:07:46,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.19235836627141) internal successors, (15910), 3795 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15910 transitions. [2021-06-05 15:07:46,894 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15910 transitions. Word has length 23 [2021-06-05 15:07:46,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:46,894 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15910 transitions. [2021-06-05 15:07:46,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:46,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15910 transitions. [2021-06-05 15:07:46,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:46,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:46,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:47,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 269 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable577 [2021-06-05 15:07:47,100 INFO L430 AbstractCegarLoop]: === Iteration 270 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:47,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:47,100 INFO L82 PathProgramCache]: Analyzing trace with hash -608482601, now seen corresponding path program 115 times [2021-06-05 15:07:47,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:47,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757088514] [2021-06-05 15:07:47,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:47,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:47,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:47,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:47,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757088514] [2021-06-05 15:07:47,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757088514] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:47,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511742966] [2021-06-05 15:07:47,191 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 270 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:47,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:47,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:47,216 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:47,286 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:47,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:47,289 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:47,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:47,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:47,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:07:47,399 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:47,400 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [511742966] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:47,400 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:47,400 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:47,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139884407] [2021-06-05 15:07:47,400 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:47,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:47,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:47,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:47,400 INFO L87 Difference]: Start difference. First operand 3796 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:47,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:47,868 INFO L93 Difference]: Finished difference Result 4008 states and 16725 transitions. [2021-06-05 15:07:47,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:07:47,869 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:47,869 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:47,875 INFO L225 Difference]: With dead ends: 4008 [2021-06-05 15:07:47,876 INFO L226 Difference]: Without dead ends: 3984 [2021-06-05 15:07:47,876 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 469.0ms TimeCoverageRelationStatistics Valid=135, Invalid=567, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:07:47,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3984 states. [2021-06-05 15:07:47,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3984 to 3789. [2021-06-05 15:07:47,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.193769799366421) internal successors, (15886), 3788 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15886 transitions. [2021-06-05 15:07:47,924 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15886 transitions. Word has length 23 [2021-06-05 15:07:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:47,924 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15886 transitions. [2021-06-05 15:07:47,925 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15886 transitions. [2021-06-05 15:07:47,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:47,929 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:47,930 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:48,130 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable578,270 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:48,130 INFO L430 AbstractCegarLoop]: === Iteration 271 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:48,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:48,130 INFO L82 PathProgramCache]: Analyzing trace with hash -895603953, now seen corresponding path program 116 times [2021-06-05 15:07:48,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:48,130 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243270129] [2021-06-05 15:07:48,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:48,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:48,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:48,219 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:48,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243270129] [2021-06-05 15:07:48,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [243270129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:48,219 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462543228] [2021-06-05 15:07:48,219 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 271 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:48,244 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:48,244 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:48,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:48,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:48,313 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:48,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:48,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:48,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:48,324 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:48,324 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:07:48,423 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:48,423 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1462543228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:48,423 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:48,423 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:48,423 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1540818633] [2021-06-05 15:07:48,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:48,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:48,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:48,424 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:48,424 INFO L87 Difference]: Start difference. First operand 3789 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:49,007 INFO L93 Difference]: Finished difference Result 3948 states and 16476 transitions. [2021-06-05 15:07:49,007 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:07:49,007 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:49,007 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:49,014 INFO L225 Difference]: With dead ends: 3948 [2021-06-05 15:07:49,014 INFO L226 Difference]: Without dead ends: 3926 [2021-06-05 15:07:49,015 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 506.5ms TimeCoverageRelationStatistics Valid=183, Invalid=747, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:07:49,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3926 states. [2021-06-05 15:07:49,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3926 to 3793. [2021-06-05 15:07:49,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193565400843882) internal successors, (15902), 3792 states have internal predecessors, (15902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15902 transitions. [2021-06-05 15:07:49,066 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15902 transitions. Word has length 23 [2021-06-05 15:07:49,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:49,066 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15902 transitions. [2021-06-05 15:07:49,066 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:49,066 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15902 transitions. [2021-06-05 15:07:49,071 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:49,071 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:49,071 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:49,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable580,271 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:49,272 INFO L430 AbstractCegarLoop]: === Iteration 272 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:49,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:49,272 INFO L82 PathProgramCache]: Analyzing trace with hash -1388821339, now seen corresponding path program 117 times [2021-06-05 15:07:49,272 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:49,272 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304807724] [2021-06-05 15:07:49,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:49,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:49,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:49,362 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:49,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304807724] [2021-06-05 15:07:49,362 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304807724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:49,362 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [198816237] [2021-06-05 15:07:49,362 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 272 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:49,387 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:07:49,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:49,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 26 conjunts are in the unsatisfiable core [2021-06-05 15:07:49,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:49,497 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 15:07:49,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 25 treesize of output 59 [2021-06-05 15:07:49,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:49,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:49,531 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:49,531 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:351 [2021-06-05 15:07:49,760 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:49,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [198816237] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:49,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:49,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:49,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210489923] [2021-06-05 15:07:49,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:49,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:49,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:49,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:49,760 INFO L87 Difference]: Start difference. First operand 3793 states and 15902 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:50,210 WARN L205 SmtUtils]: Spent 106.00 ms on a formula simplification. DAG size of input: 79 DAG size of output: 51 [2021-06-05 15:07:50,489 WARN L205 SmtUtils]: Spent 129.00 ms on a formula simplification. DAG size of input: 69 DAG size of output: 51 [2021-06-05 15:07:51,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:51,089 INFO L93 Difference]: Finished difference Result 4313 states and 17944 transitions. [2021-06-05 15:07:51,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:07:51,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:51,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:51,096 INFO L225 Difference]: With dead ends: 4313 [2021-06-05 15:07:51,096 INFO L226 Difference]: Without dead ends: 4298 [2021-06-05 15:07:51,097 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 288 ImplicationChecksByTransitivity, 1249.3ms TimeCoverageRelationStatistics Valid=269, Invalid=1291, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:07:51,100 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-06-05 15:07:51,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3789. [2021-06-05 15:07:51,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.193769799366421) internal successors, (15886), 3788 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15886 transitions. [2021-06-05 15:07:51,147 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15886 transitions. Word has length 23 [2021-06-05 15:07:51,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:51,147 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15886 transitions. [2021-06-05 15:07:51,147 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:51,147 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15886 transitions. [2021-06-05 15:07:51,152 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:51,152 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:51,152 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:51,352 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable582,272 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:51,352 INFO L430 AbstractCegarLoop]: === Iteration 273 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:51,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:51,353 INFO L82 PathProgramCache]: Analyzing trace with hash -454045083, now seen corresponding path program 118 times [2021-06-05 15:07:51,353 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:51,353 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195227996] [2021-06-05 15:07:51,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:51,354 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:51,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:51,445 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195227996] [2021-06-05 15:07:51,445 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [195227996] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:51,445 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1329268006] [2021-06-05 15:07:51,445 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 273 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:51,469 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:51,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:51,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:51,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:51,540 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:51,540 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:51,541 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:51,549 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:51,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:51,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:07:51,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:51,672 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1329268006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:51,672 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:51,672 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:51,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [81731471] [2021-06-05 15:07:51,672 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:51,672 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:51,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:51,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:51,672 INFO L87 Difference]: Start difference. First operand 3789 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:52,240 INFO L93 Difference]: Finished difference Result 3962 states and 16538 transitions. [2021-06-05 15:07:52,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:07:52,240 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:52,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:52,247 INFO L225 Difference]: With dead ends: 3962 [2021-06-05 15:07:52,247 INFO L226 Difference]: Without dead ends: 3941 [2021-06-05 15:07:52,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 571.3ms TimeCoverageRelationStatistics Valid=166, Invalid=704, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:07:52,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3941 states. [2021-06-05 15:07:52,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3941 to 3793. [2021-06-05 15:07:52,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193565400843882) internal successors, (15902), 3792 states have internal predecessors, (15902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15902 transitions. [2021-06-05 15:07:52,298 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15902 transitions. Word has length 23 [2021-06-05 15:07:52,298 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:52,298 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15902 transitions. [2021-06-05 15:07:52,298 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:52,298 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15902 transitions. [2021-06-05 15:07:52,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:52,303 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:52,303 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:52,504 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable592,273 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:52,504 INFO L430 AbstractCegarLoop]: === Iteration 274 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:52,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:52,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1466737615, now seen corresponding path program 119 times [2021-06-05 15:07:52,504 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:52,504 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1014734338] [2021-06-05 15:07:52,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:52,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:52,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:52,598 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1014734338] [2021-06-05 15:07:52,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1014734338] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:52,598 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1615860300] [2021-06-05 15:07:52,599 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 274 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:52,623 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:07:52,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:52,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:52,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:52,693 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:52,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:52,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:52,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:52,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:52,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:07:52,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:52,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1615860300] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:52,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:52,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:52,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480379260] [2021-06-05 15:07:52,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:52,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:52,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:52,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:52,828 INFO L87 Difference]: Start difference. First operand 3793 states and 15902 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:53,449 INFO L93 Difference]: Finished difference Result 3954 states and 16513 transitions. [2021-06-05 15:07:53,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:53,449 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:53,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:53,456 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 15:07:53,456 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 15:07:53,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 596.1ms TimeCoverageRelationStatistics Valid=163, Invalid=707, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:07:53,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 15:07:53,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3785. [2021-06-05 15:07:53,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 4.193710359408033) internal successors, (15869), 3784 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 15869 transitions. [2021-06-05 15:07:53,504 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 15869 transitions. Word has length 23 [2021-06-05 15:07:53,504 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:53,504 INFO L482 AbstractCegarLoop]: Abstraction has 3785 states and 15869 transitions. [2021-06-05 15:07:53,504 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:53,504 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 15869 transitions. [2021-06-05 15:07:53,509 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:53,509 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:53,509 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:53,710 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable594,274 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:53,710 INFO L430 AbstractCegarLoop]: === Iteration 275 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:53,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:53,710 INFO L82 PathProgramCache]: Analyzing trace with hash 1812114575, now seen corresponding path program 120 times [2021-06-05 15:07:53,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:53,710 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821458520] [2021-06-05 15:07:53,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:53,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:53,793 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:53,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:53,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821458520] [2021-06-05 15:07:53,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [821458520] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:53,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720431801] [2021-06-05 15:07:53,794 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 275 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:53,818 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:07:53,818 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:53,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:53,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:53,912 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:53,912 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:53,913 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:53,921 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:53,921 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:53,921 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:53,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:53,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720431801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:53,980 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:53,980 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:53,980 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028410554] [2021-06-05 15:07:53,980 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:53,980 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:53,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:53,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:53,980 INFO L87 Difference]: Start difference. First operand 3785 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:54,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:54,521 INFO L93 Difference]: Finished difference Result 4034 states and 16823 transitions. [2021-06-05 15:07:54,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:54,521 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:54,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:54,528 INFO L225 Difference]: With dead ends: 4034 [2021-06-05 15:07:54,528 INFO L226 Difference]: Without dead ends: 4019 [2021-06-05 15:07:54,528 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=130, Invalid=626, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:54,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4019 states. [2021-06-05 15:07:54,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4019 to 3793. [2021-06-05 15:07:54,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193829113924051) internal successors, (15903), 3792 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:54,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15903 transitions. [2021-06-05 15:07:54,577 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15903 transitions. Word has length 23 [2021-06-05 15:07:54,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:54,577 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15903 transitions. [2021-06-05 15:07:54,577 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:54,577 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15903 transitions. [2021-06-05 15:07:54,582 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:54,582 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:54,582 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:54,782 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 275 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable596 [2021-06-05 15:07:54,783 INFO L430 AbstractCegarLoop]: === Iteration 276 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:54,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:54,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1897518769, now seen corresponding path program 121 times [2021-06-05 15:07:54,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:54,783 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468038082] [2021-06-05 15:07:54,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:54,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:54,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:54,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:54,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468038082] [2021-06-05 15:07:54,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468038082] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:54,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080325856] [2021-06-05 15:07:54,872 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 276 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:54,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:54,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:54,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:54,977 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:54,977 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:54,978 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:54,986 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:54,987 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:54,987 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:55,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:55,064 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080325856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:55,064 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:55,064 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:55,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577353729] [2021-06-05 15:07:55,065 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:55,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:55,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:55,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:55,065 INFO L87 Difference]: Start difference. First operand 3793 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:55,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:55,679 INFO L93 Difference]: Finished difference Result 3979 states and 16600 transitions. [2021-06-05 15:07:55,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:07:55,680 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:55,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:55,687 INFO L225 Difference]: With dead ends: 3979 [2021-06-05 15:07:55,687 INFO L226 Difference]: Without dead ends: 3957 [2021-06-05 15:07:55,687 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:07:55,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3957 states. [2021-06-05 15:07:55,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3957 to 3797. [2021-06-05 15:07:55,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 4.193624868282402) internal successors, (15919), 3796 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:55,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 15919 transitions. [2021-06-05 15:07:55,735 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 15919 transitions. Word has length 23 [2021-06-05 15:07:55,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:55,735 INFO L482 AbstractCegarLoop]: Abstraction has 3797 states and 15919 transitions. [2021-06-05 15:07:55,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:55,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 15919 transitions. [2021-06-05 15:07:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:55,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:55,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:55,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 276 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable598 [2021-06-05 15:07:55,940 INFO L430 AbstractCegarLoop]: === Iteration 277 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:55,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:55,940 INFO L82 PathProgramCache]: Analyzing trace with hash -283952035, now seen corresponding path program 122 times [2021-06-05 15:07:55,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:55,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024150741] [2021-06-05 15:07:55,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:55,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:56,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024150741] [2021-06-05 15:07:56,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024150741] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219520441] [2021-06-05 15:07:56,024 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 277 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:56,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:56,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:56,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:07:56,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:56,137 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:56,137 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 15:07:56,139 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:56,147 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:56,148 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:56,148 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 15:07:56,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219520441] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:56,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:07:56,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905093415] [2021-06-05 15:07:56,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:07:56,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:56,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:07:56,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=253, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:07:56,195 INFO L87 Difference]: Start difference. First operand 3797 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:56,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:56,560 INFO L93 Difference]: Finished difference Result 3954 states and 16507 transitions. [2021-06-05 15:07:56,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:07:56,561 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:56,561 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:56,567 INFO L225 Difference]: With dead ends: 3954 [2021-06-05 15:07:56,567 INFO L226 Difference]: Without dead ends: 3939 [2021-06-05 15:07:56,568 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 331.0ms TimeCoverageRelationStatistics Valid=111, Invalid=539, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:07:56,571 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3939 states. [2021-06-05 15:07:56,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3939 to 3789. [2021-06-05 15:07:56,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.19350580781415) internal successors, (15885), 3788 states have internal predecessors, (15885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:56,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15885 transitions. [2021-06-05 15:07:56,616 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15885 transitions. Word has length 23 [2021-06-05 15:07:56,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:56,616 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15885 transitions. [2021-06-05 15:07:56,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:56,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15885 transitions. [2021-06-05 15:07:56,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:56,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:56,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:56,822 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 277 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable600 [2021-06-05 15:07:56,822 INFO L430 AbstractCegarLoop]: === Iteration 278 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:56,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:56,822 INFO L82 PathProgramCache]: Analyzing trace with hash 276609189, now seen corresponding path program 123 times [2021-06-05 15:07:56,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:56,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532812625] [2021-06-05 15:07:56,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:56,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:56,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:56,904 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:56,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532812625] [2021-06-05 15:07:56,904 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532812625] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:56,904 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332347798] [2021-06-05 15:07:56,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 278 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:56,936 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:07:56,936 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:56,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:07:56,937 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:57,080 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:07:57,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:07:57,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:07:57,106 INFO L628 ElimStorePlain]: treesize reduction 70, result has 19.5 percent of original size [2021-06-05 15:07:57,106 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:57,106 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 15:07:57,147 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:57,147 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332347798] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:57,147 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:57,147 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:07:57,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1020155211] [2021-06-05 15:07:57,148 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:07:57,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:57,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:07:57,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:07:57,148 INFO L87 Difference]: Start difference. First operand 3789 states and 15885 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:57,762 INFO L93 Difference]: Finished difference Result 4225 states and 17591 transitions. [2021-06-05 15:07:57,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:07:57,762 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:57,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:57,770 INFO L225 Difference]: With dead ends: 4225 [2021-06-05 15:07:57,770 INFO L226 Difference]: Without dead ends: 4210 [2021-06-05 15:07:57,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 430.9ms TimeCoverageRelationStatistics Valid=137, Invalid=855, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:07:57,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4210 states. [2021-06-05 15:07:57,809 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4210 to 3785. [2021-06-05 15:07:57,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3785 states, 3784 states have (on average 4.193710359408033) internal successors, (15869), 3784 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3785 states to 3785 states and 15869 transitions. [2021-06-05 15:07:57,820 INFO L78 Accepts]: Start accepts. Automaton has 3785 states and 15869 transitions. Word has length 23 [2021-06-05 15:07:57,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:57,820 INFO L482 AbstractCegarLoop]: Abstraction has 3785 states and 15869 transitions. [2021-06-05 15:07:57,820 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:57,820 INFO L276 IsEmpty]: Start isEmpty. Operand 3785 states and 15869 transitions. [2021-06-05 15:07:57,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:57,825 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:57,825 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:58,025 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 278 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable603 [2021-06-05 15:07:58,026 INFO L430 AbstractCegarLoop]: === Iteration 279 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:58,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:58,026 INFO L82 PathProgramCache]: Analyzing trace with hash 948426341, now seen corresponding path program 124 times [2021-06-05 15:07:58,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:58,026 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757424931] [2021-06-05 15:07:58,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:58,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:58,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,130 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757424931] [2021-06-05 15:07:58,130 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1757424931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,130 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052119269] [2021-06-05 15:07:58,130 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 279 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:58,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:07:58,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:58,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:58,249 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:58,250 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:07:58,251 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:58,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:58,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:07:58,317 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:58,318 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052119269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:58,318 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:58,318 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:58,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223901368] [2021-06-05 15:07:58,318 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:58,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:58,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:58,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:58,318 INFO L87 Difference]: Start difference. First operand 3785 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:07:58,902 INFO L93 Difference]: Finished difference Result 4061 states and 16939 transitions. [2021-06-05 15:07:58,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:07:58,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:07:58,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:07:58,910 INFO L225 Difference]: With dead ends: 4061 [2021-06-05 15:07:58,910 INFO L226 Difference]: Without dead ends: 4046 [2021-06-05 15:07:58,910 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 410.8ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:07:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4046 states. [2021-06-05 15:07:58,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4046 to 3793. [2021-06-05 15:07:58,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3793 states, 3792 states have (on average 4.193829113924051) internal successors, (15903), 3792 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3793 states to 3793 states and 15903 transitions. [2021-06-05 15:07:58,958 INFO L78 Accepts]: Start accepts. Automaton has 3793 states and 15903 transitions. Word has length 23 [2021-06-05 15:07:58,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:07:58,959 INFO L482 AbstractCegarLoop]: Abstraction has 3793 states and 15903 transitions. [2021-06-05 15:07:58,959 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:07:58,959 INFO L276 IsEmpty]: Start isEmpty. Operand 3793 states and 15903 transitions. [2021-06-05 15:07:58,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:07:58,964 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:07:58,964 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:07:59,164 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable607,279 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:59,164 INFO L430 AbstractCegarLoop]: === Iteration 280 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:07:59,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:07:59,164 INFO L82 PathProgramCache]: Analyzing trace with hash 1461953193, now seen corresponding path program 125 times [2021-06-05 15:07:59,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:07:59,165 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142511703] [2021-06-05 15:07:59,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:07:59,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:07:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:59,250 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:07:59,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142511703] [2021-06-05 15:07:59,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1142511703] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:59,250 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2082927894] [2021-06-05 15:07:59,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 280 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:07:59,274 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:07:59,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:07:59,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:07:59,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:07:59,353 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:59,353 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:07:59,354 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:07:59,362 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:07:59,362 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:07:59,362 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:07:59,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:07:59,439 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2082927894] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:07:59,439 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:07:59,439 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:07:59,439 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1168091690] [2021-06-05 15:07:59,439 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:07:59,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:07:59,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:07:59,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:07:59,439 INFO L87 Difference]: Start difference. First operand 3793 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:00,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:00,082 INFO L93 Difference]: Finished difference Result 4020 states and 16767 transitions. [2021-06-05 15:08:00,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:08:00,082 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:00,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:00,089 INFO L225 Difference]: With dead ends: 4020 [2021-06-05 15:08:00,089 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 15:08:00,089 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 602.5ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:08:00,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 15:08:00,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3797. [2021-06-05 15:08:00,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3797 states, 3796 states have (on average 4.193624868282402) internal successors, (15919), 3796 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:00,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3797 states to 3797 states and 15919 transitions. [2021-06-05 15:08:00,138 INFO L78 Accepts]: Start accepts. Automaton has 3797 states and 15919 transitions. Word has length 23 [2021-06-05 15:08:00,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:00,138 INFO L482 AbstractCegarLoop]: Abstraction has 3797 states and 15919 transitions. [2021-06-05 15:08:00,138 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:00,138 INFO L276 IsEmpty]: Start isEmpty. Operand 3797 states and 15919 transitions. [2021-06-05 15:08:00,143 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:00,143 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:00,143 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:00,343 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable609,280 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:00,344 INFO L430 AbstractCegarLoop]: === Iteration 281 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:00,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:00,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1757302947, now seen corresponding path program 126 times [2021-06-05 15:08:00,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:00,344 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128066474] [2021-06-05 15:08:00,344 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:00,355 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:00,449 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:00,449 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:00,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128066474] [2021-06-05 15:08:00,449 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128066474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:00,449 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941884040] [2021-06-05 15:08:00,449 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 281 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:00,474 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:08:00,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:00,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:08:00,475 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:00,577 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:00,577 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 15:08:00,579 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:00,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:00,591 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:00,591 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 15:08:00,628 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:00,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [941884040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:00,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:00,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:08:00,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023543896] [2021-06-05 15:08:00,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:08:00,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:00,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:08:00,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:08:00,629 INFO L87 Difference]: Start difference. First operand 3797 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,074 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:01,074 INFO L93 Difference]: Finished difference Result 4018 states and 16766 transitions. [2021-06-05 15:08:01,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:08:01,075 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:01,075 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:01,081 INFO L225 Difference]: With dead ends: 4018 [2021-06-05 15:08:01,081 INFO L226 Difference]: Without dead ends: 4003 [2021-06-05 15:08:01,082 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 368.1ms TimeCoverageRelationStatistics Valid=136, Invalid=566, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:01,085 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4003 states. [2021-06-05 15:08:01,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4003 to 3789. [2021-06-05 15:08:01,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3789 states, 3788 states have (on average 4.19350580781415) internal successors, (15885), 3788 states have internal predecessors, (15885), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3789 states to 3789 states and 15885 transitions. [2021-06-05 15:08:01,130 INFO L78 Accepts]: Start accepts. Automaton has 3789 states and 15885 transitions. Word has length 23 [2021-06-05 15:08:01,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:01,130 INFO L482 AbstractCegarLoop]: Abstraction has 3789 states and 15885 transitions. [2021-06-05 15:08:01,130 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:01,130 INFO L276 IsEmpty]: Start isEmpty. Operand 3789 states and 15885 transitions. [2021-06-05 15:08:01,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:01,135 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:01,135 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:01,335 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 281 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable611 [2021-06-05 15:08:01,335 INFO L430 AbstractCegarLoop]: === Iteration 282 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:01,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:01,335 INFO L82 PathProgramCache]: Analyzing trace with hash -1586488015, now seen corresponding path program 127 times [2021-06-05 15:08:01,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:01,336 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802671392] [2021-06-05 15:08:01,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:01,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:01,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:01,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802671392] [2021-06-05 15:08:01,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802671392] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582414841] [2021-06-05 15:08:01,416 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 282 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:01,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:01,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:01,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:01,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:01,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,550 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:01,550 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:01,550 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:01,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:01,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582414841] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:01,609 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:01,609 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:01,609 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [383217496] [2021-06-05 15:08:01,609 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:01,609 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:01,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:01,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:01,610 INFO L87 Difference]: Start difference. First operand 3789 states and 15885 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:02,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:02,061 INFO L93 Difference]: Finished difference Result 4020 states and 16771 transitions. [2021-06-05 15:08:02,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:08:02,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:02,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:02,068 INFO L225 Difference]: With dead ends: 4020 [2021-06-05 15:08:02,068 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 15:08:02,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 377.0ms TimeCoverageRelationStatistics Valid=121, Invalid=581, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:02,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 15:08:02,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3783. [2021-06-05 15:08:02,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3783 states, 3782 states have (on average 4.193812797461661) internal successors, (15861), 3782 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:02,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3783 states to 3783 states and 15861 transitions. [2021-06-05 15:08:02,117 INFO L78 Accepts]: Start accepts. Automaton has 3783 states and 15861 transitions. Word has length 23 [2021-06-05 15:08:02,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:02,117 INFO L482 AbstractCegarLoop]: Abstraction has 3783 states and 15861 transitions. [2021-06-05 15:08:02,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:02,117 INFO L276 IsEmpty]: Start isEmpty. Operand 3783 states and 15861 transitions. [2021-06-05 15:08:02,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:02,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:02,122 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:02,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable614,282 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:02,322 INFO L430 AbstractCegarLoop]: === Iteration 283 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:02,322 INFO L82 PathProgramCache]: Analyzing trace with hash 1604229199, now seen corresponding path program 128 times [2021-06-05 15:08:02,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:02,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1618342154] [2021-06-05 15:08:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:02,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:02,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:02,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1618342154] [2021-06-05 15:08:02,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1618342154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:02,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691609850] [2021-06-05 15:08:02,417 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 283 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:02,441 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:02,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:02,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:02,442 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:02,539 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:02,539 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:02,540 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:02,547 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:02,548 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:02,548 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:02,608 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:02,608 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691609850] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:02,608 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:02,608 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:02,608 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64007536] [2021-06-05 15:08:02,608 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:02,608 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:02,609 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:02,609 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:02,609 INFO L87 Difference]: Start difference. First operand 3783 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:03,169 INFO L93 Difference]: Finished difference Result 4101 states and 17095 transitions. [2021-06-05 15:08:03,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:08:03,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:03,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:03,177 INFO L225 Difference]: With dead ends: 4101 [2021-06-05 15:08:03,177 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 15:08:03,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 455.7ms TimeCoverageRelationStatistics Valid=139, Invalid=673, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:08:03,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 15:08:03,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3788. [2021-06-05 15:08:03,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193556905202007) internal successors, (15881), 3787 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15881 transitions. [2021-06-05 15:08:03,248 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15881 transitions. Word has length 23 [2021-06-05 15:08:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:03,248 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15881 transitions. [2021-06-05 15:08:03,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:03,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15881 transitions. [2021-06-05 15:08:03,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:03,258 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:03,258 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:03,471 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 283 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable616 [2021-06-05 15:08:03,472 INFO L430 AbstractCegarLoop]: === Iteration 284 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:03,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:03,472 INFO L82 PathProgramCache]: Analyzing trace with hash 1182294931, now seen corresponding path program 129 times [2021-06-05 15:08:03,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:03,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26250886] [2021-06-05 15:08:03,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:03,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:03,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:03,562 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:03,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26250886] [2021-06-05 15:08:03,562 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26250886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:03,562 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946763294] [2021-06-05 15:08:03,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 284 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:03,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:03,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:03,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:08:03,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:03,708 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:08:03,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:08:03,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:03,728 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:08:03,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:03,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:08:03,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:03,767 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946763294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:03,767 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:03,767 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:08:03,767 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188261668] [2021-06-05 15:08:03,767 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:03,767 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:03,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:03,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:03,767 INFO L87 Difference]: Start difference. First operand 3788 states and 15881 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:04,433 INFO L93 Difference]: Finished difference Result 4353 states and 18101 transitions. [2021-06-05 15:08:04,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:08:04,433 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:04,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:04,441 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 15:08:04,441 INFO L226 Difference]: Without dead ends: 4338 [2021-06-05 15:08:04,441 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 468.0ms TimeCoverageRelationStatistics Valid=162, Invalid=1098, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:08:04,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4338 states. [2021-06-05 15:08:04,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4338 to 3796. [2021-06-05 15:08:04,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.1936758893280635) internal successors, (15915), 3795 states have internal predecessors, (15915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15915 transitions. [2021-06-05 15:08:04,493 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15915 transitions. Word has length 23 [2021-06-05 15:08:04,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:04,494 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15915 transitions. [2021-06-05 15:08:04,494 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:04,494 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15915 transitions. [2021-06-05 15:08:04,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:04,500 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:04,500 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:04,715 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable618,284 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:04,716 INFO L430 AbstractCegarLoop]: === Iteration 285 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:04,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:04,716 INFO L82 PathProgramCache]: Analyzing trace with hash 276133971, now seen corresponding path program 130 times [2021-06-05 15:08:04,716 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:04,716 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320283247] [2021-06-05 15:08:04,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:04,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:04,810 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:04,810 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:04,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320283247] [2021-06-05 15:08:04,811 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320283247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:04,811 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831979774] [2021-06-05 15:08:04,811 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 285 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:04,837 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:04,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:04,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:04,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:04,919 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:04,920 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:04,921 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,928 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:04,929 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:04,929 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:05,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:05,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1831979774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:05,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:05,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:05,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501608420] [2021-06-05 15:08:05,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:05,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:05,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:05,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:05,009 INFO L87 Difference]: Start difference. First operand 3796 states and 15915 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:05,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:05,755 INFO L93 Difference]: Finished difference Result 4123 states and 17177 transitions. [2021-06-05 15:08:05,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:08:05,755 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:05,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:05,763 INFO L225 Difference]: With dead ends: 4123 [2021-06-05 15:08:05,763 INFO L226 Difference]: Without dead ends: 4102 [2021-06-05 15:08:05,763 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 669.1ms TimeCoverageRelationStatistics Valid=193, Invalid=863, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:05,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4102 states. [2021-06-05 15:08:05,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4102 to 3800. [2021-06-05 15:08:05,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.193471966306923) internal successors, (15931), 3799 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:05,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15931 transitions. [2021-06-05 15:08:05,813 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15931 transitions. Word has length 23 [2021-06-05 15:08:05,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:05,813 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15931 transitions. [2021-06-05 15:08:05,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:05,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15931 transitions. [2021-06-05 15:08:05,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:05,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:05,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:06,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 285 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable622 [2021-06-05 15:08:06,043 INFO L430 AbstractCegarLoop]: === Iteration 286 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:06,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:06,044 INFO L82 PathProgramCache]: Analyzing trace with hash 1351845127, now seen corresponding path program 131 times [2021-06-05 15:08:06,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:06,044 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [427398733] [2021-06-05 15:08:06,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:06,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:06,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:06,141 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:06,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [427398733] [2021-06-05 15:08:06,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [427398733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:06,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674111645] [2021-06-05 15:08:06,141 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 286 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:06,166 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:06,166 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:06,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:06,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:06,246 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:06,247 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:06,248 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:06,255 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:06,256 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:06,256 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:06,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:06,337 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674111645] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:06,337 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:06,337 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:06,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [397291003] [2021-06-05 15:08:06,337 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:06,337 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:06,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:06,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:06,337 INFO L87 Difference]: Start difference. First operand 3800 states and 15931 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:07,183 INFO L93 Difference]: Finished difference Result 4124 states and 17193 transitions. [2021-06-05 15:08:07,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:07,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:07,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:07,190 INFO L225 Difference]: With dead ends: 4124 [2021-06-05 15:08:07,190 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 15:08:07,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 725.3ms TimeCoverageRelationStatistics Valid=210, Invalid=980, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:08:07,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 15:08:07,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3792. [2021-06-05 15:08:07,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.193352677393827) internal successors, (15897), 3791 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15897 transitions. [2021-06-05 15:08:07,239 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15897 transitions. Word has length 23 [2021-06-05 15:08:07,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:07,239 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15897 transitions. [2021-06-05 15:08:07,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:07,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15897 transitions. [2021-06-05 15:08:07,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:07,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:07,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:07,445 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 286 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable624 [2021-06-05 15:08:07,445 INFO L430 AbstractCegarLoop]: === Iteration 287 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:07,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:07,445 INFO L82 PathProgramCache]: Analyzing trace with hash -146402489, now seen corresponding path program 132 times [2021-06-05 15:08:07,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:07,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1553261591] [2021-06-05 15:08:07,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:07,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:07,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:07,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1553261591] [2021-06-05 15:08:07,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1553261591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:07,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638871023] [2021-06-05 15:08:07,535 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 287 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:07,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:07,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:07,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:07,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:07,685 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:08:07,685 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:08:07,689 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:08:07,707 INFO L628 ElimStorePlain]: treesize reduction 55, result has 20.3 percent of original size [2021-06-05 15:08:07,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:07,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:08:07,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:07,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1638871023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:07,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:07,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:08:07,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [248275829] [2021-06-05 15:08:07,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:07,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:07,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:07,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:07,746 INFO L87 Difference]: Start difference. First operand 3792 states and 15897 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:08,388 INFO L93 Difference]: Finished difference Result 4163 states and 17343 transitions. [2021-06-05 15:08:08,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:08:08,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:08,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:08,395 INFO L225 Difference]: With dead ends: 4163 [2021-06-05 15:08:08,395 INFO L226 Difference]: Without dead ends: 4148 [2021-06-05 15:08:08,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 418.2ms TimeCoverageRelationStatistics Valid=140, Invalid=916, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:08,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-06-05 15:08:08,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3784. [2021-06-05 15:08:08,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.193232883954534) internal successors, (15863), 3783 states have internal predecessors, (15863), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 15863 transitions. [2021-06-05 15:08:08,445 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 15863 transitions. Word has length 23 [2021-06-05 15:08:08,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:08,445 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 15863 transitions. [2021-06-05 15:08:08,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:08,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 15863 transitions. [2021-06-05 15:08:08,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:08,474 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:08,474 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:08,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable626,287 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:08,674 INFO L430 AbstractCegarLoop]: === Iteration 288 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:08,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:08,675 INFO L82 PathProgramCache]: Analyzing trace with hash 3943545, now seen corresponding path program 133 times [2021-06-05 15:08:08,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:08,675 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583565568] [2021-06-05 15:08:08,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:08,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:08,756 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:08,756 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:08,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583565568] [2021-06-05 15:08:08,756 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583565568] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,756 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403068688] [2021-06-05 15:08:08,756 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 288 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:08,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:08,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:08,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:08,865 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:08,866 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:08,867 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:08,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:08,875 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:08,875 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:08,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:08,933 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [403068688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:08,933 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:08,933 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:08,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753991214] [2021-06-05 15:08:08,933 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:08,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:08,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:08,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:08,933 INFO L87 Difference]: Start difference. First operand 3784 states and 15863 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:09,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:09,721 INFO L93 Difference]: Finished difference Result 4544 states and 18861 transitions. [2021-06-05 15:08:09,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:08:09,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:09,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:09,730 INFO L225 Difference]: With dead ends: 4544 [2021-06-05 15:08:09,730 INFO L226 Difference]: Without dead ends: 4522 [2021-06-05 15:08:09,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 488.5ms TimeCoverageRelationStatistics Valid=182, Invalid=874, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:09,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4522 states. [2021-06-05 15:08:09,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4522 to 3796. [2021-06-05 15:08:09,776 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.194729907773386) internal successors, (15919), 3795 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:09,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15919 transitions. [2021-06-05 15:08:09,784 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15919 transitions. Word has length 23 [2021-06-05 15:08:09,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:09,784 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15919 transitions. [2021-06-05 15:08:09,784 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:09,785 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15919 transitions. [2021-06-05 15:08:09,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:09,789 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:09,789 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:09,990 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 288 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable630 [2021-06-05 15:08:09,990 INFO L430 AbstractCegarLoop]: === Iteration 289 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:09,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:09,990 INFO L82 PathProgramCache]: Analyzing trace with hash -902217415, now seen corresponding path program 134 times [2021-06-05 15:08:09,990 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:09,990 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116190789] [2021-06-05 15:08:09,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:09,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:10,072 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:10,072 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:10,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116190789] [2021-06-05 15:08:10,072 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116190789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:10,072 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035891412] [2021-06-05 15:08:10,072 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 289 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:10,096 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:10,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:10,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:10,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:10,169 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:10,170 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:10,171 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:10,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:10,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:10,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:10,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:10,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035891412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:10,257 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:10,257 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:10,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151131518] [2021-06-05 15:08:10,257 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:10,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:10,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:10,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:10,258 INFO L87 Difference]: Start difference. First operand 3796 states and 15919 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:10,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:10,988 INFO L93 Difference]: Finished difference Result 4393 states and 18248 transitions. [2021-06-05 15:08:10,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:08:10,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:10,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:10,996 INFO L225 Difference]: With dead ends: 4393 [2021-06-05 15:08:10,996 INFO L226 Difference]: Without dead ends: 4368 [2021-06-05 15:08:10,996 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 623.6ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:11,000 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4368 states. [2021-06-05 15:08:11,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4368 to 3800. [2021-06-05 15:08:11,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.1945248749670965) internal successors, (15935), 3799 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15935 transitions. [2021-06-05 15:08:11,047 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15935 transitions. Word has length 23 [2021-06-05 15:08:11,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:11,047 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15935 transitions. [2021-06-05 15:08:11,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:11,047 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15935 transitions. [2021-06-05 15:08:11,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:11,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:11,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:11,277 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable632,289 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:11,277 INFO L430 AbstractCegarLoop]: === Iteration 290 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:11,278 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:11,278 INFO L82 PathProgramCache]: Analyzing trace with hash 173493741, now seen corresponding path program 135 times [2021-06-05 15:08:11,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:11,278 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659727963] [2021-06-05 15:08:11,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:11,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:11,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:11,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:11,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659727963] [2021-06-05 15:08:11,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659727963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:11,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258222452] [2021-06-05 15:08:11,359 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 290 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:11,391 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:11,391 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:11,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:11,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:11,468 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:11,468 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:11,469 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:11,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:11,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:11,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:11,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:11,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1258222452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:11,555 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:11,555 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:11,555 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1050112503] [2021-06-05 15:08:11,555 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:11,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:11,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:11,555 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:11,555 INFO L87 Difference]: Start difference. First operand 3800 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:12,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:12,378 INFO L93 Difference]: Finished difference Result 4379 states and 18199 transitions. [2021-06-05 15:08:12,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:12,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:12,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:12,386 INFO L225 Difference]: With dead ends: 4379 [2021-06-05 15:08:12,386 INFO L226 Difference]: Without dead ends: 4358 [2021-06-05 15:08:12,386 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 628.0ms TimeCoverageRelationStatistics Valid=213, Invalid=909, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:08:12,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4358 states. [2021-06-05 15:08:12,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4358 to 3792. [2021-06-05 15:08:12,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.194407807966236) internal successors, (15901), 3791 states have internal predecessors, (15901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:12,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15901 transitions. [2021-06-05 15:08:12,437 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15901 transitions. Word has length 23 [2021-06-05 15:08:12,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:12,438 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15901 transitions. [2021-06-05 15:08:12,438 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:12,438 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15901 transitions. [2021-06-05 15:08:12,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:12,443 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:12,443 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:12,643 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 290 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable634 [2021-06-05 15:08:12,643 INFO L430 AbstractCegarLoop]: === Iteration 291 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:12,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:12,643 INFO L82 PathProgramCache]: Analyzing trace with hash -161265317, now seen corresponding path program 136 times [2021-06-05 15:08:12,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:12,643 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1793458822] [2021-06-05 15:08:12,643 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:12,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:12,720 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,721 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:12,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1793458822] [2021-06-05 15:08:12,721 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1793458822] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,721 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32599485] [2021-06-05 15:08:12,721 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 291 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:12,744 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:12,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:12,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:12,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:12,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:12,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:12,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:12,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:12,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:12,903 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:12,903 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [32599485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:12,903 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:12,903 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:12,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1132393388] [2021-06-05 15:08:12,903 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:12,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:12,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:12,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:12,903 INFO L87 Difference]: Start difference. First operand 3792 states and 15901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:13,644 INFO L93 Difference]: Finished difference Result 4644 states and 19238 transitions. [2021-06-05 15:08:13,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:08:13,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:13,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:13,653 INFO L225 Difference]: With dead ends: 4644 [2021-06-05 15:08:13,653 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 15:08:13,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 211 ImplicationChecksByTransitivity, 551.4ms TimeCoverageRelationStatistics Valid=187, Invalid=869, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:13,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 15:08:13,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 3796. [2021-06-05 15:08:13,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.194729907773386) internal successors, (15919), 3795 states have internal predecessors, (15919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15919 transitions. [2021-06-05 15:08:13,733 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15919 transitions. Word has length 23 [2021-06-05 15:08:13,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:13,733 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15919 transitions. [2021-06-05 15:08:13,733 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:13,733 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15919 transitions. [2021-06-05 15:08:13,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:13,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:13,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:13,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable636,291 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:13,938 INFO L430 AbstractCegarLoop]: === Iteration 292 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:13,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:13,939 INFO L82 PathProgramCache]: Analyzing trace with hash 426480005, now seen corresponding path program 137 times [2021-06-05 15:08:13,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:13,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811031728] [2021-06-05 15:08:13,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:14,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:14,021 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:14,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811031728] [2021-06-05 15:08:14,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1811031728] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:14,021 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373693842] [2021-06-05 15:08:14,021 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 292 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:14,048 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:14,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:14,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:08:14,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:14,145 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:14,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 15:08:14,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:14,157 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:14,159 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:14,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 15:08:14,198 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:14,198 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373693842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:14,198 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:14,198 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:08:14,198 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232527465] [2021-06-05 15:08:14,198 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:08:14,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:14,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:08:14,198 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=245, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:08:14,198 INFO L87 Difference]: Start difference. First operand 3796 states and 15919 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:14,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:14,676 INFO L93 Difference]: Finished difference Result 4358 states and 18111 transitions. [2021-06-05 15:08:14,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:14,677 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:14,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:14,685 INFO L225 Difference]: With dead ends: 4358 [2021-06-05 15:08:14,685 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 15:08:14,685 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 312.3ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:14,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 15:08:14,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3800. [2021-06-05 15:08:14,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.1945248749670965) internal successors, (15935), 3799 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:14,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15935 transitions. [2021-06-05 15:08:14,735 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15935 transitions. Word has length 23 [2021-06-05 15:08:14,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:14,736 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15935 transitions. [2021-06-05 15:08:14,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:14,736 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15935 transitions. [2021-06-05 15:08:14,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:14,741 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:14,741 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:14,941 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 292 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable638 [2021-06-05 15:08:14,941 INFO L430 AbstractCegarLoop]: === Iteration 293 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:14,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:14,941 INFO L82 PathProgramCache]: Analyzing trace with hash 1502191161, now seen corresponding path program 138 times [2021-06-05 15:08:14,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:14,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971435304] [2021-06-05 15:08:14,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:14,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:15,023 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:15,023 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971435304] [2021-06-05 15:08:15,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971435304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:15,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1920592225] [2021-06-05 15:08:15,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 293 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:15,047 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:15,048 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:15,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:15,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:15,122 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:15,122 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:15,123 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:15,130 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:15,131 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:15,131 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:15,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:15,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1920592225] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:15,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:15,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:15,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204937968] [2021-06-05 15:08:15,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:15,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:15,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:15,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:15,209 INFO L87 Difference]: Start difference. First operand 3800 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:16,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:16,039 INFO L93 Difference]: Finished difference Result 4380 states and 18199 transitions. [2021-06-05 15:08:16,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:16,040 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:16,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:16,047 INFO L225 Difference]: With dead ends: 4380 [2021-06-05 15:08:16,047 INFO L226 Difference]: Without dead ends: 4359 [2021-06-05 15:08:16,048 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=206, Invalid=916, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:08:16,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-06-05 15:08:16,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3788. [2021-06-05 15:08:16,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193556905202007) internal successors, (15881), 3787 states have internal predecessors, (15881), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:16,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15881 transitions. [2021-06-05 15:08:16,098 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15881 transitions. Word has length 23 [2021-06-05 15:08:16,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:16,098 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15881 transitions. [2021-06-05 15:08:16,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:16,098 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15881 transitions. [2021-06-05 15:08:16,103 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:16,103 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:16,103 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:16,303 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 293 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable641 [2021-06-05 15:08:16,304 INFO L430 AbstractCegarLoop]: === Iteration 294 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash -2108485085, now seen corresponding path program 139 times [2021-06-05 15:08:16,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:16,304 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1304546123] [2021-06-05 15:08:16,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:16,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:16,380 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1304546123] [2021-06-05 15:08:16,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1304546123] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:16,380 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [570208209] [2021-06-05 15:08:16,381 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 294 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:16,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:16,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:16,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:16,528 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:16,528 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:16,529 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:16,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:16,538 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:16,538 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:16,602 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:16,602 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [570208209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:16,602 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:16,602 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:16,602 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6702767] [2021-06-05 15:08:16,602 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:16,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:16,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:16,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:16,603 INFO L87 Difference]: Start difference. First operand 3788 states and 15881 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:17,217 INFO L93 Difference]: Finished difference Result 4286 states and 17831 transitions. [2021-06-05 15:08:17,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:08:17,217 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:17,217 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:17,225 INFO L225 Difference]: With dead ends: 4286 [2021-06-05 15:08:17,225 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 15:08:17,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 460.6ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:08:17,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 15:08:17,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3796. [2021-06-05 15:08:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.1936758893280635) internal successors, (15915), 3795 states have internal predecessors, (15915), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15915 transitions. [2021-06-05 15:08:17,279 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15915 transitions. Word has length 23 [2021-06-05 15:08:17,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:17,279 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15915 transitions. [2021-06-05 15:08:17,279 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:17,279 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15915 transitions. [2021-06-05 15:08:17,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:17,284 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:17,284 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:17,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 294 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable643 [2021-06-05 15:08:17,484 INFO L430 AbstractCegarLoop]: === Iteration 295 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:17,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:17,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1280321251, now seen corresponding path program 140 times [2021-06-05 15:08:17,485 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:17,485 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1958417995] [2021-06-05 15:08:17,485 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:17,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:17,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,568 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1958417995] [2021-06-05 15:08:17,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1958417995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,568 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883485259] [2021-06-05 15:08:17,568 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 295 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:17,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:17,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:17,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:17,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:17,671 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:17,671 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:17,672 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:17,680 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:17,680 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:17,680 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:17,759 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:17,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883485259] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:17,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:17,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:17,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1432318157] [2021-06-05 15:08:17,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:17,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:17,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:17,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:17,760 INFO L87 Difference]: Start difference. First operand 3796 states and 15915 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:18,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:18,526 INFO L93 Difference]: Finished difference Result 4194 states and 17454 transitions. [2021-06-05 15:08:18,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:18,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:18,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:18,535 INFO L225 Difference]: With dead ends: 4194 [2021-06-05 15:08:18,535 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 15:08:18,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 610.9ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:08:18,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 15:08:18,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3800. [2021-06-05 15:08:18,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.193471966306923) internal successors, (15931), 3799 states have internal predecessors, (15931), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:18,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15931 transitions. [2021-06-05 15:08:18,588 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15931 transitions. Word has length 23 [2021-06-05 15:08:18,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:18,589 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15931 transitions. [2021-06-05 15:08:18,589 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:18,589 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15931 transitions. [2021-06-05 15:08:18,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:18,594 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:18,594 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:18,794 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable645,295 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:18,794 INFO L430 AbstractCegarLoop]: === Iteration 296 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:18,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:18,794 INFO L82 PathProgramCache]: Analyzing trace with hash -1938934889, now seen corresponding path program 141 times [2021-06-05 15:08:18,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:18,794 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164989106] [2021-06-05 15:08:18,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:18,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:18,874 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:18,874 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:18,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164989106] [2021-06-05 15:08:18,874 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164989106] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:18,874 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585861918] [2021-06-05 15:08:18,874 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 296 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:18,898 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:08:18,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:18,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:08:18,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:18,988 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:19,008 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:19,008 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 15:08:19,009 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:19,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:19,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:19,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 15:08:19,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:19,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585861918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:19,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:19,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:08:19,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [678495629] [2021-06-05 15:08:19,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:19,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:19,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:19,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:19,127 INFO L87 Difference]: Start difference. First operand 3800 states and 15931 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:19,874 INFO L93 Difference]: Finished difference Result 4276 states and 17781 transitions. [2021-06-05 15:08:19,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:08:19,874 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:19,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:19,881 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 15:08:19,881 INFO L226 Difference]: Without dead ends: 4255 [2021-06-05 15:08:19,882 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 614.7ms TimeCoverageRelationStatistics Valid=197, Invalid=1209, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:08:19,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-06-05 15:08:19,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3792. [2021-06-05 15:08:19,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.193352677393827) internal successors, (15897), 3791 states have internal predecessors, (15897), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15897 transitions. [2021-06-05 15:08:19,932 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15897 transitions. Word has length 23 [2021-06-05 15:08:19,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:19,932 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15897 transitions. [2021-06-05 15:08:19,932 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:19,932 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15897 transitions. [2021-06-05 15:08:19,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:19,937 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:19,937 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:20,137 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable647,296 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,137 INFO L430 AbstractCegarLoop]: === Iteration 297 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:20,137 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:20,138 INFO L82 PathProgramCache]: Analyzing trace with hash 857784791, now seen corresponding path program 142 times [2021-06-05 15:08:20,138 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:20,138 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1944547250] [2021-06-05 15:08:20,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:20,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:20,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:20,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1944547250] [2021-06-05 15:08:20,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1944547250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781369615] [2021-06-05 15:08:20,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 297 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:20,236 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:20,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:20,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:20,237 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:20,327 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:20,327 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:20,328 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,335 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:20,336 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:20,336 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:20,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:20,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [781369615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:20,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:20,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:20,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704451075] [2021-06-05 15:08:20,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:20,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:20,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:20,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:20,395 INFO L87 Difference]: Start difference. First operand 3792 states and 15897 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:20,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:20,944 INFO L93 Difference]: Finished difference Result 4201 states and 17496 transitions. [2021-06-05 15:08:20,944 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:08:20,944 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:20,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:20,951 INFO L225 Difference]: With dead ends: 4201 [2021-06-05 15:08:20,951 INFO L226 Difference]: Without dead ends: 4178 [2021-06-05 15:08:20,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 443.0ms TimeCoverageRelationStatistics Valid=148, Invalid=722, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:08:20,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-06-05 15:08:20,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3780. [2021-06-05 15:08:20,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3780 states, 3779 states have (on average 4.192378936226515) internal successors, (15843), 3779 states have internal predecessors, (15843), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3780 states to 3780 states and 15843 transitions. [2021-06-05 15:08:21,000 INFO L78 Accepts]: Start accepts. Automaton has 3780 states and 15843 transitions. Word has length 23 [2021-06-05 15:08:21,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:21,001 INFO L482 AbstractCegarLoop]: Abstraction has 3780 states and 15843 transitions. [2021-06-05 15:08:21,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3780 states and 15843 transitions. [2021-06-05 15:08:21,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:21,005 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:21,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:21,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 297 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable651 [2021-06-05 15:08:21,206 INFO L430 AbstractCegarLoop]: === Iteration 298 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:21,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:21,206 INFO L82 PathProgramCache]: Analyzing trace with hash 833044733, now seen corresponding path program 143 times [2021-06-05 15:08:21,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:21,206 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1458724108] [2021-06-05 15:08:21,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:21,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:21,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:21,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:21,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1458724108] [2021-06-05 15:08:21,292 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1458724108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:21,292 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661141521] [2021-06-05 15:08:21,292 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 298 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:21,316 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:21,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:21,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:21,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:21,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:21,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:21,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:21,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:21,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:21,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:21,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:21,476 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1661141521] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:21,476 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:21,476 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:21,476 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719968726] [2021-06-05 15:08:21,476 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:21,476 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:21,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:21,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:21,476 INFO L87 Difference]: Start difference. First operand 3780 states and 15843 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:21,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:21,983 INFO L93 Difference]: Finished difference Result 4130 states and 17208 transitions. [2021-06-05 15:08:21,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:08:21,984 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:21,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:21,990 INFO L225 Difference]: With dead ends: 4130 [2021-06-05 15:08:21,990 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 15:08:21,991 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 413.3ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:08:21,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 15:08:22,028 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3786. [2021-06-05 15:08:22,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.192866578599736) internal successors, (15870), 3785 states have internal predecessors, (15870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:22,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 15870 transitions. [2021-06-05 15:08:22,039 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 15870 transitions. Word has length 23 [2021-06-05 15:08:22,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:22,039 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 15870 transitions. [2021-06-05 15:08:22,039 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:22,039 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 15870 transitions. [2021-06-05 15:08:22,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:22,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:22,044 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:22,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 298 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable653 [2021-06-05 15:08:22,244 INFO L430 AbstractCegarLoop]: === Iteration 299 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:22,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:22,245 INFO L82 PathProgramCache]: Analyzing trace with hash 1418378685, now seen corresponding path program 144 times [2021-06-05 15:08:22,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:22,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28575512] [2021-06-05 15:08:22,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:22,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:22,333 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:22,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28575512] [2021-06-05 15:08:22,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28575512] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:22,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [55154033] [2021-06-05 15:08:22,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 299 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:22,357 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:22,358 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:22,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:22,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:22,443 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:22,463 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:22,463 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:08:22,464 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:22,476 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:22,476 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:22,477 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:08:22,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:22,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [55154033] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:22,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:22,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:08:22,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [779250029] [2021-06-05 15:08:22,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:22,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:22,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:22,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:22,553 INFO L87 Difference]: Start difference. First operand 3786 states and 15870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:23,093 INFO L93 Difference]: Finished difference Result 4176 states and 17375 transitions. [2021-06-05 15:08:23,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:08:23,094 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:23,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:23,100 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 15:08:23,100 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 15:08:23,101 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 466.3ms TimeCoverageRelationStatistics Valid=181, Invalid=1079, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:08:23,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 15:08:23,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3790. [2021-06-05 15:08:23,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.192662971760359) internal successors, (15886), 3789 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15886 transitions. [2021-06-05 15:08:23,151 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15886 transitions. Word has length 23 [2021-06-05 15:08:23,151 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:23,151 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15886 transitions. [2021-06-05 15:08:23,151 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:23,151 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15886 transitions. [2021-06-05 15:08:23,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:23,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:23,156 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:23,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable655,299 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:23,356 INFO L430 AbstractCegarLoop]: === Iteration 300 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:23,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:23,356 INFO L82 PathProgramCache]: Analyzing trace with hash -1263021877, now seen corresponding path program 145 times [2021-06-05 15:08:23,356 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:23,356 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005859422] [2021-06-05 15:08:23,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:23,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:23,443 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:23,443 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005859422] [2021-06-05 15:08:23,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005859422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:23,443 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385251025] [2021-06-05 15:08:23,443 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 300 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:23,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:23,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:23,468 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:23,542 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:23,543 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:23,544 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:23,551 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:23,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:23,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:23,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:23,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385251025] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:23,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:23,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:23,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278878928] [2021-06-05 15:08:23,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:23,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:23,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:23,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:23,629 INFO L87 Difference]: Start difference. First operand 3790 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:24,117 INFO L93 Difference]: Finished difference Result 4066 states and 16938 transitions. [2021-06-05 15:08:24,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:24,117 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:24,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:24,124 INFO L225 Difference]: With dead ends: 4066 [2021-06-05 15:08:24,124 INFO L226 Difference]: Without dead ends: 4045 [2021-06-05 15:08:24,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 424.6ms TimeCoverageRelationStatistics Valid=138, Invalid=618, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:24,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4045 states. [2021-06-05 15:08:24,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4045 to 3782. [2021-06-05 15:08:24,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3782 states, 3781 states have (on average 4.192541655646655) internal successors, (15852), 3781 states have internal predecessors, (15852), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3782 states to 3782 states and 15852 transitions. [2021-06-05 15:08:24,203 INFO L78 Accepts]: Start accepts. Automaton has 3782 states and 15852 transitions. Word has length 23 [2021-06-05 15:08:24,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:24,203 INFO L482 AbstractCegarLoop]: Abstraction has 3782 states and 15852 transitions. [2021-06-05 15:08:24,203 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:24,203 INFO L276 IsEmpty]: Start isEmpty. Operand 3782 states and 15852 transitions. [2021-06-05 15:08:24,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:24,208 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:24,208 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:24,408 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 300 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable659 [2021-06-05 15:08:24,408 INFO L430 AbstractCegarLoop]: === Iteration 301 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:24,409 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:24,409 INFO L82 PathProgramCache]: Analyzing trace with hash 605823353, now seen corresponding path program 146 times [2021-06-05 15:08:24,409 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:24,409 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1294891607] [2021-06-05 15:08:24,409 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:24,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:24,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:24,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1294891607] [2021-06-05 15:08:24,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1294891607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45053375] [2021-06-05 15:08:24,496 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 301 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:24,519 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:24,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:24,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:24,520 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:24,614 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:24,614 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:24,615 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:24,623 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:24,624 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:24,624 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:24,681 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45053375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:24,681 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:24,681 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:24,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693814153] [2021-06-05 15:08:24,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:24,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:24,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:24,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:24,682 INFO L87 Difference]: Start difference. First operand 3782 states and 15852 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:25,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:25,262 INFO L93 Difference]: Finished difference Result 4296 states and 17871 transitions. [2021-06-05 15:08:25,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:08:25,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:25,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:25,269 INFO L225 Difference]: With dead ends: 4296 [2021-06-05 15:08:25,269 INFO L226 Difference]: Without dead ends: 4274 [2021-06-05 15:08:25,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 406.0ms TimeCoverageRelationStatistics Valid=133, Invalid=679, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:08:25,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-05 15:08:25,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3790. [2021-06-05 15:08:25,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.192926893639482) internal successors, (15887), 3789 states have internal predecessors, (15887), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:25,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15887 transitions. [2021-06-05 15:08:25,320 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15887 transitions. Word has length 23 [2021-06-05 15:08:25,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:25,320 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15887 transitions. [2021-06-05 15:08:25,320 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:25,320 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15887 transitions. [2021-06-05 15:08:25,325 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:25,325 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:25,325 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:25,525 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable661,301 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:25,526 INFO L430 AbstractCegarLoop]: === Iteration 302 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:25,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:25,526 INFO L82 PathProgramCache]: Analyzing trace with hash 1119350205, now seen corresponding path program 147 times [2021-06-05 15:08:25,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:25,526 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391502918] [2021-06-05 15:08:25,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:25,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:25,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:25,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:25,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391502918] [2021-06-05 15:08:25,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391502918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:25,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294594459] [2021-06-05 15:08:25,617 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 302 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:25,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:08:25,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:25,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:25,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:25,718 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:25,718 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:25,719 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:25,726 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:25,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:25,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:25,803 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:25,803 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [294594459] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:25,803 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:25,803 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:25,803 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8868206] [2021-06-05 15:08:25,803 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:25,803 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:25,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:25,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:25,804 INFO L87 Difference]: Start difference. First operand 3790 states and 15887 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:26,473 INFO L93 Difference]: Finished difference Result 4158 states and 17313 transitions. [2021-06-05 15:08:26,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:08:26,474 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:26,474 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:26,481 INFO L225 Difference]: With dead ends: 4158 [2021-06-05 15:08:26,481 INFO L226 Difference]: Without dead ends: 4133 [2021-06-05 15:08:26,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 584.4ms TimeCoverageRelationStatistics Valid=192, Invalid=864, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:26,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-06-05 15:08:26,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3794. [2021-06-05 15:08:26,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.192723437911943) internal successors, (15903), 3793 states have internal predecessors, (15903), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15903 transitions. [2021-06-05 15:08:26,530 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15903 transitions. Word has length 23 [2021-06-05 15:08:26,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:26,530 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15903 transitions. [2021-06-05 15:08:26,530 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:26,530 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15903 transitions. [2021-06-05 15:08:26,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:26,535 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:26,535 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:26,735 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 302 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable663 [2021-06-05 15:08:26,736 INFO L430 AbstractCegarLoop]: === Iteration 303 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:26,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:26,736 INFO L82 PathProgramCache]: Analyzing trace with hash -2099905935, now seen corresponding path program 148 times [2021-06-05 15:08:26,736 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:26,736 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1362879542] [2021-06-05 15:08:26,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:26,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:26,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:26,830 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:26,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1362879542] [2021-06-05 15:08:26,830 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1362879542] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:26,830 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782401992] [2021-06-05 15:08:26,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 303 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:26,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:26,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:26,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:26,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:26,956 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:26,956 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:26,957 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:26,964 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:26,965 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:26,965 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:27,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:27,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1782401992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:27,042 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:27,042 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:27,042 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376058402] [2021-06-05 15:08:27,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:27,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:27,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:27,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:27,042 INFO L87 Difference]: Start difference. First operand 3794 states and 15903 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:27,745 INFO L93 Difference]: Finished difference Result 4162 states and 17329 transitions. [2021-06-05 15:08:27,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:27,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:27,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:27,753 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 15:08:27,753 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 15:08:27,753 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 582.2ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:08:27,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 15:08:27,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3786. [2021-06-05 15:08:27,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3786 states, 3785 states have (on average 4.192602377807133) internal successors, (15869), 3785 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3786 states to 3786 states and 15869 transitions. [2021-06-05 15:08:27,803 INFO L78 Accepts]: Start accepts. Automaton has 3786 states and 15869 transitions. Word has length 23 [2021-06-05 15:08:27,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:27,803 INFO L482 AbstractCegarLoop]: Abstraction has 3786 states and 15869 transitions. [2021-06-05 15:08:27,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:27,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3786 states and 15869 transitions. [2021-06-05 15:08:27,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:27,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:27,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:28,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable665,303 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:28,008 INFO L430 AbstractCegarLoop]: === Iteration 304 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:28,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:28,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1818910083, now seen corresponding path program 149 times [2021-06-05 15:08:28,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:28,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [628811995] [2021-06-05 15:08:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:28,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:28,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:28,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:28,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [628811995] [2021-06-05 15:08:28,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [628811995] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675186840] [2021-06-05 15:08:28,104 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 304 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:28,128 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:28,128 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:28,129 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:08:28,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:28,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:28,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:08:28,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:28,211 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:28,212 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:28,212 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:34 [2021-06-05 15:08:28,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:28,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675186840] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:28,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:28,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:08:28,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418284514] [2021-06-05 15:08:28,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:08:28,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:28,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:08:28,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:08:28,282 INFO L87 Difference]: Start difference. First operand 3786 states and 15869 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:28,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:28,685 INFO L93 Difference]: Finished difference Result 4022 states and 16771 transitions. [2021-06-05 15:08:28,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:08:28,686 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:28,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:28,693 INFO L225 Difference]: With dead ends: 4022 [2021-06-05 15:08:28,693 INFO L226 Difference]: Without dead ends: 3996 [2021-06-05 15:08:28,693 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 372.8ms TimeCoverageRelationStatistics Valid=106, Invalid=544, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:28,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3996 states. [2021-06-05 15:08:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3996 to 3795. [2021-06-05 15:08:28,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.191091196626252) internal successors, (15901), 3794 states have internal predecessors, (15901), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:28,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15901 transitions. [2021-06-05 15:08:28,742 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15901 transitions. Word has length 23 [2021-06-05 15:08:28,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:28,742 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15901 transitions. [2021-06-05 15:08:28,742 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:28,742 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15901 transitions. [2021-06-05 15:08:28,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:28,747 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:28,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:28,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 304 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable667 [2021-06-05 15:08:28,947 INFO L430 AbstractCegarLoop]: === Iteration 305 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:28,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:28,947 INFO L82 PathProgramCache]: Analyzing trace with hash 1434481145, now seen corresponding path program 150 times [2021-06-05 15:08:28,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:28,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1732684851] [2021-06-05 15:08:28,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:28,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:29,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:29,042 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1732684851] [2021-06-05 15:08:29,042 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1732684851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:29,042 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1525358951] [2021-06-05 15:08:29,042 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 305 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:29,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:29,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:29,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:08:29,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:29,128 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:29,128 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:29,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:29,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:08:29,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:29,143 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:29,143 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:29,143 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 15:08:29,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:29,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1525358951] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:29,225 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:29,225 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:29,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902197161] [2021-06-05 15:08:29,225 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:29,225 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:29,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:29,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:29,226 INFO L87 Difference]: Start difference. First operand 3795 states and 15901 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:29,636 INFO L93 Difference]: Finished difference Result 3999 states and 16678 transitions. [2021-06-05 15:08:29,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:08:29,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:29,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:29,643 INFO L225 Difference]: With dead ends: 3999 [2021-06-05 15:08:29,643 INFO L226 Difference]: Without dead ends: 3971 [2021-06-05 15:08:29,643 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 352.9ms TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:29,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3971 states. [2021-06-05 15:08:29,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3971 to 3788. [2021-06-05 15:08:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.192500660153155) internal successors, (15877), 3787 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15877 transitions. [2021-06-05 15:08:29,693 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15877 transitions. Word has length 23 [2021-06-05 15:08:29,693 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:29,693 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15877 transitions. [2021-06-05 15:08:29,693 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:29,693 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15877 transitions. [2021-06-05 15:08:29,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:29,698 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:29,698 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:29,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 305 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable670 [2021-06-05 15:08:29,898 INFO L430 AbstractCegarLoop]: === Iteration 306 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:29,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:29,898 INFO L82 PathProgramCache]: Analyzing trace with hash 1147359793, now seen corresponding path program 151 times [2021-06-05 15:08:29,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:29,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896196235] [2021-06-05 15:08:29,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:29,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:29,998 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896196235] [2021-06-05 15:08:29,998 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896196235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:29,998 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1591071325] [2021-06-05 15:08:29,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 306 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:30,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:30,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:30,024 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:30,088 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:30,088 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:30,089 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,098 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:30,098 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:30,098 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:30,195 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:30,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1591071325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:30,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:30,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:30,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1443792935] [2021-06-05 15:08:30,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:30,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:30,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:30,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:30,196 INFO L87 Difference]: Start difference. First operand 3788 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:30,692 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:30,692 INFO L93 Difference]: Finished difference Result 4034 states and 16813 transitions. [2021-06-05 15:08:30,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:08:30,692 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:30,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:30,699 INFO L225 Difference]: With dead ends: 4034 [2021-06-05 15:08:30,699 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 15:08:30,699 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 472.1ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:08:30,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 15:08:30,736 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3792. [2021-06-05 15:08:30,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.192297546821419) internal successors, (15893), 3791 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:30,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15893 transitions. [2021-06-05 15:08:30,747 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15893 transitions. Word has length 23 [2021-06-05 15:08:30,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:30,747 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15893 transitions. [2021-06-05 15:08:30,747 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:30,747 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15893 transitions. [2021-06-05 15:08:30,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:30,752 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:30,752 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:30,952 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable671,306 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:30,953 INFO L430 AbstractCegarLoop]: === Iteration 307 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:30,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:30,953 INFO L82 PathProgramCache]: Analyzing trace with hash 654142407, now seen corresponding path program 152 times [2021-06-05 15:08:30,953 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:30,953 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [254966569] [2021-06-05 15:08:30,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:30,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:31,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:31,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:31,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [254966569] [2021-06-05 15:08:31,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [254966569] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:31,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [301908779] [2021-06-05 15:08:31,045 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 307 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:31,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:31,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:31,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:31,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:31,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:31,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:31,135 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:31,144 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:31,144 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:31,144 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:31,241 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:31,241 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [301908779] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:31,241 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:31,242 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704520560] [2021-06-05 15:08:31,242 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:31,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:31,242 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:31,242 INFO L87 Difference]: Start difference. First operand 3792 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:31,631 INFO L93 Difference]: Finished difference Result 4037 states and 16824 transitions. [2021-06-05 15:08:31,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:08:31,631 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:31,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:31,638 INFO L225 Difference]: With dead ends: 4037 [2021-06-05 15:08:31,638 INFO L226 Difference]: Without dead ends: 4016 [2021-06-05 15:08:31,638 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:31,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4016 states. [2021-06-05 15:08:31,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4016 to 3788. [2021-06-05 15:08:31,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.192500660153155) internal successors, (15877), 3787 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15877 transitions. [2021-06-05 15:08:31,685 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15877 transitions. Word has length 23 [2021-06-05 15:08:31,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:31,686 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15877 transitions. [2021-06-05 15:08:31,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:31,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15877 transitions. [2021-06-05 15:08:31,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:31,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:31,690 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:31,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 307 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable673 [2021-06-05 15:08:31,891 INFO L430 AbstractCegarLoop]: === Iteration 308 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:31,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:31,891 INFO L82 PathProgramCache]: Analyzing trace with hash 1588918663, now seen corresponding path program 153 times [2021-06-05 15:08:31,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:31,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95763856] [2021-06-05 15:08:31,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:31,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:31,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:31,987 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95763856] [2021-06-05 15:08:31,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95763856] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:31,987 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56247888] [2021-06-05 15:08:31,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 308 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:32,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:32,012 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:32,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:32,013 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:32,100 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,101 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:32,102 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,110 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:32,111 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:32,111 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:32,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:32,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56247888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:32,209 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:32,209 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:32,209 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178623336] [2021-06-05 15:08:32,209 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:32,209 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:32,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:32,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:32,209 INFO L87 Difference]: Start difference. First operand 3788 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:32,678 INFO L93 Difference]: Finished difference Result 4024 states and 16775 transitions. [2021-06-05 15:08:32,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:08:32,679 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:32,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:32,685 INFO L225 Difference]: With dead ends: 4024 [2021-06-05 15:08:32,685 INFO L226 Difference]: Without dead ends: 3999 [2021-06-05 15:08:32,686 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 479.7ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:32,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3999 states. [2021-06-05 15:08:32,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3999 to 3792. [2021-06-05 15:08:32,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.192297546821419) internal successors, (15893), 3791 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15893 transitions. [2021-06-05 15:08:32,734 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15893 transitions. Word has length 23 [2021-06-05 15:08:32,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:32,734 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15893 transitions. [2021-06-05 15:08:32,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:32,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15893 transitions. [2021-06-05 15:08:32,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:32,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:32,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:32,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 308 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable675 [2021-06-05 15:08:32,939 INFO L430 AbstractCegarLoop]: === Iteration 309 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:32,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:32,939 INFO L82 PathProgramCache]: Analyzing trace with hash 576226131, now seen corresponding path program 154 times [2021-06-05 15:08:32,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:32,939 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134299586] [2021-06-05 15:08:32,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:32,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:33,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:33,035 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:33,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134299586] [2021-06-05 15:08:33,035 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134299586] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:33,035 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152447449] [2021-06-05 15:08:33,035 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 309 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:33,059 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:33,059 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:33,059 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:33,060 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:33,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:33,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:33,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:33,134 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:33,134 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:33,134 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:33,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:33,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1152447449] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:33,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:33,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:33,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580910814] [2021-06-05 15:08:33,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:33,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:33,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:33,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:33,232 INFO L87 Difference]: Start difference. First operand 3792 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:33,696 INFO L93 Difference]: Finished difference Result 4028 states and 16788 transitions. [2021-06-05 15:08:33,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:08:33,696 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:33,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:33,703 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 15:08:33,703 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 15:08:33,703 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:33,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 15:08:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3784. [2021-06-05 15:08:33,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3784 states, 3783 states have (on average 4.1924398625429555) internal successors, (15860), 3783 states have internal predecessors, (15860), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3784 states to 3784 states and 15860 transitions. [2021-06-05 15:08:33,753 INFO L78 Accepts]: Start accepts. Automaton has 3784 states and 15860 transitions. Word has length 23 [2021-06-05 15:08:33,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:33,753 INFO L482 AbstractCegarLoop]: Abstraction has 3784 states and 15860 transitions. [2021-06-05 15:08:33,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:33,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3784 states and 15860 transitions. [2021-06-05 15:08:33,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:33,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:33,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:33,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 309 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable677 [2021-06-05 15:08:33,958 INFO L430 AbstractCegarLoop]: === Iteration 310 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:33,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:33,958 INFO L82 PathProgramCache]: Analyzing trace with hash -242799119, now seen corresponding path program 155 times [2021-06-05 15:08:33,958 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:33,958 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183540610] [2021-06-05 15:08:33,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:33,960 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:34,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:34,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183540610] [2021-06-05 15:08:34,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183540610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:34,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032892786] [2021-06-05 15:08:34,045 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 310 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:34,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:34,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:34,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:34,072 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:34,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:34,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:34,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:34,170 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:34,171 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:34,171 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:34,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2032892786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:34,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:34,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:34,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71521621] [2021-06-05 15:08:34,246 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:34,246 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:34,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:34,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:34,246 INFO L87 Difference]: Start difference. First operand 3784 states and 15860 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:34,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:34,840 INFO L93 Difference]: Finished difference Result 4539 states and 18837 transitions. [2021-06-05 15:08:34,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:34,840 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:34,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:34,848 INFO L225 Difference]: With dead ends: 4539 [2021-06-05 15:08:34,848 INFO L226 Difference]: Without dead ends: 4517 [2021-06-05 15:08:34,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 461.9ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:08:34,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4517 states. [2021-06-05 15:08:34,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4517 to 3792. [2021-06-05 15:08:34,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.19361646003693) internal successors, (15898), 3791 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:34,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15898 transitions. [2021-06-05 15:08:34,900 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15898 transitions. Word has length 23 [2021-06-05 15:08:34,900 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:34,900 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15898 transitions. [2021-06-05 15:08:34,900 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:34,900 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15898 transitions. [2021-06-05 15:08:34,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:34,905 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:34,905 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:35,105 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 310 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable679 [2021-06-05 15:08:35,106 INFO L430 AbstractCegarLoop]: === Iteration 311 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:35,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:35,106 INFO L82 PathProgramCache]: Analyzing trace with hash 270727733, now seen corresponding path program 156 times [2021-06-05 15:08:35,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:35,106 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [33812627] [2021-06-05 15:08:35,106 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:35,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:35,196 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:35,196 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:35,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [33812627] [2021-06-05 15:08:35,196 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [33812627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:35,196 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [601879513] [2021-06-05 15:08:35,196 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 311 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:35,221 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:08:35,221 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:35,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:35,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:35,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:35,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:35,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:35,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:35,304 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:35,304 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:35,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:35,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [601879513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:35,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:35,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:35,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31439442] [2021-06-05 15:08:35,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:35,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:35,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:35,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:35,380 INFO L87 Difference]: Start difference. First operand 3792 states and 15898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:36,079 INFO L93 Difference]: Finished difference Result 4351 states and 18079 transitions. [2021-06-05 15:08:36,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:36,079 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:36,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:36,086 INFO L225 Difference]: With dead ends: 4351 [2021-06-05 15:08:36,087 INFO L226 Difference]: Without dead ends: 4326 [2021-06-05 15:08:36,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 603.7ms TimeCoverageRelationStatistics Valid=225, Invalid=897, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:08:36,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4326 states. [2021-06-05 15:08:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4326 to 3796. [2021-06-05 15:08:36,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.193412384716733) internal successors, (15914), 3795 states have internal predecessors, (15914), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15914 transitions. [2021-06-05 15:08:36,139 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15914 transitions. Word has length 23 [2021-06-05 15:08:36,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:36,139 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15914 transitions. [2021-06-05 15:08:36,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:36,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15914 transitions. [2021-06-05 15:08:36,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:36,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:36,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:36,344 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable681,311 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:36,344 INFO L430 AbstractCegarLoop]: === Iteration 312 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:36,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:36,344 INFO L82 PathProgramCache]: Analyzing trace with hash 1346438889, now seen corresponding path program 157 times [2021-06-05 15:08:36,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:36,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132970666] [2021-06-05 15:08:36,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:36,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:36,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:36,436 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:36,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132970666] [2021-06-05 15:08:36,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132970666] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:36,436 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664450202] [2021-06-05 15:08:36,436 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 312 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:36,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:36,460 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:36,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:36,541 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:36,541 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:36,542 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:36,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:36,552 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:36,552 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:36,641 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:36,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [664450202] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:36,641 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:36,641 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:36,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1452082373] [2021-06-05 15:08:36,641 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:36,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:36,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:36,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:36,642 INFO L87 Difference]: Start difference. First operand 3796 states and 15914 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:37,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:37,345 INFO L93 Difference]: Finished difference Result 4353 states and 18091 transitions. [2021-06-05 15:08:37,345 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:08:37,346 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:37,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:37,353 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 15:08:37,353 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 15:08:37,353 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 614.3ms TimeCoverageRelationStatistics Valid=211, Invalid=845, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:37,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 15:08:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3788. [2021-06-05 15:08:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.193292843939794) internal successors, (15880), 3787 states have internal predecessors, (15880), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:37,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15880 transitions. [2021-06-05 15:08:37,406 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15880 transitions. Word has length 23 [2021-06-05 15:08:37,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:37,406 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15880 transitions. [2021-06-05 15:08:37,406 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:37,406 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15880 transitions. [2021-06-05 15:08:37,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:37,411 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:37,411 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:37,612 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 312 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable683 [2021-06-05 15:08:37,612 INFO L430 AbstractCegarLoop]: === Iteration 313 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:37,612 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:37,612 INFO L82 PathProgramCache]: Analyzing trace with hash 166708379, now seen corresponding path program 158 times [2021-06-05 15:08:37,612 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:37,612 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [176381427] [2021-06-05 15:08:37,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:37,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:37,699 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:37,699 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:37,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [176381427] [2021-06-05 15:08:37,699 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [176381427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:37,699 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1437465279] [2021-06-05 15:08:37,699 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 313 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:37,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:37,724 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:37,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:37,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:37,812 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:37,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:37,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:37,821 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:37,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:37,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:37,880 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:37,880 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1437465279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:37,880 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:37,880 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:37,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23048781] [2021-06-05 15:08:37,881 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:37,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:37,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:37,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:37,881 INFO L87 Difference]: Start difference. First operand 3788 states and 15880 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:38,622 INFO L93 Difference]: Finished difference Result 4542 states and 18821 transitions. [2021-06-05 15:08:38,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:08:38,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:38,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:38,630 INFO L225 Difference]: With dead ends: 4542 [2021-06-05 15:08:38,630 INFO L226 Difference]: Without dead ends: 4511 [2021-06-05 15:08:38,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 542.6ms TimeCoverageRelationStatistics Valid=208, Invalid=914, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:08:38,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4511 states. [2021-06-05 15:08:38,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4511 to 3792. [2021-06-05 15:08:38,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.19361646003693) internal successors, (15898), 3791 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15898 transitions. [2021-06-05 15:08:38,683 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15898 transitions. Word has length 23 [2021-06-05 15:08:38,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:38,683 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15898 transitions. [2021-06-05 15:08:38,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:38,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15898 transitions. [2021-06-05 15:08:38,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:38,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:38,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:38,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 313 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable685 [2021-06-05 15:08:38,888 INFO L430 AbstractCegarLoop]: === Iteration 314 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:38,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:38,888 INFO L82 PathProgramCache]: Analyzing trace with hash 754453701, now seen corresponding path program 159 times [2021-06-05 15:08:38,888 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:38,888 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569315657] [2021-06-05 15:08:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:38,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:38,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:38,980 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:38,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569315657] [2021-06-05 15:08:38,980 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1569315657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:38,980 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650035261] [2021-06-05 15:08:38,980 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 314 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:39,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:39,005 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:39,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:08:39,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:39,085 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:39,105 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:39,105 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:08:39,106 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:39,117 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:39,117 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:39,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:08:39,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:39,206 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650035261] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:39,206 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:39,206 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:08:39,206 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177869580] [2021-06-05 15:08:39,206 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:39,206 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:39,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:39,207 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:39,207 INFO L87 Difference]: Start difference. First operand 3792 states and 15898 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:40,138 INFO L93 Difference]: Finished difference Result 4418 states and 18365 transitions. [2021-06-05 15:08:40,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:08:40,139 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:40,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:40,147 INFO L225 Difference]: With dead ends: 4418 [2021-06-05 15:08:40,147 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 15:08:40,147 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 653.1ms TimeCoverageRelationStatistics Valid=229, Invalid=1411, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:08:40,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 15:08:40,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3804. [2021-06-05 15:08:40,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.192216671049172) internal successors, (15943), 3803 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15943 transitions. [2021-06-05 15:08:40,202 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15943 transitions. Word has length 23 [2021-06-05 15:08:40,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:40,202 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15943 transitions. [2021-06-05 15:08:40,202 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:40,202 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15943 transitions. [2021-06-05 15:08:40,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:40,207 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:40,207 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:40,407 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 314 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable687 [2021-06-05 15:08:40,407 INFO L430 AbstractCegarLoop]: === Iteration 315 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:40,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:40,407 INFO L82 PathProgramCache]: Analyzing trace with hash 1830164857, now seen corresponding path program 160 times [2021-06-05 15:08:40,408 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:40,408 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087385614] [2021-06-05 15:08:40,408 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:40,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:40,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:40,498 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:40,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087385614] [2021-06-05 15:08:40,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087385614] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:40,498 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2024886478] [2021-06-05 15:08:40,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 315 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:40,522 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:40,522 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:40,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:40,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:40,595 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:40,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:40,603 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:40,604 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:40,604 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:40,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2024886478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:40,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:40,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:40,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908710869] [2021-06-05 15:08:40,683 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:40,683 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:40,683 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:40,683 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:40,683 INFO L87 Difference]: Start difference. First operand 3804 states and 15943 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:41,367 INFO L93 Difference]: Finished difference Result 4380 states and 18184 transitions. [2021-06-05 15:08:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:08:41,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:41,375 INFO L225 Difference]: With dead ends: 4380 [2021-06-05 15:08:41,375 INFO L226 Difference]: Without dead ends: 4359 [2021-06-05 15:08:41,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 559.2ms TimeCoverageRelationStatistics Valid=192, Invalid=738, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:08:41,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4359 states. [2021-06-05 15:08:41,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4359 to 3792. [2021-06-05 15:08:41,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.191242416249011) internal successors, (15889), 3791 states have internal predecessors, (15889), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15889 transitions. [2021-06-05 15:08:41,425 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15889 transitions. Word has length 23 [2021-06-05 15:08:41,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:41,425 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15889 transitions. [2021-06-05 15:08:41,425 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:41,425 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15889 transitions. [2021-06-05 15:08:41,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:41,430 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:41,430 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:41,630 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable691,315 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:41,630 INFO L430 AbstractCegarLoop]: === Iteration 316 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:41,631 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:41,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1566452255, now seen corresponding path program 161 times [2021-06-05 15:08:41,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:41,631 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985413976] [2021-06-05 15:08:41,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:41,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:41,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985413976] [2021-06-05 15:08:41,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985413976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:41,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1025515108] [2021-06-05 15:08:41,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 316 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:41,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:41,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:41,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:41,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:41,821 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:41,821 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:41,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:41,831 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:41,831 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:41,831 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:08:41,912 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:41,912 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1025515108] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:41,912 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:41,912 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:41,912 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465216307] [2021-06-05 15:08:41,912 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:41,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:41,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:41,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:41,913 INFO L87 Difference]: Start difference. First operand 3792 states and 15889 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:42,519 INFO L93 Difference]: Finished difference Result 4170 states and 17358 transitions. [2021-06-05 15:08:42,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:08:42,520 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:42,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:42,527 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 15:08:42,527 INFO L226 Difference]: Without dead ends: 4144 [2021-06-05 15:08:42,527 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 457.2ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:42,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4144 states. [2021-06-05 15:08:42,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4144 to 3802. [2021-06-05 15:08:42,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.18863456985004) internal successors, (15921), 3801 states have internal predecessors, (15921), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15921 transitions. [2021-06-05 15:08:42,575 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15921 transitions. Word has length 23 [2021-06-05 15:08:42,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:42,575 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15921 transitions. [2021-06-05 15:08:42,575 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:42,575 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15921 transitions. [2021-06-05 15:08:42,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:42,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:42,580 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:42,780 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable693,316 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:42,780 INFO L430 AbstractCegarLoop]: === Iteration 317 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:42,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:42,780 INFO L82 PathProgramCache]: Analyzing trace with hash 524876187, now seen corresponding path program 162 times [2021-06-05 15:08:42,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:42,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491939228] [2021-06-05 15:08:42,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:42,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:42,879 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:42,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491939228] [2021-06-05 15:08:42,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491939228] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:42,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [219131254] [2021-06-05 15:08:42,879 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 317 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:42,904 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:42,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:42,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:08:42,905 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:42,984 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:42,984 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:08:42,985 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:42,992 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:42,992 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:42,993 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 15:08:43,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:43,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [219131254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,054 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:43,054 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:43,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [825517263] [2021-06-05 15:08:43,054 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:43,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:43,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:43,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:43,054 INFO L87 Difference]: Start difference. First operand 3802 states and 15921 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:43,409 INFO L93 Difference]: Finished difference Result 4038 states and 16829 transitions. [2021-06-05 15:08:43,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:43,409 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:43,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:43,416 INFO L225 Difference]: With dead ends: 4038 [2021-06-05 15:08:43,416 INFO L226 Difference]: Without dead ends: 4010 [2021-06-05 15:08:43,417 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 335.5ms TimeCoverageRelationStatistics Valid=99, Invalid=501, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:43,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4010 states. [2021-06-05 15:08:43,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4010 to 3795. [2021-06-05 15:08:43,456 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3795 states, 3794 states have (on average 4.1892461781760675) internal successors, (15894), 3794 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3795 states to 3795 states and 15894 transitions. [2021-06-05 15:08:43,464 INFO L78 Accepts]: Start accepts. Automaton has 3795 states and 15894 transitions. Word has length 23 [2021-06-05 15:08:43,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:43,464 INFO L482 AbstractCegarLoop]: Abstraction has 3795 states and 15894 transitions. [2021-06-05 15:08:43,464 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:43,465 INFO L276 IsEmpty]: Start isEmpty. Operand 3795 states and 15894 transitions. [2021-06-05 15:08:43,469 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:43,469 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:43,469 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:43,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 317 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable695 [2021-06-05 15:08:43,677 INFO L430 AbstractCegarLoop]: === Iteration 318 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:43,677 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:43,677 INFO L82 PathProgramCache]: Analyzing trace with hash -360922093, now seen corresponding path program 163 times [2021-06-05 15:08:43,677 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:43,677 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714162969] [2021-06-05 15:08:43,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:43,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:43,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:43,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714162969] [2021-06-05 15:08:43,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714162969] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300613270] [2021-06-05 15:08:43,764 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 318 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:43,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:43,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:43,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:43,881 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:43,882 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:43,883 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:43,890 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:43,891 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:43,891 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:43,952 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:43,952 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300613270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:43,952 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:43,952 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:43,952 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860400047] [2021-06-05 15:08:43,952 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:43,952 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:43,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:43,953 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:43,953 INFO L87 Difference]: Start difference. First operand 3795 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:44,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:44,314 INFO L93 Difference]: Finished difference Result 4204 states and 17490 transitions. [2021-06-05 15:08:44,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:08:44,314 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:44,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:44,322 INFO L225 Difference]: With dead ends: 4204 [2021-06-05 15:08:44,322 INFO L226 Difference]: Without dead ends: 4170 [2021-06-05 15:08:44,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 345.5ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:44,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4170 states. [2021-06-05 15:08:44,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4170 to 3792. [2021-06-05 15:08:44,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 15:08:44,371 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 15:08:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:44,371 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 15:08:44,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:44,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 15:08:44,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:44,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:44,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:44,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 318 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable696 [2021-06-05 15:08:44,577 INFO L430 AbstractCegarLoop]: === Iteration 319 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:44,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:44,577 INFO L82 PathProgramCache]: Analyzing trace with hash -545976375, now seen corresponding path program 164 times [2021-06-05 15:08:44,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:44,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044256662] [2021-06-05 15:08:44,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:44,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:44,670 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:44,670 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:44,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044256662] [2021-06-05 15:08:44,670 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2044256662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:44,670 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226338928] [2021-06-05 15:08:44,670 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 319 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:44,694 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:44,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:44,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:44,695 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:44,758 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:44,759 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:44,760 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:44,768 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:44,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:44,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:44,870 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226338928] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:44,870 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:44,870 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:44,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990325023] [2021-06-05 15:08:44,871 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:44,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:44,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:44,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:44,871 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:45,452 INFO L93 Difference]: Finished difference Result 4133 states and 17209 transitions. [2021-06-05 15:08:45,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:08:45,452 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:45,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:45,459 INFO L225 Difference]: With dead ends: 4133 [2021-06-05 15:08:45,459 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 15:08:45,459 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 489.3ms TimeCoverageRelationStatistics Valid=146, Invalid=610, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:45,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 15:08:45,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3801. [2021-06-05 15:08:45,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 4.1889473684210525) internal successors, (15918), 3800 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 15918 transitions. [2021-06-05 15:08:45,508 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 15918 transitions. Word has length 23 [2021-06-05 15:08:45,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:45,508 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 15918 transitions. [2021-06-05 15:08:45,508 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:45,508 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 15918 transitions. [2021-06-05 15:08:45,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:45,513 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:45,513 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:45,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 319 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable698 [2021-06-05 15:08:45,713 INFO L430 AbstractCegarLoop]: === Iteration 320 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:45,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:45,713 INFO L82 PathProgramCache]: Analyzing trace with hash -1587552443, now seen corresponding path program 165 times [2021-06-05 15:08:45,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:45,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [900304870] [2021-06-05 15:08:45,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:45,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:45,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:45,807 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:45,807 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [900304870] [2021-06-05 15:08:45,808 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [900304870] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:45,808 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687831594] [2021-06-05 15:08:45,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 320 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:45,832 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:45,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:45,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:08:45,833 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:45,895 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:45,895 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:08:45,900 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:45,901 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:08:45,901 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:45,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:45,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:45,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 15:08:45,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:45,989 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [687831594] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:45,990 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:45,990 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:45,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383320494] [2021-06-05 15:08:45,990 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:45,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:45,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:45,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:45,990 INFO L87 Difference]: Start difference. First operand 3801 states and 15918 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:46,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:46,518 INFO L93 Difference]: Finished difference Result 4050 states and 16875 transitions. [2021-06-05 15:08:46,518 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:08:46,518 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:46,518 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:46,525 INFO L225 Difference]: With dead ends: 4050 [2021-06-05 15:08:46,525 INFO L226 Difference]: Without dead ends: 4022 [2021-06-05 15:08:46,526 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 370.0ms TimeCoverageRelationStatistics Valid=106, Invalid=596, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:46,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4022 states. [2021-06-05 15:08:46,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4022 to 3794. [2021-06-05 15:08:46,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 15:08:46,574 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 15:08:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:46,574 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 15:08:46,574 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:46,574 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 15:08:46,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:46,579 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:46,579 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:46,779 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 320 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable700 [2021-06-05 15:08:46,779 INFO L430 AbstractCegarLoop]: === Iteration 321 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:46,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:46,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1874673795, now seen corresponding path program 166 times [2021-06-05 15:08:46,780 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:46,780 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [522651357] [2021-06-05 15:08:46,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:46,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:46,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:46,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [522651357] [2021-06-05 15:08:46,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [522651357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:46,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [928472200] [2021-06-05 15:08:46,872 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 321 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:46,896 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:46,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:46,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:46,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:46,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:46,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:46,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,970 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:46,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:46,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:47,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:47,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [928472200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:47,067 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:47,067 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:47,067 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591923175] [2021-06-05 15:08:47,067 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:47,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:47,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:47,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:47,067 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:47,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:47,584 INFO L93 Difference]: Finished difference Result 4044 states and 16847 transitions. [2021-06-05 15:08:47,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:08:47,585 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:47,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:47,591 INFO L225 Difference]: With dead ends: 4044 [2021-06-05 15:08:47,591 INFO L226 Difference]: Without dead ends: 4018 [2021-06-05 15:08:47,592 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=171, Invalid=699, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:08:47,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-06-05 15:08:47,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3798. [2021-06-05 15:08:47,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:47,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 15:08:47,658 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 15:08:47,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:47,658 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 15:08:47,658 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:47,658 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 15:08:47,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:47,663 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:47,663 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:47,863 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable701,321 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:47,864 INFO L430 AbstractCegarLoop]: === Iteration 322 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:47,864 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:47,864 INFO L82 PathProgramCache]: Analyzing trace with hash 1927076115, now seen corresponding path program 167 times [2021-06-05 15:08:47,864 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:47,864 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585176191] [2021-06-05 15:08:47,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:47,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:47,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:47,957 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:47,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585176191] [2021-06-05 15:08:47,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1585176191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:47,957 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [768229710] [2021-06-05 15:08:47,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 322 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:47,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:47,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:47,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:47,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:48,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:48,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:48,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:48,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:48,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:48,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:48,157 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:48,157 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [768229710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:48,157 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:48,157 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:48,157 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006080986] [2021-06-05 15:08:48,158 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:48,158 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:48,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:48,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:48,158 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:48,636 INFO L93 Difference]: Finished difference Result 4052 states and 16882 transitions. [2021-06-05 15:08:48,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:08:48,636 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:48,636 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:48,643 INFO L225 Difference]: With dead ends: 4052 [2021-06-05 15:08:48,644 INFO L226 Difference]: Without dead ends: 4031 [2021-06-05 15:08:48,644 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 397.3ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:08:48,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4031 states. [2021-06-05 15:08:48,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4031 to 3794. [2021-06-05 15:08:48,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 15:08:48,692 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 15:08:48,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:48,692 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 15:08:48,692 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:48,692 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 15:08:48,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:48,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:48,697 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:48,898 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 322 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable703 [2021-06-05 15:08:48,898 INFO L430 AbstractCegarLoop]: === Iteration 323 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:48,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:48,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1433114925, now seen corresponding path program 168 times [2021-06-05 15:08:48,898 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:48,898 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145513706] [2021-06-05 15:08:48,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:48,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:48,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:48,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145513706] [2021-06-05 15:08:48,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145513706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:48,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248258685] [2021-06-05 15:08:48,995 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 323 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:49,019 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:08:49,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:49,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:49,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:49,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:49,085 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:49,086 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:49,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:49,095 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:49,095 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:49,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:49,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248258685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:49,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:49,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:49,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854906550] [2021-06-05 15:08:49,195 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:49,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:49,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:49,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:49,195 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:49,664 INFO L93 Difference]: Finished difference Result 4030 states and 16793 transitions. [2021-06-05 15:08:49,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:08:49,665 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:49,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:49,672 INFO L225 Difference]: With dead ends: 4030 [2021-06-05 15:08:49,672 INFO L226 Difference]: Without dead ends: 4005 [2021-06-05 15:08:49,672 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 482.3ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:49,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4005 states. [2021-06-05 15:08:49,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4005 to 3798. [2021-06-05 15:08:49,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 15:08:49,720 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 15:08:49,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:49,720 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 15:08:49,720 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:49,720 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 15:08:49,725 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:49,725 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:49,725 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:49,925 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable705,323 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:49,925 INFO L430 AbstractCegarLoop]: === Iteration 324 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:49,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:49,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1849159839, now seen corresponding path program 169 times [2021-06-05 15:08:49,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:49,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298539733] [2021-06-05 15:08:49,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:49,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:50,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:50,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:50,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298539733] [2021-06-05 15:08:50,023 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298539733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:50,023 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419138027] [2021-06-05 15:08:50,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 324 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:50,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:50,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:50,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:50,113 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:50,113 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:50,114 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:50,123 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:50,123 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:50,123 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:50,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:50,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419138027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:50,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:50,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:50,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691435233] [2021-06-05 15:08:50,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:50,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:50,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:50,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:50,245 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:50,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:50,727 INFO L93 Difference]: Finished difference Result 4039 states and 16830 transitions. [2021-06-05 15:08:50,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:08:50,727 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:50,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:50,734 INFO L225 Difference]: With dead ends: 4039 [2021-06-05 15:08:50,734 INFO L226 Difference]: Without dead ends: 4018 [2021-06-05 15:08:50,734 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 506.3ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:08:50,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4018 states. [2021-06-05 15:08:50,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4018 to 3792. [2021-06-05 15:08:50,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:50,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 15:08:50,781 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 15:08:50,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:50,782 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 15:08:50,782 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:50,782 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 15:08:50,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:50,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:50,787 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:50,987 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable707,324 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:50,987 INFO L430 AbstractCegarLoop]: === Iteration 325 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:50,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:50,987 INFO L82 PathProgramCache]: Analyzing trace with hash 131673669, now seen corresponding path program 170 times [2021-06-05 15:08:50,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:50,987 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512404918] [2021-06-05 15:08:50,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:50,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:51,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:51,073 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:51,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512404918] [2021-06-05 15:08:51,073 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512404918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:51,073 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1272996784] [2021-06-05 15:08:51,073 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 325 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:51,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:51,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:51,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:51,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:51,191 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:51,191 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:51,192 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:51,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:51,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:51,201 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:51,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:51,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1272996784] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:51,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:51,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:51,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351810144] [2021-06-05 15:08:51,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:51,262 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:51,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:51,262 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:51,262 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:51,786 INFO L93 Difference]: Finished difference Result 4359 states and 18104 transitions. [2021-06-05 15:08:51,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:08:51,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:51,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:51,794 INFO L225 Difference]: With dead ends: 4359 [2021-06-05 15:08:51,794 INFO L226 Difference]: Without dead ends: 4328 [2021-06-05 15:08:51,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 439.7ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:08:51,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4328 states. [2021-06-05 15:08:51,833 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4328 to 3796. [2021-06-05 15:08:51,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.190777338603426) internal successors, (15904), 3795 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,844 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15904 transitions. [2021-06-05 15:08:51,844 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15904 transitions. Word has length 23 [2021-06-05 15:08:51,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:51,844 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15904 transitions. [2021-06-05 15:08:51,845 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:51,845 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15904 transitions. [2021-06-05 15:08:51,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:51,849 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:51,849 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:52,050 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable709,325 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:52,050 INFO L430 AbstractCegarLoop]: === Iteration 326 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:52,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:52,050 INFO L82 PathProgramCache]: Analyzing trace with hash 1171909467, now seen corresponding path program 171 times [2021-06-05 15:08:52,050 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:52,050 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175243221] [2021-06-05 15:08:52,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:52,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:52,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:52,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175243221] [2021-06-05 15:08:52,141 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175243221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:52,141 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177058475] [2021-06-05 15:08:52,141 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 326 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:52,164 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:52,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:52,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:52,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:52,245 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:52,245 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:52,246 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:52,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:52,254 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:52,254 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:52,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:52,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177058475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:52,332 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:52,332 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:52,332 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829530141] [2021-06-05 15:08:52,332 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:52,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:52,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:52,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:52,333 INFO L87 Difference]: Start difference. First operand 3796 states and 15904 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:53,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:53,026 INFO L93 Difference]: Finished difference Result 4229 states and 17589 transitions. [2021-06-05 15:08:53,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:08:53,027 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:53,027 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:53,033 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 15:08:53,034 INFO L226 Difference]: Without dead ends: 4204 [2021-06-05 15:08:53,034 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 213 ImplicationChecksByTransitivity, 608.5ms TimeCoverageRelationStatistics Valid=190, Invalid=866, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:08:53,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4204 states. [2021-06-05 15:08:53,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4204 to 3800. [2021-06-05 15:08:53,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.190576467491445) internal successors, (15920), 3799 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:53,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15920 transitions. [2021-06-05 15:08:53,083 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15920 transitions. Word has length 23 [2021-06-05 15:08:53,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:53,083 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15920 transitions. [2021-06-05 15:08:53,083 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:53,083 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15920 transitions. [2021-06-05 15:08:53,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:53,088 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:53,088 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:53,288 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 326 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable711 [2021-06-05 15:08:53,288 INFO L430 AbstractCegarLoop]: === Iteration 327 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:53,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:53,288 INFO L82 PathProgramCache]: Analyzing trace with hash 159216935, now seen corresponding path program 172 times [2021-06-05 15:08:53,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:53,289 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [224069156] [2021-06-05 15:08:53,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:53,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:53,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:53,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [224069156] [2021-06-05 15:08:53,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [224069156] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:53,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [409511053] [2021-06-05 15:08:53,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 327 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:53,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:08:53,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:53,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:53,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:53,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:53,479 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:53,480 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:53,488 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:53,488 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:53,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:53,569 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:53,569 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [409511053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:53,569 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:53,569 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:53,569 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834082477] [2021-06-05 15:08:53,569 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:53,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:53,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:53,570 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:53,570 INFO L87 Difference]: Start difference. First operand 3800 states and 15920 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:54,198 INFO L93 Difference]: Finished difference Result 4273 states and 17756 transitions. [2021-06-05 15:08:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:08:54,198 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:54,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:54,206 INFO L225 Difference]: With dead ends: 4273 [2021-06-05 15:08:54,206 INFO L226 Difference]: Without dead ends: 4252 [2021-06-05 15:08:54,206 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 576.5ms TimeCoverageRelationStatistics Valid=157, Invalid=713, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:08:54,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4252 states. [2021-06-05 15:08:54,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4252 to 3792. [2021-06-05 15:08:54,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 15:08:54,255 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 15:08:54,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:54,255 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 15:08:54,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:54,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 15:08:54,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:54,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:54,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:54,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable713,327 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:54,460 INFO L430 AbstractCegarLoop]: === Iteration 328 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:54,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:54,460 INFO L82 PathProgramCache]: Analyzing trace with hash -1986304985, now seen corresponding path program 173 times [2021-06-05 15:08:54,460 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:54,460 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573549706] [2021-06-05 15:08:54,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:54,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:54,554 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:54,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573549706] [2021-06-05 15:08:54,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [573549706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:54,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [559066096] [2021-06-05 15:08:54,555 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 328 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:54,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:08:54,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:54,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:54,589 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:54,681 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:54,681 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:08:54,682 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:54,690 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:54,690 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:54,691 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:08:54,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:54,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [559066096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:54,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:54,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:54,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448801209] [2021-06-05 15:08:54,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:54,748 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:54,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:54,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:54,748 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:55,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:55,247 INFO L93 Difference]: Finished difference Result 4075 states and 16982 transitions. [2021-06-05 15:08:55,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:08:55,248 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:55,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:55,255 INFO L225 Difference]: With dead ends: 4075 [2021-06-05 15:08:55,255 INFO L226 Difference]: Without dead ends: 4053 [2021-06-05 15:08:55,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 407.5ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:08:55,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4053 states. [2021-06-05 15:08:55,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4053 to 3796. [2021-06-05 15:08:55,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.190777338603426) internal successors, (15904), 3795 states have internal predecessors, (15904), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:55,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15904 transitions. [2021-06-05 15:08:55,326 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15904 transitions. Word has length 23 [2021-06-05 15:08:55,327 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:55,327 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15904 transitions. [2021-06-05 15:08:55,327 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:55,327 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15904 transitions. [2021-06-05 15:08:55,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:55,331 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:55,331 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:55,532 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable715,328 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:55,532 INFO L430 AbstractCegarLoop]: === Iteration 329 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:55,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:55,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1400971033, now seen corresponding path program 174 times [2021-06-05 15:08:55,532 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:55,532 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888222330] [2021-06-05 15:08:55,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:55,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:55,614 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:55,614 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888222330] [2021-06-05 15:08:55,615 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888222330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,615 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074986583] [2021-06-05 15:08:55,615 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 329 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:55,639 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:08:55,639 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:55,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:08:55,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:55,725 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:08:55,744 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:08:55,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:08:55,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,757 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:55,757 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:55,757 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:08:55,834 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:55,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1074986583] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:55,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:55,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:08:55,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983735457] [2021-06-05 15:08:55,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:08:55,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:55,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:08:55,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:08:55,835 INFO L87 Difference]: Start difference. First operand 3796 states and 15904 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:56,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:56,391 INFO L93 Difference]: Finished difference Result 4077 states and 16978 transitions. [2021-06-05 15:08:56,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:08:56,391 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:56,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:56,398 INFO L225 Difference]: With dead ends: 4077 [2021-06-05 15:08:56,398 INFO L226 Difference]: Without dead ends: 4051 [2021-06-05 15:08:56,398 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 455.5ms TimeCoverageRelationStatistics Valid=168, Invalid=954, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:08:56,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4051 states. [2021-06-05 15:08:56,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4051 to 3800. [2021-06-05 15:08:56,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.190576467491445) internal successors, (15920), 3799 states have internal predecessors, (15920), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:56,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15920 transitions. [2021-06-05 15:08:56,449 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15920 transitions. Word has length 23 [2021-06-05 15:08:56,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:56,449 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15920 transitions. [2021-06-05 15:08:56,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:56,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15920 transitions. [2021-06-05 15:08:56,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:56,454 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:56,454 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:56,654 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable717,329 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:56,654 INFO L430 AbstractCegarLoop]: === Iteration 330 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:56,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:56,654 INFO L82 PathProgramCache]: Analyzing trace with hash 212595701, now seen corresponding path program 175 times [2021-06-05 15:08:56,655 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:56,655 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187548811] [2021-06-05 15:08:56,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:56,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:56,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:56,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187548811] [2021-06-05 15:08:56,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1187548811] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:56,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351296915] [2021-06-05 15:08:56,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 330 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:56,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:56,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:56,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:56,840 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:56,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:56,841 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:56,848 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:56,849 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:56,849 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:08:56,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:56,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351296915] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:56,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:56,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:56,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [573518402] [2021-06-05 15:08:56,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:56,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:56,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:56,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:56,926 INFO L87 Difference]: Start difference. First operand 3800 states and 15920 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:57,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:57,392 INFO L93 Difference]: Finished difference Result 4013 states and 16724 transitions. [2021-06-05 15:08:57,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:57,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:57,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:57,399 INFO L225 Difference]: With dead ends: 4013 [2021-06-05 15:08:57,399 INFO L226 Difference]: Without dead ends: 3992 [2021-06-05 15:08:57,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:57,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3992 states. [2021-06-05 15:08:57,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3992 to 3792. [2021-06-05 15:08:57,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.190451068319705) internal successors, (15886), 3791 states have internal predecessors, (15886), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:57,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15886 transitions. [2021-06-05 15:08:57,448 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15886 transitions. Word has length 23 [2021-06-05 15:08:57,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:57,448 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15886 transitions. [2021-06-05 15:08:57,448 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:57,448 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15886 transitions. [2021-06-05 15:08:57,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:57,453 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:57,453 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:57,653 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable721,330 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:57,654 INFO L430 AbstractCegarLoop]: === Iteration 331 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:57,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:57,654 INFO L82 PathProgramCache]: Analyzing trace with hash -343292505, now seen corresponding path program 176 times [2021-06-05 15:08:57,654 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:57,654 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456517454] [2021-06-05 15:08:57,654 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:57,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:57,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:57,744 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:57,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456517454] [2021-06-05 15:08:57,744 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1456517454] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:57,744 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113106204] [2021-06-05 15:08:57,744 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 331 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:57,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:08:57,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:57,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:57,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:57,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:57,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:57,837 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:57,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:57,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:57,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:57,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:57,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113106204] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:57,967 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:57,967 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:57,967 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613246122] [2021-06-05 15:08:57,967 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:57,967 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:57,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:57,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:57,968 INFO L87 Difference]: Start difference. First operand 3792 states and 15886 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:58,532 INFO L93 Difference]: Finished difference Result 4089 states and 17033 transitions. [2021-06-05 15:08:58,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:08:58,533 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:58,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:58,540 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 15:08:58,540 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 15:08:58,540 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 476.6ms TimeCoverageRelationStatistics Valid=143, Invalid=613, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:08:58,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 15:08:58,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3801. [2021-06-05 15:08:58,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3801 states, 3800 states have (on average 4.1889473684210525) internal successors, (15918), 3800 states have internal predecessors, (15918), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3801 states to 3801 states and 15918 transitions. [2021-06-05 15:08:58,590 INFO L78 Accepts]: Start accepts. Automaton has 3801 states and 15918 transitions. Word has length 23 [2021-06-05 15:08:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:58,590 INFO L482 AbstractCegarLoop]: Abstraction has 3801 states and 15918 transitions. [2021-06-05 15:08:58,590 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 3801 states and 15918 transitions. [2021-06-05 15:08:58,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:58,595 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:58,595 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:58,795 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 331 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable723 [2021-06-05 15:08:58,795 INFO L430 AbstractCegarLoop]: === Iteration 332 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:58,795 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:58,795 INFO L82 PathProgramCache]: Analyzing trace with hash -1384868573, now seen corresponding path program 177 times [2021-06-05 15:08:58,795 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:58,795 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578639509] [2021-06-05 15:08:58,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:58,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:58,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:58,886 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:58,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578639509] [2021-06-05 15:08:58,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578639509] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:58,886 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [943345430] [2021-06-05 15:08:58,886 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 332 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:58,910 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:08:58,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:08:58,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:08:58,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:08:58,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:58,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:08:58,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:08:58,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:08:58,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:08:59,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:59,089 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [943345430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:59,089 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:08:59,089 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:08:59,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1753228878] [2021-06-05 15:08:59,090 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:08:59,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:08:59,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:08:59,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:08:59,090 INFO L87 Difference]: Start difference. First operand 3801 states and 15918 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:59,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:08:59,644 INFO L93 Difference]: Finished difference Result 4036 states and 16822 transitions. [2021-06-05 15:08:59,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:08:59,645 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:08:59,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:08:59,651 INFO L225 Difference]: With dead ends: 4036 [2021-06-05 15:08:59,652 INFO L226 Difference]: Without dead ends: 4008 [2021-06-05 15:08:59,652 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 459.8ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:08:59,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4008 states. [2021-06-05 15:08:59,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4008 to 3794. [2021-06-05 15:08:59,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:59,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 15:08:59,700 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 15:08:59,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:08:59,700 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 15:08:59,700 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:08:59,700 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 15:08:59,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:08:59,705 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:08:59,705 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:08:59,905 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable725,332 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:08:59,905 INFO L430 AbstractCegarLoop]: === Iteration 333 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:08:59,905 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:08:59,905 INFO L82 PathProgramCache]: Analyzing trace with hash -1671989925, now seen corresponding path program 178 times [2021-06-05 15:08:59,905 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:08:59,905 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [863935266] [2021-06-05 15:08:59,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:08:59,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:08:59,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:08:59,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:08:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [863935266] [2021-06-05 15:08:59,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [863935266] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:08:59,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1861465393] [2021-06-05 15:08:59,994 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 333 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:00,018 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:00,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:00,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:00,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:00,085 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:00,086 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:00,087 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:00,095 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:00,096 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:00,096 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:00,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:00,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1861465393] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:00,191 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:00,191 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:00,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954107305] [2021-06-05 15:09:00,192 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:00,192 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:00,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:00,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:00,192 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:00,702 INFO L93 Difference]: Finished difference Result 4000 states and 16671 transitions. [2021-06-05 15:09:00,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:09:00,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:00,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:00,709 INFO L225 Difference]: With dead ends: 4000 [2021-06-05 15:09:00,709 INFO L226 Difference]: Without dead ends: 3974 [2021-06-05 15:09:00,709 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 459.4ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:00,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3974 states. [2021-06-05 15:09:00,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3974 to 3798. [2021-06-05 15:09:00,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 15:09:00,758 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 15:09:00,758 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:00,758 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 15:09:00,758 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:00,758 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 15:09:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:00,763 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:00,763 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:00,963 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 333 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable727 [2021-06-05 15:09:00,963 INFO L430 AbstractCegarLoop]: === Iteration 334 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:00,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:00,963 INFO L82 PathProgramCache]: Analyzing trace with hash 2129759985, now seen corresponding path program 179 times [2021-06-05 15:09:00,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:00,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947700855] [2021-06-05 15:09:00,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:00,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:01,051 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,052 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:01,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947700855] [2021-06-05 15:09:01,052 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [947700855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,052 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605459913] [2021-06-05 15:09:01,052 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 334 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:01,076 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:01,076 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:01,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:01,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:01,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:01,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:01,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:01,153 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:01,153 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:01,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:01,250 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605459913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:01,250 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:01,250 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:01,250 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [957626967] [2021-06-05 15:09:01,250 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:01,250 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:01,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:01,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:01,251 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:01,671 INFO L93 Difference]: Finished difference Result 3986 states and 16616 transitions. [2021-06-05 15:09:01,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:09:01,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:01,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:01,678 INFO L225 Difference]: With dead ends: 3986 [2021-06-05 15:09:01,678 INFO L226 Difference]: Without dead ends: 3965 [2021-06-05 15:09:01,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 389.5ms TimeCoverageRelationStatistics Valid=118, Invalid=482, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:01,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3965 states. [2021-06-05 15:09:01,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3965 to 3794. [2021-06-05 15:09:01,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190350645926707) internal successors, (15894), 3793 states have internal predecessors, (15894), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15894 transitions. [2021-06-05 15:09:01,726 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15894 transitions. Word has length 23 [2021-06-05 15:09:01,726 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:01,727 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15894 transitions. [2021-06-05 15:09:01,727 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:01,727 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15894 transitions. [2021-06-05 15:09:01,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:01,731 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:01,732 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:01,932 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable729,334 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:01,932 INFO L430 AbstractCegarLoop]: === Iteration 335 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:01,932 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:01,932 INFO L82 PathProgramCache]: Analyzing trace with hash -1230431055, now seen corresponding path program 180 times [2021-06-05 15:09:01,932 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:01,932 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2097297511] [2021-06-05 15:09:01,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:01,934 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:02,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:02,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2097297511] [2021-06-05 15:09:02,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2097297511] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:02,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589351244] [2021-06-05 15:09:02,025 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 335 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:02,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:02,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:02,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:02,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:02,118 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:02,124 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:02,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 15:09:02,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:02,133 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:02,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:02,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:32 [2021-06-05 15:09:02,219 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:02,219 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589351244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:02,219 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:02,219 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:02,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167027636] [2021-06-05 15:09:02,220 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:02,220 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:02,220 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:02,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:02,220 INFO L87 Difference]: Start difference. First operand 3794 states and 15894 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:02,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:02,563 INFO L93 Difference]: Finished difference Result 3923 states and 16367 transitions. [2021-06-05 15:09:02,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:09:02,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:02,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:02,570 INFO L225 Difference]: With dead ends: 3923 [2021-06-05 15:09:02,570 INFO L226 Difference]: Without dead ends: 3898 [2021-06-05 15:09:02,570 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 311.3ms TimeCoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:09:02,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3898 states. [2021-06-05 15:09:02,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3898 to 3798. [2021-06-05 15:09:02,610 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190150118514617) internal successors, (15910), 3797 states have internal predecessors, (15910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:02,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15910 transitions. [2021-06-05 15:09:02,618 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15910 transitions. Word has length 23 [2021-06-05 15:09:02,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:02,618 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15910 transitions. [2021-06-05 15:09:02,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:02,618 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15910 transitions. [2021-06-05 15:09:02,623 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:02,623 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:02,623 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:02,823 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 335 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable731 [2021-06-05 15:09:02,823 INFO L430 AbstractCegarLoop]: === Iteration 336 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:02,823 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:02,823 INFO L82 PathProgramCache]: Analyzing trace with hash 2051843709, now seen corresponding path program 181 times [2021-06-05 15:09:02,824 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:02,824 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [321355376] [2021-06-05 15:09:02,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:02,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:02,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:02,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:02,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [321355376] [2021-06-05 15:09:02,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [321355376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:02,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [543501310] [2021-06-05 15:09:02,917 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 336 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:02,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:02,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:02,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:03,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:03,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:03,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:03,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:03,019 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:03,019 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:03,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:03,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [543501310] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:03,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:03,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:03,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1350483191] [2021-06-05 15:09:03,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:03,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:03,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:03,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:03,140 INFO L87 Difference]: Start difference. First operand 3798 states and 15910 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:03,625 INFO L93 Difference]: Finished difference Result 3973 states and 16564 transitions. [2021-06-05 15:09:03,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:09:03,625 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:03,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:03,632 INFO L225 Difference]: With dead ends: 3973 [2021-06-05 15:09:03,632 INFO L226 Difference]: Without dead ends: 3952 [2021-06-05 15:09:03,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 478.8ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:03,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 3952 states. [2021-06-05 15:09:03,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 3952 to 3790. [2021-06-05 15:09:03,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.1902876748482445) internal successors, (15877), 3789 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15877 transitions. [2021-06-05 15:09:03,681 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15877 transitions. Word has length 23 [2021-06-05 15:09:03,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:03,681 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15877 transitions. [2021-06-05 15:09:03,681 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:03,681 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15877 transitions. [2021-06-05 15:09:03,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:03,686 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:03,686 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:03,886 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable732,336 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:03,886 INFO L430 AbstractCegarLoop]: === Iteration 337 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:03,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:03,886 INFO L82 PathProgramCache]: Analyzing trace with hash 1035728603, now seen corresponding path program 182 times [2021-06-05 15:09:03,886 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:03,886 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110487209] [2021-06-05 15:09:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:03,888 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:03,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:03,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110487209] [2021-06-05 15:09:03,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110487209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:03,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61835629] [2021-06-05 15:09:03,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 337 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:03,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:03,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:03,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:03,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:04,081 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:04,081 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:04,082 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:04,090 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:04,091 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:04,091 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:04,149 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:04,150 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61835629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:04,150 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:04,150 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:04,150 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765623431] [2021-06-05 15:09:04,150 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:04,150 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:04,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:04,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:04,150 INFO L87 Difference]: Start difference. First operand 3790 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:04,714 INFO L93 Difference]: Finished difference Result 4093 states and 17042 transitions. [2021-06-05 15:09:04,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:04,715 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:04,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:04,722 INFO L225 Difference]: With dead ends: 4093 [2021-06-05 15:09:04,722 INFO L226 Difference]: Without dead ends: 4071 [2021-06-05 15:09:04,722 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 420.9ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:04,725 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4071 states. [2021-06-05 15:09:04,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4071 to 3798. [2021-06-05 15:09:04,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190413484329734) internal successors, (15911), 3797 states have internal predecessors, (15911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15911 transitions. [2021-06-05 15:09:04,770 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15911 transitions. Word has length 23 [2021-06-05 15:09:04,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:04,770 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15911 transitions. [2021-06-05 15:09:04,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:04,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15911 transitions. [2021-06-05 15:09:04,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:04,775 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:04,775 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:04,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 337 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable734 [2021-06-05 15:09:04,976 INFO L430 AbstractCegarLoop]: === Iteration 338 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:04,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:04,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1621062555, now seen corresponding path program 183 times [2021-06-05 15:09:04,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:04,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1474801844] [2021-06-05 15:09:04,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:04,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:05,059 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:05,059 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:05,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1474801844] [2021-06-05 15:09:05,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1474801844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:05,059 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248076175] [2021-06-05 15:09:05,059 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 338 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:05,084 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:05,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:05,084 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:05,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:05,159 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:05,159 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:09:05,164 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:05,164 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:09:05,165 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:05,172 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:05,173 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:05,173 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:25 [2021-06-05 15:09:05,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:05,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248076175] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:05,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:05,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:05,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30935126] [2021-06-05 15:09:05,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:05,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:05,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:05,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:05,231 INFO L87 Difference]: Start difference. First operand 3798 states and 15911 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:05,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:05,702 INFO L93 Difference]: Finished difference Result 4064 states and 16898 transitions. [2021-06-05 15:09:05,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:09:05,703 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:05,710 INFO L225 Difference]: With dead ends: 4064 [2021-06-05 15:09:05,710 INFO L226 Difference]: Without dead ends: 4038 [2021-06-05 15:09:05,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 347.6ms TimeCoverageRelationStatistics Valid=143, Invalid=727, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:05,713 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4038 states. [2021-06-05 15:09:05,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4038 to 3802. [2021-06-05 15:09:05,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.190213101815312) internal successors, (15927), 3801 states have internal predecessors, (15927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:05,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15927 transitions. [2021-06-05 15:09:05,757 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15927 transitions. Word has length 23 [2021-06-05 15:09:05,757 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:05,757 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15927 transitions. [2021-06-05 15:09:05,757 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:05,757 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15927 transitions. [2021-06-05 15:09:05,762 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:05,762 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:05,762 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:05,962 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 338 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable736 [2021-06-05 15:09:05,962 INFO L430 AbstractCegarLoop]: === Iteration 339 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:05,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:05,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1060338007, now seen corresponding path program 184 times [2021-06-05 15:09:05,963 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:05,963 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108255165] [2021-06-05 15:09:05,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:06,045 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:06,045 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:06,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108255165] [2021-06-05 15:09:06,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108255165] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:06,045 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911696209] [2021-06-05 15:09:06,046 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 339 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:06,069 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:06,070 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:06,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:06,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:06,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:06,147 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:06,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:06,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:06,156 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:06,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:06,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:06,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911696209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:06,232 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:06,232 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:06,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262708864] [2021-06-05 15:09:06,232 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:06,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:06,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:06,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:06,232 INFO L87 Difference]: Start difference. First operand 3802 states and 15927 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:06,759 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:06,759 INFO L93 Difference]: Finished difference Result 4028 states and 16778 transitions. [2021-06-05 15:09:06,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:06,759 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:06,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:06,766 INFO L225 Difference]: With dead ends: 4028 [2021-06-05 15:09:06,766 INFO L226 Difference]: Without dead ends: 4007 [2021-06-05 15:09:06,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 465.8ms TimeCoverageRelationStatistics Valid=158, Invalid=712, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:06,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4007 states. [2021-06-05 15:09:06,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4007 to 3794. [2021-06-05 15:09:06,810 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190087002372792) internal successors, (15893), 3793 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:06,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15893 transitions. [2021-06-05 15:09:06,819 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15893 transitions. Word has length 23 [2021-06-05 15:09:06,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:06,819 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15893 transitions. [2021-06-05 15:09:06,819 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:06,819 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15893 transitions. [2021-06-05 15:09:06,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:06,824 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:06,824 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:07,024 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable737,339 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:07,024 INFO L430 AbstractCegarLoop]: === Iteration 340 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:07,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:07,025 INFO L82 PathProgramCache]: Analyzing trace with hash -499776783, now seen corresponding path program 185 times [2021-06-05 15:09:07,025 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:07,025 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982306298] [2021-06-05 15:09:07,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:07,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:07,109 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:07,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982306298] [2021-06-05 15:09:07,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1982306298] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:07,109 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2063770709] [2021-06-05 15:09:07,109 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 340 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:07,134 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:07,134 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:07,134 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:07,135 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:07,227 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:07,228 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:07,229 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:07,237 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:07,238 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:07,238 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:07,295 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:07,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2063770709] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:07,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:07,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:07,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [726278779] [2021-06-05 15:09:07,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:07,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:07,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:07,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:07,296 INFO L87 Difference]: Start difference. First operand 3794 states and 15893 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:07,823 INFO L93 Difference]: Finished difference Result 4036 states and 16825 transitions. [2021-06-05 15:09:07,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:09:07,824 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:07,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:07,831 INFO L225 Difference]: With dead ends: 4036 [2021-06-05 15:09:07,831 INFO L226 Difference]: Without dead ends: 4013 [2021-06-05 15:09:07,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 136 ImplicationChecksByTransitivity, 363.2ms TimeCoverageRelationStatistics Valid=122, Invalid=580, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:07,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4013 states. [2021-06-05 15:09:07,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4013 to 3790. [2021-06-05 15:09:07,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.1902876748482445) internal successors, (15877), 3789 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15877 transitions. [2021-06-05 15:09:07,880 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15877 transitions. Word has length 23 [2021-06-05 15:09:07,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:07,880 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15877 transitions. [2021-06-05 15:09:07,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:07,881 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15877 transitions. [2021-06-05 15:09:07,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:07,885 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:07,885 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:08,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable739,340 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:08,086 INFO L430 AbstractCegarLoop]: === Iteration 341 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:08,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:08,086 INFO L82 PathProgramCache]: Analyzing trace with hash 172040369, now seen corresponding path program 186 times [2021-06-05 15:09:08,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:08,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049206135] [2021-06-05 15:09:08,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:08,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:08,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:08,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:08,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049206135] [2021-06-05 15:09:08,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049206135] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:08,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502114751] [2021-06-05 15:09:08,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 341 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:08,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:08,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:08,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:08,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:08,283 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:08,283 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:08,284 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:08,292 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:08,292 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:08,292 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:08,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:08,372 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502114751] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:08,372 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:08,372 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:08,372 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275028621] [2021-06-05 15:09:08,372 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:08,372 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:08,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:08,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:08,372 INFO L87 Difference]: Start difference. First operand 3790 states and 15877 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:08,882 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:08,883 INFO L93 Difference]: Finished difference Result 4207 states and 17506 transitions. [2021-06-05 15:09:08,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:08,883 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:08,883 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:08,890 INFO L225 Difference]: With dead ends: 4207 [2021-06-05 15:09:08,890 INFO L226 Difference]: Without dead ends: 4185 [2021-06-05 15:09:08,890 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 403.6ms TimeCoverageRelationStatistics Valid=135, Invalid=621, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:09:08,894 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4185 states. [2021-06-05 15:09:08,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4185 to 3798. [2021-06-05 15:09:08,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3798 states, 3797 states have (on average 4.190413484329734) internal successors, (15911), 3797 states have internal predecessors, (15911), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:08,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3798 states to 3798 states and 15911 transitions. [2021-06-05 15:09:08,939 INFO L78 Accepts]: Start accepts. Automaton has 3798 states and 15911 transitions. Word has length 23 [2021-06-05 15:09:08,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:08,939 INFO L482 AbstractCegarLoop]: Abstraction has 3798 states and 15911 transitions. [2021-06-05 15:09:08,939 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:08,939 INFO L276 IsEmpty]: Start isEmpty. Operand 3798 states and 15911 transitions. [2021-06-05 15:09:08,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:08,944 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:08,944 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:09,145 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 341 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable741 [2021-06-05 15:09:09,145 INFO L430 AbstractCegarLoop]: === Iteration 342 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:09,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:09,145 INFO L82 PathProgramCache]: Analyzing trace with hash 685567221, now seen corresponding path program 187 times [2021-06-05 15:09:09,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:09,145 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199948043] [2021-06-05 15:09:09,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:09,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:09,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:09,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:09,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199948043] [2021-06-05 15:09:09,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199948043] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:09,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [332887125] [2021-06-05 15:09:09,232 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 342 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:09,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:09,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:09,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:09,333 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:09,333 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:09,334 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:09,342 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:09,342 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:09,342 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:09,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:09,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [332887125] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:09,417 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:09,417 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:09,417 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44995136] [2021-06-05 15:09:09,417 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:09,417 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:09,418 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:09,418 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:09,418 INFO L87 Difference]: Start difference. First operand 3798 states and 15911 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:10,064 INFO L93 Difference]: Finished difference Result 4110 states and 17112 transitions. [2021-06-05 15:09:10,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:10,064 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:10,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:10,071 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 15:09:10,071 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 15:09:10,071 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 598.1ms TimeCoverageRelationStatistics Valid=196, Invalid=796, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:09:10,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 15:09:10,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3802. [2021-06-05 15:09:10,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3802 states, 3801 states have (on average 4.190213101815312) internal successors, (15927), 3801 states have internal predecessors, (15927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3802 states to 3802 states and 15927 transitions. [2021-06-05 15:09:10,122 INFO L78 Accepts]: Start accepts. Automaton has 3802 states and 15927 transitions. Word has length 23 [2021-06-05 15:09:10,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:10,122 INFO L482 AbstractCegarLoop]: Abstraction has 3802 states and 15927 transitions. [2021-06-05 15:09:10,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:10,122 INFO L276 IsEmpty]: Start isEmpty. Operand 3802 states and 15927 transitions. [2021-06-05 15:09:10,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:10,127 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:10,127 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:10,327 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable743,342 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:10,327 INFO L430 AbstractCegarLoop]: === Iteration 343 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:10,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:10,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1761278377, now seen corresponding path program 188 times [2021-06-05 15:09:10,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:10,328 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1433892704] [2021-06-05 15:09:10,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:10,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:10,413 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:10,413 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:10,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1433892704] [2021-06-05 15:09:10,413 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1433892704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:10,413 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905706875] [2021-06-05 15:09:10,413 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 343 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:10,437 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:10,437 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:10,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:10,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:10,514 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:10,514 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:10,515 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:10,523 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:10,524 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:10,524 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:10,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:10,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905706875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:10,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:10,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:10,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844239402] [2021-06-05 15:09:10,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:10,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:10,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:10,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:10,599 INFO L87 Difference]: Start difference. First operand 3802 states and 15927 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:11,193 INFO L93 Difference]: Finished difference Result 4079 states and 16992 transitions. [2021-06-05 15:09:11,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:09:11,193 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:11,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:11,200 INFO L225 Difference]: With dead ends: 4079 [2021-06-05 15:09:11,200 INFO L226 Difference]: Without dead ends: 4058 [2021-06-05 15:09:11,200 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 191 ImplicationChecksByTransitivity, 554.9ms TimeCoverageRelationStatistics Valid=179, Invalid=751, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:11,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4058 states. [2021-06-05 15:09:11,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4058 to 3794. [2021-06-05 15:09:11,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.190087002372792) internal successors, (15893), 3793 states have internal predecessors, (15893), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15893 transitions. [2021-06-05 15:09:11,248 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15893 transitions. Word has length 23 [2021-06-05 15:09:11,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:11,248 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15893 transitions. [2021-06-05 15:09:11,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:11,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15893 transitions. [2021-06-05 15:09:11,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:11,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:11,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:11,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 343 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable745 [2021-06-05 15:09:11,453 INFO L430 AbstractCegarLoop]: === Iteration 344 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:11,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:11,454 INFO L82 PathProgramCache]: Analyzing trace with hash 1932093309, now seen corresponding path program 189 times [2021-06-05 15:09:11,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:11,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67152074] [2021-06-05 15:09:11,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:11,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:11,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:11,534 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:11,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67152074] [2021-06-05 15:09:11,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67152074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:11,534 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584648690] [2021-06-05 15:09:11,534 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 344 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:11,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:11,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:11,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:11,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:11,693 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:09:11,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 49 treesize of output 65 [2021-06-05 15:09:11,697 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:11,709 INFO L628 ElimStorePlain]: treesize reduction 39, result has 26.4 percent of original size [2021-06-05 15:09:11,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:11,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:49, output treesize:14 [2021-06-05 15:09:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:11,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584648690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:11,747 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:11,747 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:11,747 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64897885] [2021-06-05 15:09:11,747 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:11,747 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:11,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:11,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:11,747 INFO L87 Difference]: Start difference. First operand 3794 states and 15893 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:12,472 INFO L93 Difference]: Finished difference Result 4142 states and 17255 transitions. [2021-06-05 15:09:12,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:09:12,472 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:12,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:12,479 INFO L225 Difference]: With dead ends: 4142 [2021-06-05 15:09:12,479 INFO L226 Difference]: Without dead ends: 4119 [2021-06-05 15:09:12,480 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 451.8ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:09:12,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-06-05 15:09:12,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3788. [2021-06-05 15:09:12,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.190388170055453) internal successors, (15869), 3787 states have internal predecessors, (15869), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15869 transitions. [2021-06-05 15:09:12,528 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15869 transitions. Word has length 23 [2021-06-05 15:09:12,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:12,528 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15869 transitions. [2021-06-05 15:09:12,528 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:12,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15869 transitions. [2021-06-05 15:09:12,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:12,533 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:12,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:12,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable747,344 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:12,733 INFO L430 AbstractCegarLoop]: === Iteration 345 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:12,734 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:12,734 INFO L82 PathProgramCache]: Analyzing trace with hash 695325603, now seen corresponding path program 190 times [2021-06-05 15:09:12,734 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:12,734 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1985386099] [2021-06-05 15:09:12,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:12,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:12,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:12,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:12,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1985386099] [2021-06-05 15:09:12,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1985386099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:12,818 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841222528] [2021-06-05 15:09:12,818 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 345 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:12,842 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:12,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:12,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:12,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:12,931 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:12,932 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:12,933 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:12,940 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:12,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:12,941 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:12,997 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:12,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [841222528] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:12,997 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:12,997 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:12,997 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665898785] [2021-06-05 15:09:12,997 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:12,997 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:12,998 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:12,998 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:12,998 INFO L87 Difference]: Start difference. First operand 3788 states and 15869 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:13,561 INFO L93 Difference]: Finished difference Result 4480 states and 18590 transitions. [2021-06-05 15:09:13,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:09:13,562 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:13,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:13,569 INFO L225 Difference]: With dead ends: 4480 [2021-06-05 15:09:13,569 INFO L226 Difference]: Without dead ends: 4458 [2021-06-05 15:09:13,569 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 447.5ms TimeCoverageRelationStatistics Valid=164, Invalid=706, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:13,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4458 states. [2021-06-05 15:09:13,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4458 to 3796. [2021-06-05 15:09:13,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.189723320158103) internal successors, (15900), 3795 states have internal predecessors, (15900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15900 transitions. [2021-06-05 15:09:13,621 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15900 transitions. Word has length 23 [2021-06-05 15:09:13,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:13,621 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15900 transitions. [2021-06-05 15:09:13,621 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:13,621 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15900 transitions. [2021-06-05 15:09:13,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:13,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:13,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:13,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 345 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable751 [2021-06-05 15:09:13,826 INFO L430 AbstractCegarLoop]: === Iteration 346 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:13,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:13,826 INFO L82 PathProgramCache]: Analyzing trace with hash 1208852455, now seen corresponding path program 191 times [2021-06-05 15:09:13,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:13,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70007147] [2021-06-05 15:09:13,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:13,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:13,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:13,916 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:13,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70007147] [2021-06-05 15:09:13,916 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70007147] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:13,916 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258687231] [2021-06-05 15:09:13,916 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 346 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:13,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:13,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:13,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:13,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:14,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:14,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:14,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:14,022 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:14,022 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:14,022 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:14,097 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:14,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258687231] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:14,097 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:14,097 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:14,097 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71600478] [2021-06-05 15:09:14,098 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:14,098 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:14,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:14,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:14,098 INFO L87 Difference]: Start difference. First operand 3796 states and 15900 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:14,946 INFO L93 Difference]: Finished difference Result 4349 states and 18055 transitions. [2021-06-05 15:09:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:09:14,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:14,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:14,954 INFO L225 Difference]: With dead ends: 4349 [2021-06-05 15:09:14,954 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 15:09:14,954 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=228, Invalid=894, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:09:14,958 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 15:09:14,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3800. [2021-06-05 15:09:14,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.189523558831271) internal successors, (15916), 3799 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:15,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15916 transitions. [2021-06-05 15:09:15,005 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15916 transitions. Word has length 23 [2021-06-05 15:09:15,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:15,005 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15916 transitions. [2021-06-05 15:09:15,005 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:15,006 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15916 transitions. [2021-06-05 15:09:15,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:15,010 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:15,011 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:15,211 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable753,346 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:15,211 INFO L430 AbstractCegarLoop]: === Iteration 347 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:15,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:15,211 INFO L82 PathProgramCache]: Analyzing trace with hash -2010403685, now seen corresponding path program 192 times [2021-06-05 15:09:15,211 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:15,211 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [656233246] [2021-06-05 15:09:15,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:15,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:15,300 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:15,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:15,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [656233246] [2021-06-05 15:09:15,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [656233246] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:15,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460520363] [2021-06-05 15:09:15,301 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 347 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:15,325 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:09:15,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:15,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:15,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:15,397 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:15,398 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:15,399 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:15,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:15,407 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:15,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:15,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:15,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [460520363] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:15,485 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:15,485 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:15,486 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017317746] [2021-06-05 15:09:15,486 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:15,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:15,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:15,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:15,486 INFO L87 Difference]: Start difference. First operand 3800 states and 15916 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:16,262 INFO L93 Difference]: Finished difference Result 4303 states and 17878 transitions. [2021-06-05 15:09:16,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:09:16,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:16,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:16,270 INFO L225 Difference]: With dead ends: 4303 [2021-06-05 15:09:16,270 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 15:09:16,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 582.8ms TimeCoverageRelationStatistics Valid=213, Invalid=843, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:09:16,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 15:09:16,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3792. [2021-06-05 15:09:16,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.189395937747296) internal successors, (15882), 3791 states have internal predecessors, (15882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15882 transitions. [2021-06-05 15:09:16,321 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15882 transitions. Word has length 23 [2021-06-05 15:09:16,321 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:16,322 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15882 transitions. [2021-06-05 15:09:16,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:16,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15882 transitions. [2021-06-05 15:09:16,326 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:16,326 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:16,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:16,527 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 347 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable755 [2021-06-05 15:09:16,527 INFO L430 AbstractCegarLoop]: === Iteration 348 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:16,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:16,527 INFO L82 PathProgramCache]: Analyzing trace with hash 1104833101, now seen corresponding path program 193 times [2021-06-05 15:09:16,527 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:16,527 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394963634] [2021-06-05 15:09:16,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:16,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:16,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:16,612 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394963634] [2021-06-05 15:09:16,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394963634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:16,612 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877986561] [2021-06-05 15:09:16,613 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 348 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:16,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:16,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:16,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:16,722 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:16,722 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:16,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:16,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:16,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:16,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:16,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:16,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1877986561] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:16,790 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:16,790 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:16,790 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860484729] [2021-06-05 15:09:16,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:16,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:16,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:16,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:16,791 INFO L87 Difference]: Start difference. First operand 3792 states and 15882 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:17,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:17,574 INFO L93 Difference]: Finished difference Result 4528 states and 18743 transitions. [2021-06-05 15:09:17,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:09:17,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:17,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:17,582 INFO L225 Difference]: With dead ends: 4528 [2021-06-05 15:09:17,582 INFO L226 Difference]: Without dead ends: 4497 [2021-06-05 15:09:17,582 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 514.1ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:09:17,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4497 states. [2021-06-05 15:09:17,624 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4497 to 3790. [2021-06-05 15:09:17,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3790 states, 3789 states have (on average 4.186064924782264) internal successors, (15861), 3789 states have internal predecessors, (15861), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:17,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3790 states to 3790 states and 15861 transitions. [2021-06-05 15:09:17,635 INFO L78 Accepts]: Start accepts. Automaton has 3790 states and 15861 transitions. Word has length 23 [2021-06-05 15:09:17,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:17,635 INFO L482 AbstractCegarLoop]: Abstraction has 3790 states and 15861 transitions. [2021-06-05 15:09:17,635 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:17,635 INFO L276 IsEmpty]: Start isEmpty. Operand 3790 states and 15861 transitions. [2021-06-05 15:09:17,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:17,640 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:17,640 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:17,841 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable757,348 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:17,841 INFO L430 AbstractCegarLoop]: === Iteration 349 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:17,841 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:17,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1692578423, now seen corresponding path program 194 times [2021-06-05 15:09:17,841 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:17,841 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889765573] [2021-06-05 15:09:17,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:17,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:17,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:17,931 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:17,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889765573] [2021-06-05 15:09:17,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [889765573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:17,931 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488369552] [2021-06-05 15:09:17,931 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 349 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:17,954 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:17,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:17,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:17,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:18,027 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:18,027 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:18,028 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:18,036 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:18,036 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:18,036 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:18,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:18,112 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488369552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:18,112 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:18,112 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:18,112 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513061067] [2021-06-05 15:09:18,113 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:18,113 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:18,113 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:18,113 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:18,113 INFO L87 Difference]: Start difference. First operand 3790 states and 15861 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:18,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:18,863 INFO L93 Difference]: Finished difference Result 4303 states and 17861 transitions. [2021-06-05 15:09:18,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:09:18,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:18,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:18,871 INFO L225 Difference]: With dead ends: 4303 [2021-06-05 15:09:18,871 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 15:09:18,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 634.9ms TimeCoverageRelationStatistics Valid=235, Invalid=887, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:09:18,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 15:09:18,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3794. [2021-06-05 15:09:18,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3794 states, 3793 states have (on average 4.18586870551015) internal successors, (15877), 3793 states have internal predecessors, (15877), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:18,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3794 states to 3794 states and 15877 transitions. [2021-06-05 15:09:18,922 INFO L78 Accepts]: Start accepts. Automaton has 3794 states and 15877 transitions. Word has length 23 [2021-06-05 15:09:18,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:18,922 INFO L482 AbstractCegarLoop]: Abstraction has 3794 states and 15877 transitions. [2021-06-05 15:09:18,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:18,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3794 states and 15877 transitions. [2021-06-05 15:09:18,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:18,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:18,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:19,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable759,349 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:19,127 INFO L430 AbstractCegarLoop]: === Iteration 350 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:19,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:19,128 INFO L82 PathProgramCache]: Analyzing trace with hash -1526677717, now seen corresponding path program 195 times [2021-06-05 15:09:19,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:19,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1843840867] [2021-06-05 15:09:19,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:19,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:19,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:19,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1843840867] [2021-06-05 15:09:19,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1843840867] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:19,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1449306652] [2021-06-05 15:09:19,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 350 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:19,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:19,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:19,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:19,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:19,320 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:19,339 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:19,339 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:09:19,341 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:19,352 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:19,352 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:19,352 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:09:19,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:19,412 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1449306652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:19,412 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:19,412 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:19,412 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656000421] [2021-06-05 15:09:19,412 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:19,412 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:19,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:19,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:19,412 INFO L87 Difference]: Start difference. First operand 3794 states and 15877 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:20,308 INFO L93 Difference]: Finished difference Result 4402 states and 18269 transitions. [2021-06-05 15:09:20,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:09:20,308 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:20,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:20,316 INFO L225 Difference]: With dead ends: 4402 [2021-06-05 15:09:20,316 INFO L226 Difference]: Without dead ends: 4381 [2021-06-05 15:09:20,316 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1407, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:09:20,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4381 states. [2021-06-05 15:09:20,358 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4381 to 3792. [2021-06-05 15:09:20,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3792 states, 3791 states have (on average 4.183065154312846) internal successors, (15858), 3791 states have internal predecessors, (15858), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3792 states to 3792 states and 15858 transitions. [2021-06-05 15:09:20,370 INFO L78 Accepts]: Start accepts. Automaton has 3792 states and 15858 transitions. Word has length 23 [2021-06-05 15:09:20,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:20,370 INFO L482 AbstractCegarLoop]: Abstraction has 3792 states and 15858 transitions. [2021-06-05 15:09:20,370 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:20,370 INFO L276 IsEmpty]: Start isEmpty. Operand 3792 states and 15858 transitions. [2021-06-05 15:09:20,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:20,375 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:20,375 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:20,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 350 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable761 [2021-06-05 15:09:20,591 INFO L430 AbstractCegarLoop]: === Iteration 351 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:20,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:20,591 INFO L82 PathProgramCache]: Analyzing trace with hash -365452487, now seen corresponding path program 196 times [2021-06-05 15:09:20,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:20,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744882529] [2021-06-05 15:09:20,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:20,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:20,673 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:20,674 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:20,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744882529] [2021-06-05 15:09:20,674 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744882529] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,674 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408670337] [2021-06-05 15:09:20,674 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 351 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:20,736 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:20,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:20,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:20,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:20,831 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:20,831 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:20,832 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,840 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:20,841 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:20,841 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:20,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:20,899 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [408670337] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:20,899 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:20,899 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:20,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532549668] [2021-06-05 15:09:20,899 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:20,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:20,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:20,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:20,899 INFO L87 Difference]: Start difference. First operand 3792 states and 15858 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:21,442 INFO L93 Difference]: Finished difference Result 4373 states and 18151 transitions. [2021-06-05 15:09:21,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:21,443 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:21,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:21,450 INFO L225 Difference]: With dead ends: 4373 [2021-06-05 15:09:21,450 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 15:09:21,450 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 400.6ms TimeCoverageRelationStatistics Valid=137, Invalid=675, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:21,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 15:09:21,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3800. [2021-06-05 15:09:21,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.183206106870229) internal successors, (15892), 3799 states have internal predecessors, (15892), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15892 transitions. [2021-06-05 15:09:21,499 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15892 transitions. Word has length 23 [2021-06-05 15:09:21,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:21,499 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15892 transitions. [2021-06-05 15:09:21,499 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:21,499 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15892 transitions. [2021-06-05 15:09:21,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:21,504 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:21,505 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:21,705 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 351 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable765 [2021-06-05 15:09:21,705 INFO L430 AbstractCegarLoop]: === Iteration 352 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:21,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:21,705 INFO L82 PathProgramCache]: Analyzing trace with hash 148074365, now seen corresponding path program 197 times [2021-06-05 15:09:21,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:21,705 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785302378] [2021-06-05 15:09:21,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:21,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:21,794 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:21,794 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:21,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785302378] [2021-06-05 15:09:21,794 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785302378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:21,794 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513137753] [2021-06-05 15:09:21,794 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 352 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:21,818 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:21,819 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:21,819 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:09:21,819 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:21,899 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:21,899 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:21,900 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:21,909 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:21,910 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:21,910 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:21,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:21,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513137753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:21,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:21,987 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:21,987 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317739234] [2021-06-05 15:09:21,987 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:21,987 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:21,987 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:21,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:21,987 INFO L87 Difference]: Start difference. First operand 3800 states and 15892 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:22,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:22,723 INFO L93 Difference]: Finished difference Result 4247 states and 17633 transitions. [2021-06-05 15:09:22,723 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:09:22,723 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:22,723 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:22,730 INFO L225 Difference]: With dead ends: 4247 [2021-06-05 15:09:22,730 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 15:09:22,730 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 626.4ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:09:22,734 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 15:09:22,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3804. [2021-06-05 15:09:22,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.183013410465422) internal successors, (15908), 3803 states have internal predecessors, (15908), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:22,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15908 transitions. [2021-06-05 15:09:22,781 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15908 transitions. Word has length 23 [2021-06-05 15:09:22,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:22,781 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15908 transitions. [2021-06-05 15:09:22,781 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:22,781 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15908 transitions. [2021-06-05 15:09:22,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:22,786 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:22,786 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:22,986 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable767,352 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:22,986 INFO L430 AbstractCegarLoop]: === Iteration 353 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:22,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:22,986 INFO L82 PathProgramCache]: Analyzing trace with hash 1223785521, now seen corresponding path program 198 times [2021-06-05 15:09:22,986 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:22,986 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444837675] [2021-06-05 15:09:22,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:22,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:23,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:23,074 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:23,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444837675] [2021-06-05 15:09:23,074 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [444837675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:23,074 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174769624] [2021-06-05 15:09:23,074 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 353 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:23,098 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:09:23,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:23,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:23,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:23,175 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:23,175 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:23,176 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:23,184 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:23,185 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:23,185 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:23,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:23,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174769624] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:23,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:23,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:23,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752755351] [2021-06-05 15:09:23,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:23,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:23,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:23,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:23,261 INFO L87 Difference]: Start difference. First operand 3804 states and 15908 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:23,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:23,958 INFO L93 Difference]: Finished difference Result 4202 states and 17460 transitions. [2021-06-05 15:09:23,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:23,959 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:23,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:23,966 INFO L225 Difference]: With dead ends: 4202 [2021-06-05 15:09:23,966 INFO L226 Difference]: Without dead ends: 4181 [2021-06-05 15:09:23,966 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 572.9ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:09:23,970 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4181 states. [2021-06-05 15:09:24,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4181 to 3796. [2021-06-05 15:09:24,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3796 states, 3795 states have (on average 4.182872200263505) internal successors, (15874), 3795 states have internal predecessors, (15874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:24,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3796 states to 3796 states and 15874 transitions. [2021-06-05 15:09:24,035 INFO L78 Accepts]: Start accepts. Automaton has 3796 states and 15874 transitions. Word has length 23 [2021-06-05 15:09:24,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:24,035 INFO L482 AbstractCegarLoop]: Abstraction has 3796 states and 15874 transitions. [2021-06-05 15:09:24,035 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:24,035 INFO L276 IsEmpty]: Start isEmpty. Operand 3796 states and 15874 transitions. [2021-06-05 15:09:24,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:24,040 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:24,041 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:24,241 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable769,353 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:24,241 INFO L430 AbstractCegarLoop]: === Iteration 354 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:24,241 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:24,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1394600453, now seen corresponding path program 199 times [2021-06-05 15:09:24,241 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:24,241 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888989169] [2021-06-05 15:09:24,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:24,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:24,324 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:24,324 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:24,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888989169] [2021-06-05 15:09:24,324 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1888989169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:24,324 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248457206] [2021-06-05 15:09:24,324 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 354 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:24,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:24,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:24,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:24,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:24,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:24,450 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:24,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:24,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:24,509 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:24,509 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1248457206] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:24,509 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:24,509 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:24,509 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254626265] [2021-06-05 15:09:24,509 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:24,509 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:24,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:24,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:24,510 INFO L87 Difference]: Start difference. First operand 3796 states and 15874 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:24,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:24,960 INFO L93 Difference]: Finished difference Result 4161 states and 17301 transitions. [2021-06-05 15:09:24,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:09:24,960 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:24,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:24,967 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 15:09:24,968 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 15:09:24,968 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 368.0ms TimeCoverageRelationStatistics Valid=120, Invalid=582, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:24,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 15:09:25,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3788. [2021-06-05 15:09:25,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3788 states, 3787 states have (on average 4.182730393451281) internal successors, (15840), 3787 states have internal predecessors, (15840), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3788 states to 3788 states and 15840 transitions. [2021-06-05 15:09:25,021 INFO L78 Accepts]: Start accepts. Automaton has 3788 states and 15840 transitions. Word has length 23 [2021-06-05 15:09:25,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:25,021 INFO L482 AbstractCegarLoop]: Abstraction has 3788 states and 15840 transitions. [2021-06-05 15:09:25,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:25,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3788 states and 15840 transitions. [2021-06-05 15:09:25,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:25,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:25,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:25,226 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable771,354 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:25,227 INFO L430 AbstractCegarLoop]: === Iteration 355 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:25,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:25,227 INFO L82 PathProgramCache]: Analyzing trace with hash 573027889, now seen corresponding path program 200 times [2021-06-05 15:09:25,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:25,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926335690] [2021-06-05 15:09:25,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:25,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:25,308 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:25,308 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:25,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926335690] [2021-06-05 15:09:25,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [926335690] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:25,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43748620] [2021-06-05 15:09:25,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 355 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:25,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:25,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:25,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:25,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:25,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:25,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:25,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:25,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:25,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:25,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:25,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:25,487 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [43748620] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:25,487 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:25,487 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:25,487 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009923483] [2021-06-05 15:09:25,487 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:25,487 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:25,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:25,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:25,487 INFO L87 Difference]: Start difference. First operand 3788 states and 15840 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:26,199 INFO L93 Difference]: Finished difference Result 4652 states and 19252 transitions. [2021-06-05 15:09:26,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:26,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:26,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:26,208 INFO L225 Difference]: With dead ends: 4652 [2021-06-05 15:09:26,208 INFO L226 Difference]: Without dead ends: 4630 [2021-06-05 15:09:26,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 495.3ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:26,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4630 states. [2021-06-05 15:09:26,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4630 to 3804. [2021-06-05 15:09:26,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3804 states, 3803 states have (on average 4.1851170128845645) internal successors, (15916), 3803 states have internal predecessors, (15916), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,266 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3804 states to 3804 states and 15916 transitions. [2021-06-05 15:09:26,266 INFO L78 Accepts]: Start accepts. Automaton has 3804 states and 15916 transitions. Word has length 23 [2021-06-05 15:09:26,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:26,266 INFO L482 AbstractCegarLoop]: Abstraction has 3804 states and 15916 transitions. [2021-06-05 15:09:26,266 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:26,266 INFO L276 IsEmpty]: Start isEmpty. Operand 3804 states and 15916 transitions. [2021-06-05 15:09:26,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:26,273 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:26,273 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:26,473 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 355 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable773 [2021-06-05 15:09:26,473 INFO L430 AbstractCegarLoop]: === Iteration 356 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:26,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:26,473 INFO L82 PathProgramCache]: Analyzing trace with hash 1158361841, now seen corresponding path program 201 times [2021-06-05 15:09:26,473 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:26,473 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454848639] [2021-06-05 15:09:26,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:26,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:26,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454848639] [2021-06-05 15:09:26,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [454848639] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177009554] [2021-06-05 15:09:26,559 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 356 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:26,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:26,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:26,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:26,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:26,683 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:26,708 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:26,708 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:09:26,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,721 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:26,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:26,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:09:26,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:26,807 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1177009554] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:26,807 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:26,807 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:26,807 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087185941] [2021-06-05 15:09:26,807 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:26,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:26,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:26,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:26,808 INFO L87 Difference]: Start difference. First operand 3804 states and 15916 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:27,525 INFO L93 Difference]: Finished difference Result 4448 states and 18398 transitions. [2021-06-05 15:09:27,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:09:27,526 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:27,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:27,533 INFO L225 Difference]: With dead ends: 4448 [2021-06-05 15:09:27,533 INFO L226 Difference]: Without dead ends: 4422 [2021-06-05 15:09:27,533 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 309 ImplicationChecksByTransitivity, 600.9ms TimeCoverageRelationStatistics Valid=204, Invalid=1278, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:09:27,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2021-06-05 15:09:27,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 3808. [2021-06-05 15:09:27,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.184922511163646) internal successors, (15932), 3807 states have internal predecessors, (15932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15932 transitions. [2021-06-05 15:09:27,586 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15932 transitions. Word has length 23 [2021-06-05 15:09:27,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:27,586 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15932 transitions. [2021-06-05 15:09:27,586 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:27,586 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15932 transitions. [2021-06-05 15:09:27,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:27,591 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:27,591 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:27,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable775,356 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:27,791 INFO L430 AbstractCegarLoop]: === Iteration 357 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:27,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:27,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1523038721, now seen corresponding path program 202 times [2021-06-05 15:09:27,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:27,792 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859763843] [2021-06-05 15:09:27,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:27,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:27,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:27,877 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:27,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859763843] [2021-06-05 15:09:27,877 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859763843] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:27,877 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903516669] [2021-06-05 15:09:27,877 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 357 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:27,900 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:27,900 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:27,901 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:27,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:27,972 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:27,973 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:27,974 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:27,981 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:27,982 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:27,982 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:28,058 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:28,059 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1903516669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:28,059 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:28,059 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:28,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636145101] [2021-06-05 15:09:28,059 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:28,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:28,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:28,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:28,059 INFO L87 Difference]: Start difference. First operand 3808 states and 15932 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:28,751 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:28,751 INFO L93 Difference]: Finished difference Result 4478 states and 18535 transitions. [2021-06-05 15:09:28,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:09:28,752 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:28,752 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:28,759 INFO L225 Difference]: With dead ends: 4478 [2021-06-05 15:09:28,759 INFO L226 Difference]: Without dead ends: 4457 [2021-06-05 15:09:28,759 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 622.7ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:09:28,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4457 states. [2021-06-05 15:09:28,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4457 to 3800. [2021-06-05 15:09:28,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3800 states, 3799 states have (on average 4.18478546986049) internal successors, (15898), 3799 states have internal predecessors, (15898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:28,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3800 states to 3800 states and 15898 transitions. [2021-06-05 15:09:28,810 INFO L78 Accepts]: Start accepts. Automaton has 3800 states and 15898 transitions. Word has length 23 [2021-06-05 15:09:28,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:28,810 INFO L482 AbstractCegarLoop]: Abstraction has 3800 states and 15898 transitions. [2021-06-05 15:09:28,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:28,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3800 states and 15898 transitions. [2021-06-05 15:09:28,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:28,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:28,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:29,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 357 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable779 [2021-06-05 15:09:29,015 INFO L430 AbstractCegarLoop]: === Iteration 358 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:29,015 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:29,015 INFO L82 PathProgramCache]: Analyzing trace with hash 922525267, now seen corresponding path program 203 times [2021-06-05 15:09:29,015 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:29,015 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535364746] [2021-06-05 15:09:29,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:29,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:29,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:29,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535364746] [2021-06-05 15:09:29,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1535364746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:29,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234067328] [2021-06-05 15:09:29,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 358 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:29,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:29,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:29,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:29,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:29,203 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:29,204 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:29,233 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:29,241 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:29,241 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:29,241 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:29,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:29,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234067328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:29,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:29,302 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:29,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6861604] [2021-06-05 15:09:29,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:29,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:29,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:29,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:29,302 INFO L87 Difference]: Start difference. First operand 3800 states and 15898 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:29,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:29,989 INFO L93 Difference]: Finished difference Result 4701 states and 19407 transitions. [2021-06-05 15:09:29,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:09:29,989 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:29,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:29,997 INFO L225 Difference]: With dead ends: 4701 [2021-06-05 15:09:29,997 INFO L226 Difference]: Without dead ends: 4666 [2021-06-05 15:09:29,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:09:30,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4666 states. [2021-06-05 15:09:30,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4666 to 3808. [2021-06-05 15:09:30,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.184922511163646) internal successors, (15932), 3807 states have internal predecessors, (15932), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15932 transitions. [2021-06-05 15:09:30,052 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15932 transitions. Word has length 23 [2021-06-05 15:09:30,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:30,052 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15932 transitions. [2021-06-05 15:09:30,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:30,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15932 transitions. [2021-06-05 15:09:30,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:30,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:30,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:30,257 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable781,358 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:30,257 INFO L430 AbstractCegarLoop]: === Iteration 359 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:30,257 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:30,257 INFO L82 PathProgramCache]: Analyzing trace with hash 1003924323, now seen corresponding path program 204 times [2021-06-05 15:09:30,257 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:30,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1471213552] [2021-06-05 15:09:30,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:30,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:30,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:30,342 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:30,342 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1471213552] [2021-06-05 15:09:30,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1471213552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,343 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [493363517] [2021-06-05 15:09:30,343 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 359 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:30,366 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:30,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:30,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:30,367 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:30,435 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:30,441 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:30,441 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 15:09:30,442 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:30,451 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:30,451 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:30,451 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:36 [2021-06-05 15:09:30,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:30,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [493363517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:30,518 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:30,518 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:09:30,518 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712096500] [2021-06-05 15:09:30,518 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:09:30,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:30,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:09:30,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:09:30,518 INFO L87 Difference]: Start difference. First operand 3808 states and 15932 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:31,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:31,060 INFO L93 Difference]: Finished difference Result 4239 states and 17592 transitions. [2021-06-05 15:09:31,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:31,060 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:31,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:31,067 INFO L225 Difference]: With dead ends: 4239 [2021-06-05 15:09:31,067 INFO L226 Difference]: Without dead ends: 4213 [2021-06-05 15:09:31,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 335.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:09:31,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4213 states. [2021-06-05 15:09:31,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4213 to 3812. [2021-06-05 15:09:31,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1847284177381265) internal successors, (15948), 3811 states have internal predecessors, (15948), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:31,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15948 transitions. [2021-06-05 15:09:31,117 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15948 transitions. Word has length 23 [2021-06-05 15:09:31,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:31,117 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15948 transitions. [2021-06-05 15:09:31,117 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:31,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15948 transitions. [2021-06-05 15:09:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:31,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:31,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:31,323 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 359 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable783 [2021-06-05 15:09:31,323 INFO L430 AbstractCegarLoop]: === Iteration 360 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:31,323 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:31,323 INFO L82 PathProgramCache]: Analyzing trace with hash -1677476239, now seen corresponding path program 205 times [2021-06-05 15:09:31,323 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:31,323 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [95381842] [2021-06-05 15:09:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:31,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:31,408 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:31,409 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [95381842] [2021-06-05 15:09:31,409 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [95381842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:31,409 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [146020774] [2021-06-05 15:09:31,409 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 360 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:31,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:31,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:31,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:31,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:31,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:31,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:31,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:31,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:31,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:31,589 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [146020774] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:31,589 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:31,589 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:31,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [672996267] [2021-06-05 15:09:31,589 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:31,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:31,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:31,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:31,589 INFO L87 Difference]: Start difference. First operand 3812 states and 15948 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,265 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:32,265 INFO L93 Difference]: Finished difference Result 4410 states and 18271 transitions. [2021-06-05 15:09:32,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:09:32,265 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:32,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:32,272 INFO L225 Difference]: With dead ends: 4410 [2021-06-05 15:09:32,273 INFO L226 Difference]: Without dead ends: 4389 [2021-06-05 15:09:32,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 569.8ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:32,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4389 states. [2021-06-05 15:09:32,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4389 to 3806. [2021-06-05 15:09:32,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3806 states, 3805 states have (on average 4.185545335085414) internal successors, (15926), 3805 states have internal predecessors, (15926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3806 states to 3806 states and 15926 transitions. [2021-06-05 15:09:32,324 INFO L78 Accepts]: Start accepts. Automaton has 3806 states and 15926 transitions. Word has length 23 [2021-06-05 15:09:32,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:32,324 INFO L482 AbstractCegarLoop]: Abstraction has 3806 states and 15926 transitions. [2021-06-05 15:09:32,324 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:32,324 INFO L276 IsEmpty]: Start isEmpty. Operand 3806 states and 15926 transitions. [2021-06-05 15:09:32,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:32,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:32,329 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:32,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable784,360 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:32,529 INFO L430 AbstractCegarLoop]: === Iteration 361 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:32,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:32,529 INFO L82 PathProgramCache]: Analyzing trace with hash -1541226251, now seen corresponding path program 206 times [2021-06-05 15:09:32,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:32,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608487199] [2021-06-05 15:09:32,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:32,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:32,609 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:32,609 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608487199] [2021-06-05 15:09:32,609 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608487199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:32,609 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645973361] [2021-06-05 15:09:32,610 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 361 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:32,632 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:32,632 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:32,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:32,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:32,723 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:32,723 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:32,724 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:32,731 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:32,732 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:32,732 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:32,790 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:32,790 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645973361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:32,791 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:32,791 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:32,791 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1124480313] [2021-06-05 15:09:32,791 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:32,791 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:32,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:32,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:32,791 INFO L87 Difference]: Start difference. First operand 3806 states and 15926 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:33,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:33,402 INFO L93 Difference]: Finished difference Result 4278 states and 17767 transitions. [2021-06-05 15:09:33,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:33,402 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:33,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:33,410 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 15:09:33,411 INFO L226 Difference]: Without dead ends: 4256 [2021-06-05 15:09:33,411 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 451.4ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:09:33,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-06-05 15:09:33,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3812. [2021-06-05 15:09:33,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1860404093413806) internal successors, (15953), 3811 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15953 transitions. [2021-06-05 15:09:33,467 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15953 transitions. Word has length 23 [2021-06-05 15:09:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:33,467 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15953 transitions. [2021-06-05 15:09:33,467 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15953 transitions. [2021-06-05 15:09:33,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:33,472 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:33,472 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:33,672 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 361 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable786 [2021-06-05 15:09:33,672 INFO L430 AbstractCegarLoop]: === Iteration 362 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:33,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:33,673 INFO L82 PathProgramCache]: Analyzing trace with hash -955892299, now seen corresponding path program 207 times [2021-06-05 15:09:33,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:33,673 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336299607] [2021-06-05 15:09:33,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:33,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:33,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:33,766 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:33,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336299607] [2021-06-05 15:09:33,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336299607] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:33,766 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515225330] [2021-06-05 15:09:33,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 362 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:33,789 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:09:33,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:33,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:33,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:33,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:33,898 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:33,898 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 33 treesize of output 61 [2021-06-05 15:09:33,899 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:33,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:33,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:33,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 15:09:34,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:34,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1515225330] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:34,003 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:34,003 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574823314] [2021-06-05 15:09:34,003 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:34,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:34,003 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:34,003 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:34,003 INFO L87 Difference]: Start difference. First operand 3812 states and 15953 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:34,642 INFO L93 Difference]: Finished difference Result 4195 states and 17417 transitions. [2021-06-05 15:09:34,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:09:34,642 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:34,642 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:34,649 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 15:09:34,649 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 15:09:34,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 466.4ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:09:34,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 15:09:34,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3816. [2021-06-05 15:09:34,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 4.185845347313237) internal successors, (15969), 3815 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 15969 transitions. [2021-06-05 15:09:34,698 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 15969 transitions. Word has length 23 [2021-06-05 15:09:34,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:34,699 INFO L482 AbstractCegarLoop]: Abstraction has 3816 states and 15969 transitions. [2021-06-05 15:09:34,699 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:34,699 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 15969 transitions. [2021-06-05 15:09:34,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:34,704 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:34,704 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:34,904 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable788,362 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:34,904 INFO L430 AbstractCegarLoop]: === Iteration 363 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:34,904 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:34,904 INFO L82 PathProgramCache]: Analyzing trace with hash 657674435, now seen corresponding path program 208 times [2021-06-05 15:09:34,904 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:34,904 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182175037] [2021-06-05 15:09:34,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:34,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:34,990 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:34,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182175037] [2021-06-05 15:09:34,990 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182175037] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:34,990 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249477448] [2021-06-05 15:09:34,990 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 363 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:35,013 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:35,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:35,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:35,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:35,093 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:35,093 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:35,094 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:35,102 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:35,103 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:35,103 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:35,181 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:35,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249477448] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:35,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:35,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:35,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339266811] [2021-06-05 15:09:35,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:35,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:35,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:35,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:35,182 INFO L87 Difference]: Start difference. First operand 3816 states and 15969 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:36,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:36,009 INFO L93 Difference]: Finished difference Result 4199 states and 17433 transitions. [2021-06-05 15:09:36,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:36,009 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:36,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:36,016 INFO L225 Difference]: With dead ends: 4199 [2021-06-05 15:09:36,016 INFO L226 Difference]: Without dead ends: 4178 [2021-06-05 15:09:36,016 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:36,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4178 states. [2021-06-05 15:09:36,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4178 to 3808. [2021-06-05 15:09:36,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:36,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 15:09:36,067 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 15:09:36,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:36,067 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 15:09:36,067 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:36,067 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 15:09:36,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:36,072 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:36,072 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:36,272 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable792,363 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:36,273 INFO L430 AbstractCegarLoop]: === Iteration 364 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:36,273 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:36,273 INFO L82 PathProgramCache]: Analyzing trace with hash -1768447631, now seen corresponding path program 209 times [2021-06-05 15:09:36,273 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:36,273 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [418893347] [2021-06-05 15:09:36,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:36,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:36,353 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:36,353 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:36,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [418893347] [2021-06-05 15:09:36,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [418893347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:36,353 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1686214180] [2021-06-05 15:09:36,353 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 364 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:36,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:36,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:36,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:36,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:36,487 INFO L354 Elim1Store]: treesize reduction 21, result has 57.1 percent of original size [2021-06-05 15:09:36,487 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 27 treesize of output 47 [2021-06-05 15:09:36,488 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:36,496 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:36,497 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:36,497 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:29 [2021-06-05 15:09:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1686214180] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:36,557 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:36,557 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:36,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610976180] [2021-06-05 15:09:36,557 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:36,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:36,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:36,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:36,557 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:37,184 INFO L93 Difference]: Finished difference Result 4327 states and 17960 transitions. [2021-06-05 15:09:37,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:37,184 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:37,184 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:37,192 INFO L225 Difference]: With dead ends: 4327 [2021-06-05 15:09:37,192 INFO L226 Difference]: Without dead ends: 4305 [2021-06-05 15:09:37,192 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 481.6ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:09:37,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4305 states. [2021-06-05 15:09:37,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4305 to 3812. [2021-06-05 15:09:37,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3812 states, 3811 states have (on average 4.1860404093413806) internal successors, (15953), 3811 states have internal predecessors, (15953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3812 states to 3812 states and 15953 transitions. [2021-06-05 15:09:37,242 INFO L78 Accepts]: Start accepts. Automaton has 3812 states and 15953 transitions. Word has length 23 [2021-06-05 15:09:37,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:37,242 INFO L482 AbstractCegarLoop]: Abstraction has 3812 states and 15953 transitions. [2021-06-05 15:09:37,242 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:37,242 INFO L276 IsEmpty]: Start isEmpty. Operand 3812 states and 15953 transitions. [2021-06-05 15:09:37,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:37,247 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:37,247 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:37,447 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 364 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable794 [2021-06-05 15:09:37,447 INFO L430 AbstractCegarLoop]: === Iteration 365 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:37,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:37,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1254920779, now seen corresponding path program 210 times [2021-06-05 15:09:37,448 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:37,448 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1520849505] [2021-06-05 15:09:37,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:37,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:37,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:37,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:37,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1520849505] [2021-06-05 15:09:37,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1520849505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:37,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389245481] [2021-06-05 15:09:37,537 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 365 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:37,561 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:37,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:37,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:37,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:37,638 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:37,638 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:37,639 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,647 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:37,647 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:37,647 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:37,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1389245481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:37,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:37,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:37,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630758466] [2021-06-05 15:09:37,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:37,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:37,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:37,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:37,724 INFO L87 Difference]: Start difference. First operand 3812 states and 15953 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:38,309 INFO L93 Difference]: Finished difference Result 4262 states and 17680 transitions. [2021-06-05 15:09:38,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:09:38,310 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:38,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:38,317 INFO L225 Difference]: With dead ends: 4262 [2021-06-05 15:09:38,317 INFO L226 Difference]: Without dead ends: 4237 [2021-06-05 15:09:38,317 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 472.3ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:38,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4237 states. [2021-06-05 15:09:38,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4237 to 3816. [2021-06-05 15:09:38,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3816 states, 3815 states have (on average 4.185845347313237) internal successors, (15969), 3815 states have internal predecessors, (15969), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3816 states to 3816 states and 15969 transitions. [2021-06-05 15:09:38,367 INFO L78 Accepts]: Start accepts. Automaton has 3816 states and 15969 transitions. Word has length 23 [2021-06-05 15:09:38,367 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:38,367 INFO L482 AbstractCegarLoop]: Abstraction has 3816 states and 15969 transitions. [2021-06-05 15:09:38,367 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:38,367 INFO L276 IsEmpty]: Start isEmpty. Operand 3816 states and 15969 transitions. [2021-06-05 15:09:38,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:38,372 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:38,372 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:38,572 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 365 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable796 [2021-06-05 15:09:38,572 INFO L430 AbstractCegarLoop]: === Iteration 366 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:38,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:38,573 INFO L82 PathProgramCache]: Analyzing trace with hash -179209623, now seen corresponding path program 211 times [2021-06-05 15:09:38,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:38,573 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2076981717] [2021-06-05 15:09:38,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:38,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:38,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:38,663 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2076981717] [2021-06-05 15:09:38,663 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2076981717] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:38,663 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589168423] [2021-06-05 15:09:38,664 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 366 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:38,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:38,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:38,687 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:38,763 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:38,763 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:38,764 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:38,772 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:38,772 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:38,772 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:38,850 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:38,850 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589168423] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:38,850 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:38,850 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:38,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499624537] [2021-06-05 15:09:38,851 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:38,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:38,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:38,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:38,851 INFO L87 Difference]: Start difference. First operand 3816 states and 15969 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,653 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:39,653 INFO L93 Difference]: Finished difference Result 4257 states and 17668 transitions. [2021-06-05 15:09:39,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:39,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:39,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:39,660 INFO L225 Difference]: With dead ends: 4257 [2021-06-05 15:09:39,661 INFO L226 Difference]: Without dead ends: 4236 [2021-06-05 15:09:39,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 659.7ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:39,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4236 states. [2021-06-05 15:09:39,723 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4236 to 3808. [2021-06-05 15:09:39,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 15:09:39,735 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 15:09:39,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:39,735 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 15:09:39,735 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:39,735 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 15:09:39,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:39,740 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:39,740 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:39,940 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 366 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable798 [2021-06-05 15:09:39,940 INFO L430 AbstractCegarLoop]: === Iteration 367 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:39,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:39,940 INFO L82 PathProgramCache]: Analyzing trace with hash 101786229, now seen corresponding path program 212 times [2021-06-05 15:09:39,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:39,941 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1002153943] [2021-06-05 15:09:39,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:39,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:40,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:40,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1002153943] [2021-06-05 15:09:40,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1002153943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:40,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [769995839] [2021-06-05 15:09:40,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 367 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:40,053 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:40,054 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:40,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:40,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:40,119 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:40,119 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:40,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:40,129 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:40,130 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:40,130 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:40,235 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:40,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [769995839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:40,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:40,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:40,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236101543] [2021-06-05 15:09:40,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:40,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:40,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:40,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:40,236 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,753 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:40,754 INFO L93 Difference]: Finished difference Result 4175 states and 17333 transitions. [2021-06-05 15:09:40,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:09:40,754 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:40,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:40,761 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 15:09:40,761 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 15:09:40,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 458.7ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:40,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 15:09:40,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3817. [2021-06-05 15:09:40,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3817 states, 3816 states have (on average 4.184224318658281) internal successors, (15967), 3816 states have internal predecessors, (15967), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,810 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3817 states to 3817 states and 15967 transitions. [2021-06-05 15:09:40,810 INFO L78 Accepts]: Start accepts. Automaton has 3817 states and 15967 transitions. Word has length 23 [2021-06-05 15:09:40,810 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:40,810 INFO L482 AbstractCegarLoop]: Abstraction has 3817 states and 15967 transitions. [2021-06-05 15:09:40,810 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:40,810 INFO L276 IsEmpty]: Start isEmpty. Operand 3817 states and 15967 transitions. [2021-06-05 15:09:40,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:40,815 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:40,815 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:41,015 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable800,367 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:41,016 INFO L430 AbstractCegarLoop]: === Iteration 368 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:41,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:41,016 INFO L82 PathProgramCache]: Analyzing trace with hash -939789839, now seen corresponding path program 213 times [2021-06-05 15:09:41,016 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:41,016 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614929650] [2021-06-05 15:09:41,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:41,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:41,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614929650] [2021-06-05 15:09:41,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614929650] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:41,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1454837917] [2021-06-05 15:09:41,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 368 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:41,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:41,127 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:41,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:41,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:41,190 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:41,190 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:41,191 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:41,200 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:41,200 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:41,200 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:41,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:41,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1454837917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:41,301 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:41,301 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:41,301 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849257651] [2021-06-05 15:09:41,302 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:41,302 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:41,302 INFO L87 Difference]: Start difference. First operand 3817 states and 15967 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:41,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:41,805 INFO L93 Difference]: Finished difference Result 4135 states and 17177 transitions. [2021-06-05 15:09:41,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:09:41,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:41,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:41,812 INFO L225 Difference]: With dead ends: 4135 [2021-06-05 15:09:41,812 INFO L226 Difference]: Without dead ends: 4107 [2021-06-05 15:09:41,812 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 382.6ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:41,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4107 states. [2021-06-05 15:09:41,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4107 to 3810. [2021-06-05 15:09:41,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.1856130217904965) internal successors, (15943), 3809 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:41,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15943 transitions. [2021-06-05 15:09:41,861 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15943 transitions. Word has length 23 [2021-06-05 15:09:41,861 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:41,861 INFO L482 AbstractCegarLoop]: Abstraction has 3810 states and 15943 transitions. [2021-06-05 15:09:41,861 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:41,861 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15943 transitions. [2021-06-05 15:09:41,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:41,866 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:41,866 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:42,066 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 368 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable802 [2021-06-05 15:09:42,066 INFO L430 AbstractCegarLoop]: === Iteration 369 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:42,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:42,066 INFO L82 PathProgramCache]: Analyzing trace with hash -1226911191, now seen corresponding path program 214 times [2021-06-05 15:09:42,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:42,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999904917] [2021-06-05 15:09:42,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:42,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:42,158 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:42,158 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999904917] [2021-06-05 15:09:42,158 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999904917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:42,158 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [232931398] [2021-06-05 15:09:42,158 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 369 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:42,181 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:42,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:42,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:42,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:42,248 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:42,249 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:42,250 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:42,258 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:42,259 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:42,259 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:42,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:42,385 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [232931398] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:42,385 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:42,385 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:42,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [464889812] [2021-06-05 15:09:42,385 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:42,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:42,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:42,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:42,385 INFO L87 Difference]: Start difference. First operand 3810 states and 15943 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:42,995 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:42,995 INFO L93 Difference]: Finished difference Result 4162 states and 17284 transitions. [2021-06-05 15:09:42,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:42,996 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:42,996 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:43,003 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 15:09:43,003 INFO L226 Difference]: Without dead ends: 4136 [2021-06-05 15:09:43,003 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 539.9ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:43,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4136 states. [2021-06-05 15:09:43,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4136 to 3814. [2021-06-05 15:09:43,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3813 states have (on average 4.185418305795961) internal successors, (15959), 3813 states have internal predecessors, (15959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:43,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 15959 transitions. [2021-06-05 15:09:43,055 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 15959 transitions. Word has length 23 [2021-06-05 15:09:43,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:43,055 INFO L482 AbstractCegarLoop]: Abstraction has 3814 states and 15959 transitions. [2021-06-05 15:09:43,055 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:43,055 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 15959 transitions. [2021-06-05 15:09:43,060 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:43,060 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:43,060 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:43,260 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable804,369 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:43,260 INFO L430 AbstractCegarLoop]: === Iteration 370 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:43,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:43,261 INFO L82 PathProgramCache]: Analyzing trace with hash -1720128577, now seen corresponding path program 215 times [2021-06-05 15:09:43,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:43,261 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378487422] [2021-06-05 15:09:43,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:43,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:43,352 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378487422] [2021-06-05 15:09:43,352 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1378487422] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:43,352 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402662770] [2021-06-05 15:09:43,352 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 370 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:43,376 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:43,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:43,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:43,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:43,442 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:43,442 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:43,443 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:43,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:43,453 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:43,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:43,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:43,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [402662770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:43,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:43,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:43,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1894217227] [2021-06-05 15:09:43,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:43,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:43,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:43,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:43,553 INFO L87 Difference]: Start difference. First operand 3814 states and 15959 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:44,239 INFO L93 Difference]: Finished difference Result 4142 states and 17206 transitions. [2021-06-05 15:09:44,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:44,239 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:44,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:44,246 INFO L225 Difference]: With dead ends: 4142 [2021-06-05 15:09:44,246 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 15:09:44,247 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 601.5ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:44,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 15:09:44,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3810. [2021-06-05 15:09:44,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3810 states, 3809 states have (on average 4.1856130217904965) internal successors, (15943), 3809 states have internal predecessors, (15943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3810 states to 3810 states and 15943 transitions. [2021-06-05 15:09:44,297 INFO L78 Accepts]: Start accepts. Automaton has 3810 states and 15943 transitions. Word has length 23 [2021-06-05 15:09:44,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:44,297 INFO L482 AbstractCegarLoop]: Abstraction has 3810 states and 15943 transitions. [2021-06-05 15:09:44,297 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:44,297 INFO L276 IsEmpty]: Start isEmpty. Operand 3810 states and 15943 transitions. [2021-06-05 15:09:44,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:44,302 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:44,302 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:44,502 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable806,370 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:44,502 INFO L430 AbstractCegarLoop]: === Iteration 371 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:44,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:44,503 INFO L82 PathProgramCache]: Analyzing trace with hash -785352321, now seen corresponding path program 216 times [2021-06-05 15:09:44,503 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:44,503 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1124177285] [2021-06-05 15:09:44,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:44,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:44,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:44,592 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1124177285] [2021-06-05 15:09:44,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1124177285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:44,592 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592446395] [2021-06-05 15:09:44,592 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 371 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:44,616 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:44,616 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:44,616 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:44,617 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:44,687 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:09:44,706 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:09:44,706 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:09:44,708 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:44,720 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:44,721 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:44,721 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 15:09:44,814 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:44,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1592446395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:44,815 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:44,815 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:44,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485785030] [2021-06-05 15:09:44,815 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:44,815 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:44,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:44,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:44,815 INFO L87 Difference]: Start difference. First operand 3810 states and 15943 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:45,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:45,388 INFO L93 Difference]: Finished difference Result 4150 states and 17239 transitions. [2021-06-05 15:09:45,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:09:45,388 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:45,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:45,395 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 15:09:45,395 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 15:09:45,395 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 422.3ms TimeCoverageRelationStatistics Valid=137, Invalid=733, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 15:09:45,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3814. [2021-06-05 15:09:45,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3814 states, 3813 states have (on average 4.185418305795961) internal successors, (15959), 3813 states have internal predecessors, (15959), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:45,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3814 states to 3814 states and 15959 transitions. [2021-06-05 15:09:45,445 INFO L78 Accepts]: Start accepts. Automaton has 3814 states and 15959 transitions. Word has length 23 [2021-06-05 15:09:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:45,445 INFO L482 AbstractCegarLoop]: Abstraction has 3814 states and 15959 transitions. [2021-06-05 15:09:45,445 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 3814 states and 15959 transitions. [2021-06-05 15:09:45,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:45,450 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:45,450 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:45,650 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 371 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable808 [2021-06-05 15:09:45,650 INFO L430 AbstractCegarLoop]: === Iteration 372 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:45,650 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:45,650 INFO L82 PathProgramCache]: Analyzing trace with hash -1798044853, now seen corresponding path program 217 times [2021-06-05 15:09:45,650 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:45,650 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514421374] [2021-06-05 15:09:45,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:45,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:45,738 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:45,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514421374] [2021-06-05 15:09:45,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1514421374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:45,738 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14043768] [2021-06-05 15:09:45,738 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 372 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:45,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:45,762 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:45,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:45,827 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:45,827 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:45,828 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:45,837 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:45,838 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:45,838 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:45,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:45,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14043768] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:45,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:45,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:45,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628023572] [2021-06-05 15:09:45,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:45,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:45,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:45,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:45,936 INFO L87 Difference]: Start difference. First operand 3814 states and 15959 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:46,590 INFO L93 Difference]: Finished difference Result 4159 states and 17276 transitions. [2021-06-05 15:09:46,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:46,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:46,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:46,597 INFO L225 Difference]: With dead ends: 4159 [2021-06-05 15:09:46,597 INFO L226 Difference]: Without dead ends: 4138 [2021-06-05 15:09:46,597 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 561.4ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:46,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4138 states. [2021-06-05 15:09:46,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4138 to 3808. [2021-06-05 15:09:46,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3808 states, 3807 states have (on average 4.185710533228264) internal successors, (15935), 3807 states have internal predecessors, (15935), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3808 states to 3808 states and 15935 transitions. [2021-06-05 15:09:46,649 INFO L78 Accepts]: Start accepts. Automaton has 3808 states and 15935 transitions. Word has length 23 [2021-06-05 15:09:46,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:46,649 INFO L482 AbstractCegarLoop]: Abstraction has 3808 states and 15935 transitions. [2021-06-05 15:09:46,649 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:46,649 INFO L276 IsEmpty]: Start isEmpty. Operand 3808 states and 15935 transitions. [2021-06-05 15:09:46,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:46,654 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:46,654 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:46,855 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable812,372 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:46,855 INFO L430 AbstractCegarLoop]: === Iteration 373 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:46,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:46,855 INFO L82 PathProgramCache]: Analyzing trace with hash -649178733, now seen corresponding path program 218 times [2021-06-05 15:09:46,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:46,855 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [754338824] [2021-06-05 15:09:46,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:46,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:46,938 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:46,938 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:46,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [754338824] [2021-06-05 15:09:46,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [754338824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:46,938 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494056374] [2021-06-05 15:09:46,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 373 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:46,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:46,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:46,963 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:46,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:47,054 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:47,054 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:47,055 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:47,063 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:47,064 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:47,064 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:47,126 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:47,126 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494056374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:47,126 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:47,126 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:47,126 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514265217] [2021-06-05 15:09:47,126 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:47,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:47,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:47,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:47,127 INFO L87 Difference]: Start difference. First operand 3808 states and 15935 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:47,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:47,672 INFO L93 Difference]: Finished difference Result 4333 states and 17949 transitions. [2021-06-05 15:09:47,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:09:47,673 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:47,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:47,681 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 15:09:47,681 INFO L226 Difference]: Without dead ends: 4298 [2021-06-05 15:09:47,681 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 417.6ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:47,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4298 states. [2021-06-05 15:09:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4298 to 3823. [2021-06-05 15:09:47,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.185243328100471) internal successors, (15996), 3822 states have internal predecessors, (15996), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:47,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 15996 transitions. [2021-06-05 15:09:47,734 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 15996 transitions. Word has length 23 [2021-06-05 15:09:47,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:47,734 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 15996 transitions. [2021-06-05 15:09:47,734 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:47,734 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 15996 transitions. [2021-06-05 15:09:47,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:47,739 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:47,739 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:47,939 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 373 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable814 [2021-06-05 15:09:47,939 INFO L430 AbstractCegarLoop]: === Iteration 374 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:47,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:47,940 INFO L82 PathProgramCache]: Analyzing trace with hash 1096105303, now seen corresponding path program 219 times [2021-06-05 15:09:47,940 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:47,940 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [22726903] [2021-06-05 15:09:47,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:47,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:48,025 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:48,025 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:48,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [22726903] [2021-06-05 15:09:48,025 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [22726903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:48,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [50246391] [2021-06-05 15:09:48,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 374 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:48,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:48,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:48,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:48,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:48,127 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:48,128 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:48,129 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:48,137 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:48,138 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:48,138 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:09:48,221 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:48,221 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [50246391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:48,221 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:48,221 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:48,221 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750727429] [2021-06-05 15:09:48,221 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:48,222 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:48,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:48,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:48,222 INFO L87 Difference]: Start difference. First operand 3823 states and 15996 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:48,800 INFO L93 Difference]: Finished difference Result 4185 states and 17367 transitions. [2021-06-05 15:09:48,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:09:48,800 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:48,800 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:48,808 INFO L225 Difference]: With dead ends: 4185 [2021-06-05 15:09:48,808 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 15:09:48,808 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 448.4ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:48,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 15:09:48,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3830. [2021-06-05 15:09:48,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3830 states, 3829 states have (on average 4.183860015669888) internal successors, (16020), 3829 states have internal predecessors, (16020), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3830 states to 3830 states and 16020 transitions. [2021-06-05 15:09:48,862 INFO L78 Accepts]: Start accepts. Automaton has 3830 states and 16020 transitions. Word has length 23 [2021-06-05 15:09:48,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:48,862 INFO L482 AbstractCegarLoop]: Abstraction has 3830 states and 16020 transitions. [2021-06-05 15:09:48,862 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:48,862 INFO L276 IsEmpty]: Start isEmpty. Operand 3830 states and 16020 transitions. [2021-06-05 15:09:48,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:48,868 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:48,868 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:49,068 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable816,374 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:49,068 INFO L430 AbstractCegarLoop]: === Iteration 375 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:49,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:49,068 INFO L82 PathProgramCache]: Analyzing trace with hash 54529235, now seen corresponding path program 220 times [2021-06-05 15:09:49,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:49,068 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539278537] [2021-06-05 15:09:49,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:49,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:49,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:49,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:49,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539278537] [2021-06-05 15:09:49,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539278537] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:49,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911153088] [2021-06-05 15:09:49,154 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 375 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:49,178 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:49,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:49,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:49,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:49,258 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:49,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:49,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:49,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:49,269 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:49,269 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:09:49,350 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:49,351 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1911153088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:49,351 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:49,351 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:49,351 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338391478] [2021-06-05 15:09:49,351 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:49,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:49,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:49,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:49,351 INFO L87 Difference]: Start difference. First operand 3830 states and 16020 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:49,777 INFO L93 Difference]: Finished difference Result 4145 states and 17211 transitions. [2021-06-05 15:09:49,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:09:49,778 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:49,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:49,785 INFO L225 Difference]: With dead ends: 4145 [2021-06-05 15:09:49,785 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 15:09:49,785 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 384.5ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:49,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 15:09:49,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3823. [2021-06-05 15:09:49,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.186551543694401) internal successors, (16001), 3822 states have internal predecessors, (16001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 16001 transitions. [2021-06-05 15:09:49,836 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 16001 transitions. Word has length 23 [2021-06-05 15:09:49,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:49,836 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 16001 transitions. [2021-06-05 15:09:49,836 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:49,836 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 16001 transitions. [2021-06-05 15:09:49,841 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:49,841 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:49,841 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:50,041 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable818,375 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:50,041 INFO L430 AbstractCegarLoop]: === Iteration 376 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:50,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:50,042 INFO L82 PathProgramCache]: Analyzing trace with hash 1110874207, now seen corresponding path program 221 times [2021-06-05 15:09:50,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:50,042 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419971336] [2021-06-05 15:09:50,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:50,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:50,123 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:50,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419971336] [2021-06-05 15:09:50,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [419971336] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:50,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174011103] [2021-06-05 15:09:50,123 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 376 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:50,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:09:50,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:50,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:50,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:50,236 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:50,236 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:09:50,238 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:50,245 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:50,246 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:50,246 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:09:50,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:50,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174011103] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:50,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:50,333 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:50,333 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044312481] [2021-06-05 15:09:50,333 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:50,333 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:50,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:50,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:50,333 INFO L87 Difference]: Start difference. First operand 3823 states and 16001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:50,967 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:50,967 INFO L93 Difference]: Finished difference Result 4349 states and 18016 transitions. [2021-06-05 15:09:50,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:09:50,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:50,968 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:50,975 INFO L225 Difference]: With dead ends: 4349 [2021-06-05 15:09:50,975 INFO L226 Difference]: Without dead ends: 4314 [2021-06-05 15:09:50,975 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 464.9ms TimeCoverageRelationStatistics Valid=148, Invalid=782, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4314 states. [2021-06-05 15:09:51,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4314 to 3831. [2021-06-05 15:09:51,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.18668407310705) internal successors, (16035), 3830 states have internal predecessors, (16035), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:51,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16035 transitions. [2021-06-05 15:09:51,027 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16035 transitions. Word has length 23 [2021-06-05 15:09:51,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:51,027 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16035 transitions. [2021-06-05 15:09:51,027 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:51,027 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16035 transitions. [2021-06-05 15:09:51,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:51,032 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:51,032 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:51,232 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 376 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable820 [2021-06-05 15:09:51,233 INFO L430 AbstractCegarLoop]: === Iteration 377 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:51,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:51,233 INFO L82 PathProgramCache]: Analyzing trace with hash 306474983, now seen corresponding path program 222 times [2021-06-05 15:09:51,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:51,233 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171226438] [2021-06-05 15:09:51,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:51,320 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:51,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171226438] [2021-06-05 15:09:51,320 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171226438] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:51,320 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [461035567] [2021-06-05 15:09:51,320 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 377 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:51,344 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:09:51,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:51,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:09:51,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:51,447 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:09:51,448 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:09:51,449 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:51,459 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:51,460 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:51,460 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 15:09:51,545 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:51,545 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [461035567] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:51,545 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:51,545 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:51,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089905304] [2021-06-05 15:09:51,545 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:51,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:51,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:51,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:51,546 INFO L87 Difference]: Start difference. First operand 3831 states and 16035 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:52,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:52,379 INFO L93 Difference]: Finished difference Result 4235 states and 17569 transitions. [2021-06-05 15:09:52,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:09:52,379 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:52,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:52,386 INFO L225 Difference]: With dead ends: 4235 [2021-06-05 15:09:52,386 INFO L226 Difference]: Without dead ends: 4209 [2021-06-05 15:09:52,387 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 554.1ms TimeCoverageRelationStatistics Valid=178, Invalid=1154, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:09:52,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4209 states. [2021-06-05 15:09:52,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4209 to 3835. [2021-06-05 15:09:52,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.1864893062076165) internal successors, (16051), 3834 states have internal predecessors, (16051), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:52,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16051 transitions. [2021-06-05 15:09:52,441 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16051 transitions. Word has length 23 [2021-06-05 15:09:52,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:52,441 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16051 transitions. [2021-06-05 15:09:52,441 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:52,441 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16051 transitions. [2021-06-05 15:09:52,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:52,446 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:52,446 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:52,646 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 377 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable822 [2021-06-05 15:09:52,647 INFO L430 AbstractCegarLoop]: === Iteration 378 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:52,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:52,647 INFO L82 PathProgramCache]: Analyzing trace with hash 1920041717, now seen corresponding path program 223 times [2021-06-05 15:09:52,647 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:52,647 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746230343] [2021-06-05 15:09:52,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:52,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:52,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:52,734 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:52,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746230343] [2021-06-05 15:09:52,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1746230343] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:52,734 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [149316480] [2021-06-05 15:09:52,734 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 378 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:52,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:52,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:52,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:52,836 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:52,836 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:52,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:52,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:52,846 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:52,846 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:09:52,925 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:52,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [149316480] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:52,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:52,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:52,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093822898] [2021-06-05 15:09:52,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:52,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:52,926 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:52,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:52,926 INFO L87 Difference]: Start difference. First operand 3835 states and 16051 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:53,641 INFO L93 Difference]: Finished difference Result 4298 states and 17828 transitions. [2021-06-05 15:09:53,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:09:53,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:53,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:53,649 INFO L225 Difference]: With dead ends: 4298 [2021-06-05 15:09:53,649 INFO L226 Difference]: Without dead ends: 4277 [2021-06-05 15:09:53,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 185 ImplicationChecksByTransitivity, 625.5ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:09:53,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4277 states. [2021-06-05 15:09:53,689 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4277 to 3823. [2021-06-05 15:09:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3823 states, 3822 states have (on average 4.186551543694401) internal successors, (16001), 3822 states have internal predecessors, (16001), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3823 states to 3823 states and 16001 transitions. [2021-06-05 15:09:53,700 INFO L78 Accepts]: Start accepts. Automaton has 3823 states and 16001 transitions. Word has length 23 [2021-06-05 15:09:53,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:53,701 INFO L482 AbstractCegarLoop]: Abstraction has 3823 states and 16001 transitions. [2021-06-05 15:09:53,701 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:53,701 INFO L276 IsEmpty]: Start isEmpty. Operand 3823 states and 16001 transitions. [2021-06-05 15:09:53,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:53,706 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:53,706 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:53,906 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable826,378 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:53,906 INFO L430 AbstractCegarLoop]: === Iteration 379 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:53,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:53,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2011186791, now seen corresponding path program 224 times [2021-06-05 15:09:53,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:53,907 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566196269] [2021-06-05 15:09:53,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:53,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:53,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:53,997 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566196269] [2021-06-05 15:09:53,997 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566196269] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:53,997 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989286931] [2021-06-05 15:09:53,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 379 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:54,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:09:54,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:54,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:54,022 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:54,087 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:54,087 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:54,088 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:54,097 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:54,097 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:54,097 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:54,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:54,201 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1989286931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:54,201 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:54,201 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:54,201 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [826645148] [2021-06-05 15:09:54,202 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:54,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:54,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:54,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:54,202 INFO L87 Difference]: Start difference. First operand 3823 states and 16001 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:54,769 INFO L93 Difference]: Finished difference Result 4154 states and 17253 transitions. [2021-06-05 15:09:54,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:09:54,770 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:54,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:54,777 INFO L225 Difference]: With dead ends: 4154 [2021-06-05 15:09:54,777 INFO L226 Difference]: Without dead ends: 4128 [2021-06-05 15:09:54,778 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 458.3ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:09:54,781 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4128 states. [2021-06-05 15:09:54,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4128 to 3832. [2021-06-05 15:09:54,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3832 states, 3831 states have (on average 4.185069172539807) internal successors, (16033), 3831 states have internal predecessors, (16033), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3832 states to 3832 states and 16033 transitions. [2021-06-05 15:09:54,829 INFO L78 Accepts]: Start accepts. Automaton has 3832 states and 16033 transitions. Word has length 23 [2021-06-05 15:09:54,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:54,829 INFO L482 AbstractCegarLoop]: Abstraction has 3832 states and 16033 transitions. [2021-06-05 15:09:54,829 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:54,829 INFO L276 IsEmpty]: Start isEmpty. Operand 3832 states and 16033 transitions. [2021-06-05 15:09:54,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:54,834 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:54,835 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:55,035 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable828,379 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:55,035 INFO L430 AbstractCegarLoop]: === Iteration 380 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:55,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:55,035 INFO L82 PathProgramCache]: Analyzing trace with hash 969610723, now seen corresponding path program 225 times [2021-06-05 15:09:55,035 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:55,035 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214612219] [2021-06-05 15:09:55,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:55,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:55,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:55,125 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:55,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214612219] [2021-06-05 15:09:55,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214612219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:55,125 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2290335] [2021-06-05 15:09:55,125 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 380 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:55,150 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:09:55,150 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:55,151 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:55,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:55,217 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:55,218 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:55,219 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:55,228 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:55,228 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:55,228 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:55,329 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:55,329 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2290335] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:55,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:55,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:55,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528212689] [2021-06-05 15:09:55,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:55,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:55,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:55,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:55,330 INFO L87 Difference]: Start difference. First operand 3832 states and 16033 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:55,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:55,786 INFO L93 Difference]: Finished difference Result 4114 states and 17097 transitions. [2021-06-05 15:09:55,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:09:55,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:55,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:55,793 INFO L225 Difference]: With dead ends: 4114 [2021-06-05 15:09:55,793 INFO L226 Difference]: Without dead ends: 4086 [2021-06-05 15:09:55,794 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 406.6ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:09:55,797 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4086 states. [2021-06-05 15:09:55,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4086 to 3825. [2021-06-05 15:09:55,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:55,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 15:09:55,843 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 15:09:55,843 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:55,843 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 15:09:55,843 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:55,843 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 15:09:55,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:55,848 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:55,848 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:56,048 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable830,380 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:56,048 INFO L430 AbstractCegarLoop]: === Iteration 381 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:56,048 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:56,049 INFO L82 PathProgramCache]: Analyzing trace with hash 682489371, now seen corresponding path program 226 times [2021-06-05 15:09:56,049 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:56,049 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126032451] [2021-06-05 15:09:56,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:56,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:56,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:56,140 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126032451] [2021-06-05 15:09:56,140 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126032451] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:56,140 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148300916] [2021-06-05 15:09:56,140 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 381 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:56,164 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:09:56,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:56,164 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:56,165 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:56,229 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:56,229 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:56,230 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:56,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:56,239 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:56,239 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:56,340 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:56,340 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148300916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:56,340 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:56,340 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:56,340 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2001331328] [2021-06-05 15:09:56,340 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:56,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:56,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:56,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:56,340 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:56,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:56,945 INFO L93 Difference]: Finished difference Result 4141 states and 17204 transitions. [2021-06-05 15:09:56,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:56,945 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:56,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:56,952 INFO L225 Difference]: With dead ends: 4141 [2021-06-05 15:09:56,952 INFO L226 Difference]: Without dead ends: 4115 [2021-06-05 15:09:56,952 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 524.3ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:56,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4115 states. [2021-06-05 15:09:56,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4115 to 3829. [2021-06-05 15:09:56,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186259143155695) internal successors, (16025), 3828 states have internal predecessors, (16025), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16025 transitions. [2021-06-05 15:09:57,003 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16025 transitions. Word has length 23 [2021-06-05 15:09:57,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:57,003 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16025 transitions. [2021-06-05 15:09:57,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:57,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16025 transitions. [2021-06-05 15:09:57,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:57,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:57,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:57,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 381 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable832 [2021-06-05 15:09:57,208 INFO L430 AbstractCegarLoop]: === Iteration 382 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:57,208 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:57,209 INFO L82 PathProgramCache]: Analyzing trace with hash 189271985, now seen corresponding path program 227 times [2021-06-05 15:09:57,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:57,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1591706349] [2021-06-05 15:09:57,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:57,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:57,299 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:57,300 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:57,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1591706349] [2021-06-05 15:09:57,300 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1591706349] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:57,300 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792493632] [2021-06-05 15:09:57,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 382 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:57,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:09:57,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:57,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:57,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:57,390 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:57,390 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:57,391 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:57,399 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:57,400 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:57,400 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:57,499 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:57,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1792493632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:57,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:57,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:57,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706816430] [2021-06-05 15:09:57,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:57,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:57,500 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:57,500 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:57,500 INFO L87 Difference]: Start difference. First operand 3829 states and 16025 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:58,134 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:58,134 INFO L93 Difference]: Finished difference Result 4146 states and 17225 transitions. [2021-06-05 15:09:58,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:09:58,134 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:58,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:58,141 INFO L225 Difference]: With dead ends: 4146 [2021-06-05 15:09:58,141 INFO L226 Difference]: Without dead ends: 4125 [2021-06-05 15:09:58,141 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 596.4ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:09:58,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4125 states. [2021-06-05 15:09:58,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4125 to 3825. [2021-06-05 15:09:58,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:58,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 15:09:58,210 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 15:09:58,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:58,211 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 15:09:58,211 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:58,211 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 15:09:58,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:58,215 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:58,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:58,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable834,382 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:58,417 INFO L430 AbstractCegarLoop]: === Iteration 383 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:58,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:58,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1124048241, now seen corresponding path program 228 times [2021-06-05 15:09:58,417 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:58,417 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2091880649] [2021-06-05 15:09:58,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:58,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:58,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:58,504 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:58,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2091880649] [2021-06-05 15:09:58,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2091880649] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:58,504 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201899886] [2021-06-05 15:09:58,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 383 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:58,529 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:09:58,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:09:58,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:58,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:58,614 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:09:58,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:09:58,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:58,627 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:58,628 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:58,628 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 15:09:58,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:58,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201899886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:58,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:58,736 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:09:58,736 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041435883] [2021-06-05 15:09:58,736 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:09:58,737 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:58,737 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:09:58,737 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:09:58,737 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:09:59,247 INFO L93 Difference]: Finished difference Result 4148 states and 17235 transitions. [2021-06-05 15:09:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:09:59,248 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:09:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:09:59,255 INFO L225 Difference]: With dead ends: 4148 [2021-06-05 15:09:59,255 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 15:09:59,255 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 401.8ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:09:59,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 15:09:59,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3825. [2021-06-05 15:09:59,296 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 15:09:59,304 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 15:09:59,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:09:59,304 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 15:09:59,304 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:09:59,304 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 15:09:59,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:09:59,310 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:09:59,310 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:09:59,510 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 383 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable836 [2021-06-05 15:09:59,510 INFO L430 AbstractCegarLoop]: === Iteration 384 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:09:59,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:09:59,510 INFO L82 PathProgramCache]: Analyzing trace with hash 111355709, now seen corresponding path program 229 times [2021-06-05 15:09:59,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:09:59,511 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840098042] [2021-06-05 15:09:59,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:09:59,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:59,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:59,600 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:09:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840098042] [2021-06-05 15:09:59,600 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840098042] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:59,600 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900264400] [2021-06-05 15:09:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 384 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:09:59,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:09:59,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:09:59,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:09:59,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:59,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:09:59,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:09:59,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:09:59,707 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:09:59,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:09:59,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:09:59,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900264400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:09:59,806 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:09:59,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:09:59,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840205735] [2021-06-05 15:09:59,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:09:59,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:09:59,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:09:59,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:09:59,806 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:00,469 INFO L93 Difference]: Finished difference Result 4169 states and 17319 transitions. [2021-06-05 15:10:00,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:00,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:00,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:00,477 INFO L225 Difference]: With dead ends: 4169 [2021-06-05 15:10:00,477 INFO L226 Difference]: Without dead ends: 4148 [2021-06-05 15:10:00,478 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 562.1ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:00,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4148 states. [2021-06-05 15:10:00,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4148 to 3825. [2021-06-05 15:10:00,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 15:10:00,527 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 15:10:00,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:00,527 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 15:10:00,527 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:00,528 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 15:10:00,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:00,532 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:00,533 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:00,733 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 384 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable840 [2021-06-05 15:10:00,733 INFO L430 AbstractCegarLoop]: === Iteration 385 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:00,733 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:00,733 INFO L82 PathProgramCache]: Analyzing trace with hash 203137755, now seen corresponding path program 230 times [2021-06-05 15:10:00,733 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:00,733 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1384241356] [2021-06-05 15:10:00,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:00,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:00,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:00,818 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1384241356] [2021-06-05 15:10:00,819 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1384241356] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:00,819 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491448804] [2021-06-05 15:10:00,819 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 385 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:00,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:00,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:00,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:00,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:00,964 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:00,964 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:00,965 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,973 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:00,973 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:00,974 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:01,032 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:01,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [491448804] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:01,033 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:01,033 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:01,033 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037343078] [2021-06-05 15:10:01,033 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:01,033 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:01,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:01,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:01,033 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:01,807 INFO L93 Difference]: Finished difference Result 4275 states and 17767 transitions. [2021-06-05 15:10:01,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:01,807 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:01,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:01,815 INFO L225 Difference]: With dead ends: 4275 [2021-06-05 15:10:01,815 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 15:10:01,815 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 507.8ms TimeCoverageRelationStatistics Valid=118, Invalid=638, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:10:01,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 15:10:01,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3831. [2021-06-05 15:10:01,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186945169712794) internal successors, (16036), 3830 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16036 transitions. [2021-06-05 15:10:01,867 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16036 transitions. Word has length 23 [2021-06-05 15:10:01,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:01,867 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16036 transitions. [2021-06-05 15:10:01,867 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:01,867 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16036 transitions. [2021-06-05 15:10:01,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:01,872 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:01,872 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:02,072 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable842,385 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:02,072 INFO L430 AbstractCegarLoop]: === Iteration 386 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:02,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:02,073 INFO L82 PathProgramCache]: Analyzing trace with hash 788471707, now seen corresponding path program 231 times [2021-06-05 15:10:02,073 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:02,073 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958718860] [2021-06-05 15:10:02,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:02,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:02,161 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:02,161 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958718860] [2021-06-05 15:10:02,161 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [958718860] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:02,161 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566384035] [2021-06-05 15:10:02,161 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 386 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:02,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:10:02,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:02,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:02,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:02,262 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:02,262 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:02,263 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:02,271 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:02,271 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:02,272 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:02,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:02,350 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [566384035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:02,350 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:02,350 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:02,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966579166] [2021-06-05 15:10:02,350 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:02,350 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:02,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:02,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:02,350 INFO L87 Difference]: Start difference. First operand 3831 states and 16036 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:02,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:02,951 INFO L93 Difference]: Finished difference Result 4212 states and 17485 transitions. [2021-06-05 15:10:02,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:10:02,951 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:02,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:02,959 INFO L225 Difference]: With dead ends: 4212 [2021-06-05 15:10:02,959 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 15:10:02,959 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 476.4ms TimeCoverageRelationStatistics Valid=151, Invalid=719, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:10:02,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 15:10:02,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3835. [2021-06-05 15:10:03,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.186750130412102) internal successors, (16052), 3834 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16052 transitions. [2021-06-05 15:10:03,011 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16052 transitions. Word has length 23 [2021-06-05 15:10:03,011 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:03,011 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16052 transitions. [2021-06-05 15:10:03,011 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:03,011 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16052 transitions. [2021-06-05 15:10:03,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:03,016 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:03,016 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:03,218 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 386 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable844 [2021-06-05 15:10:03,218 INFO L430 AbstractCegarLoop]: === Iteration 387 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:03,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:03,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1892928855, now seen corresponding path program 232 times [2021-06-05 15:10:03,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:03,219 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [420579476] [2021-06-05 15:10:03,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:03,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:03,307 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:03,307 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:03,307 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [420579476] [2021-06-05 15:10:03,308 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [420579476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:03,308 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1291625658] [2021-06-05 15:10:03,308 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 387 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:03,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:03,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:03,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:03,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:03,411 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:03,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:03,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:03,420 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:03,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:03,421 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:03,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:03,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1291625658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:03,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:03,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:03,501 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [334348525] [2021-06-05 15:10:03,501 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:03,501 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:03,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:03,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:03,501 INFO L87 Difference]: Start difference. First operand 3835 states and 16052 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:04,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:04,404 INFO L93 Difference]: Finished difference Result 4196 states and 17433 transitions. [2021-06-05 15:10:04,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:04,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:04,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:04,413 INFO L225 Difference]: With dead ends: 4196 [2021-06-05 15:10:04,414 INFO L226 Difference]: Without dead ends: 4175 [2021-06-05 15:10:04,414 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 672.4ms TimeCoverageRelationStatistics Valid=164, Invalid=766, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:10:04,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4175 states. [2021-06-05 15:10:04,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4175 to 3827. [2021-06-05 15:10:04,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186617877679038) internal successors, (16018), 3826 states have internal predecessors, (16018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:04,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16018 transitions. [2021-06-05 15:10:04,471 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16018 transitions. Word has length 23 [2021-06-05 15:10:04,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:04,471 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16018 transitions. [2021-06-05 15:10:04,471 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:04,471 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16018 transitions. [2021-06-05 15:10:04,477 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:04,477 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:04,477 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:04,677 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable846,387 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:04,677 INFO L430 AbstractCegarLoop]: === Iteration 388 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:04,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:04,678 INFO L82 PathProgramCache]: Analyzing trace with hash -24083625, now seen corresponding path program 233 times [2021-06-05 15:10:04,678 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:04,678 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897992748] [2021-06-05 15:10:04,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:04,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:04,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:04,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897992748] [2021-06-05 15:10:04,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [897992748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556664017] [2021-06-05 15:10:04,765 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 388 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:04,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:10:04,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:04,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:04,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:04,886 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:04,886 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:04,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:04,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:04,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:04,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:04,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:04,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [556664017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:04,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:04,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:04,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121823265] [2021-06-05 15:10:04,957 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:04,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:04,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:04,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:04,958 INFO L87 Difference]: Start difference. First operand 3827 states and 16018 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:05,565 INFO L93 Difference]: Finished difference Result 4286 states and 17806 transitions. [2021-06-05 15:10:05,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:05,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:05,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:05,574 INFO L225 Difference]: With dead ends: 4286 [2021-06-05 15:10:05,574 INFO L226 Difference]: Without dead ends: 4264 [2021-06-05 15:10:05,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 465.1ms TimeCoverageRelationStatistics Valid=120, Invalid=636, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:10:05,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4264 states. [2021-06-05 15:10:05,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4264 to 3831. [2021-06-05 15:10:05,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186945169712794) internal successors, (16036), 3830 states have internal predecessors, (16036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16036 transitions. [2021-06-05 15:10:05,630 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16036 transitions. Word has length 23 [2021-06-05 15:10:05,630 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:05,630 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16036 transitions. [2021-06-05 15:10:05,630 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:05,630 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16036 transitions. [2021-06-05 15:10:05,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:05,636 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:05,636 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:05,836 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 388 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable848 [2021-06-05 15:10:05,836 INFO L430 AbstractCegarLoop]: === Iteration 389 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:05,836 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:05,836 INFO L82 PathProgramCache]: Analyzing trace with hash 489443227, now seen corresponding path program 234 times [2021-06-05 15:10:05,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:05,837 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269767693] [2021-06-05 15:10:05,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:05,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:05,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:05,928 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269767693] [2021-06-05 15:10:05,929 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269767693] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:05,929 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300047264] [2021-06-05 15:10:05,929 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 389 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:05,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:10:05,954 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:05,954 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:05,955 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:06,037 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:06,064 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:06,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:10:06,066 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:06,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:06,078 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:06,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:10:06,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:06,172 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300047264] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:06,172 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:06,172 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:06,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1596186103] [2021-06-05 15:10:06,173 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:06,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:06,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:06,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:06,173 INFO L87 Difference]: Start difference. First operand 3831 states and 16036 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:06,743 INFO L93 Difference]: Finished difference Result 4224 states and 17548 transitions. [2021-06-05 15:10:06,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:10:06,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:06,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:06,750 INFO L225 Difference]: With dead ends: 4224 [2021-06-05 15:10:06,750 INFO L226 Difference]: Without dead ends: 4199 [2021-06-05 15:10:06,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 476.3ms TimeCoverageRelationStatistics Valid=142, Invalid=850, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:10:06,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-06-05 15:10:06,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3835. [2021-06-05 15:10:06,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.186750130412102) internal successors, (16052), 3834 states have internal predecessors, (16052), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16052 transitions. [2021-06-05 15:10:06,800 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16052 transitions. Word has length 23 [2021-06-05 15:10:06,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:06,800 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16052 transitions. [2021-06-05 15:10:06,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:06,801 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16052 transitions. [2021-06-05 15:10:06,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:06,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:06,806 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:07,006 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 389 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable850 [2021-06-05 15:10:07,006 INFO L430 AbstractCegarLoop]: === Iteration 390 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:07,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:07,006 INFO L82 PathProgramCache]: Analyzing trace with hash 1565154383, now seen corresponding path program 235 times [2021-06-05 15:10:07,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:07,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073506756] [2021-06-05 15:10:07,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:07,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:07,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:07,097 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073506756] [2021-06-05 15:10:07,097 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073506756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:07,097 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839823212] [2021-06-05 15:10:07,097 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 390 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:07,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:07,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:07,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:07,199 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:07,199 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:07,200 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:07,208 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:07,208 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:07,208 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:07,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:07,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1839823212] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:07,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:07,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:07,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055799097] [2021-06-05 15:10:07,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:07,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:07,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:07,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:07,287 INFO L87 Difference]: Start difference. First operand 3835 states and 16052 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:08,036 INFO L93 Difference]: Finished difference Result 4220 states and 17527 transitions. [2021-06-05 15:10:08,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:08,036 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:08,036 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:08,043 INFO L225 Difference]: With dead ends: 4220 [2021-06-05 15:10:08,043 INFO L226 Difference]: Without dead ends: 4199 [2021-06-05 15:10:08,043 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 654.6ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:10:08,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4199 states. [2021-06-05 15:10:08,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4199 to 3827. [2021-06-05 15:10:08,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186617877679038) internal successors, (16018), 3826 states have internal predecessors, (16018), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16018 transitions. [2021-06-05 15:10:08,094 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16018 transitions. Word has length 23 [2021-06-05 15:10:08,094 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:08,094 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16018 transitions. [2021-06-05 15:10:08,094 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:08,094 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16018 transitions. [2021-06-05 15:10:08,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:08,099 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:08,099 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:08,299 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 390 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable854 [2021-06-05 15:10:08,299 INFO L430 AbstractCegarLoop]: === Iteration 391 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:08,299 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:08,299 INFO L82 PathProgramCache]: Analyzing trace with hash 1846150235, now seen corresponding path program 236 times [2021-06-05 15:10:08,299 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:08,300 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134376100] [2021-06-05 15:10:08,300 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:08,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:08,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:08,392 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134376100] [2021-06-05 15:10:08,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1134376100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:08,392 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1531312478] [2021-06-05 15:10:08,392 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 391 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:08,416 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:08,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:08,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:08,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:08,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:08,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:08,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:08,495 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:08,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:08,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:08,595 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:08,595 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1531312478] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:08,595 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:08,595 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:08,595 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230091603] [2021-06-05 15:10:08,595 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:08,595 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:08,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:08,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:08,595 INFO L87 Difference]: Start difference. First operand 3827 states and 16018 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:09,102 INFO L93 Difference]: Finished difference Result 4116 states and 17113 transitions. [2021-06-05 15:10:09,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:10:09,102 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:09,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:09,109 INFO L225 Difference]: With dead ends: 4116 [2021-06-05 15:10:09,109 INFO L226 Difference]: Without dead ends: 4090 [2021-06-05 15:10:09,109 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 389.9ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:09,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4090 states. [2021-06-05 15:10:09,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4090 to 3836. [2021-06-05 15:10:09,150 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 4.185136897001303) internal successors, (16050), 3835 states have internal predecessors, (16050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 16050 transitions. [2021-06-05 15:10:09,159 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 16050 transitions. Word has length 23 [2021-06-05 15:10:09,159 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:09,159 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 16050 transitions. [2021-06-05 15:10:09,159 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:09,159 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 16050 transitions. [2021-06-05 15:10:09,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:09,164 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:09,164 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:09,364 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable856,391 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:09,364 INFO L430 AbstractCegarLoop]: === Iteration 392 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:09,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:09,364 INFO L82 PathProgramCache]: Analyzing trace with hash 804574167, now seen corresponding path program 237 times [2021-06-05 15:10:09,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:09,364 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1615548467] [2021-06-05 15:10:09,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:09,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:09,458 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:09,458 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:09,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1615548467] [2021-06-05 15:10:09,458 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1615548467] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:09,458 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1647517479] [2021-06-05 15:10:09,458 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 392 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:09,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:09,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:09,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:09,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:09,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:09,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:09,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:09,556 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:09,556 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:09,556 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:10:09,636 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:09,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1647517479] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:09,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:09,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:09,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1481126162] [2021-06-05 15:10:09,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:09,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:09,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:09,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:09,637 INFO L87 Difference]: Start difference. First operand 3836 states and 16050 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:10,079 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:10,079 INFO L93 Difference]: Finished difference Result 4145 states and 17217 transitions. [2021-06-05 15:10:10,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:10:10,080 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:10,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:10,087 INFO L225 Difference]: With dead ends: 4145 [2021-06-05 15:10:10,087 INFO L226 Difference]: Without dead ends: 4117 [2021-06-05 15:10:10,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 320.4ms TimeCoverageRelationStatistics Valid=91, Invalid=461, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:10:10,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-06-05 15:10:10,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3829. [2021-06-05 15:10:10,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186520376175548) internal successors, (16026), 3828 states have internal predecessors, (16026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:10,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16026 transitions. [2021-06-05 15:10:10,139 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16026 transitions. Word has length 23 [2021-06-05 15:10:10,139 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:10,139 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16026 transitions. [2021-06-05 15:10:10,139 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:10,139 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16026 transitions. [2021-06-05 15:10:10,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:10,144 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:10,144 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:10,345 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 392 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable858 [2021-06-05 15:10:10,345 INFO L430 AbstractCegarLoop]: === Iteration 393 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:10,345 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:10,345 INFO L82 PathProgramCache]: Analyzing trace with hash 517452815, now seen corresponding path program 238 times [2021-06-05 15:10:10,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:10,345 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690226732] [2021-06-05 15:10:10,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:10,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:10,437 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:10,437 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:10,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690226732] [2021-06-05 15:10:10,437 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1690226732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:10,437 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860701723] [2021-06-05 15:10:10,437 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 393 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:10,461 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:10,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:10,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:10,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:10,525 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:10,525 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:10,526 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:10,534 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:10,535 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:10,535 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:10,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:10,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860701723] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:10,633 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:10,633 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:10,633 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877511002] [2021-06-05 15:10:10,633 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:10,633 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:10,633 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:10,633 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:10,633 INFO L87 Difference]: Start difference. First operand 3829 states and 16026 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:11,109 INFO L93 Difference]: Finished difference Result 4136 states and 17183 transitions. [2021-06-05 15:10:11,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:10:11,109 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:11,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:11,116 INFO L225 Difference]: With dead ends: 4136 [2021-06-05 15:10:11,116 INFO L226 Difference]: Without dead ends: 4110 [2021-06-05 15:10:11,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 438.9ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:10:11,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4110 states. [2021-06-05 15:10:11,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4110 to 3833. [2021-06-05 15:10:11,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.1863256784968685) internal successors, (16042), 3832 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16042 transitions. [2021-06-05 15:10:11,165 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16042 transitions. Word has length 23 [2021-06-05 15:10:11,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:11,165 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16042 transitions. [2021-06-05 15:10:11,165 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:11,165 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16042 transitions. [2021-06-05 15:10:11,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:11,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:11,170 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:11,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable859,393 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:11,371 INFO L430 AbstractCegarLoop]: === Iteration 394 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:11,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:11,371 INFO L82 PathProgramCache]: Analyzing trace with hash 24235429, now seen corresponding path program 239 times [2021-06-05 15:10:11,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:11,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1360018992] [2021-06-05 15:10:11,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:11,463 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:11,463 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:11,463 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1360018992] [2021-06-05 15:10:11,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1360018992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:11,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287675468] [2021-06-05 15:10:11,464 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 394 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:11,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:11,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:11,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:11,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:11,576 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:11,576 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:11,577 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:11,586 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:11,586 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:11,586 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:11,685 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:11,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [287675468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:11,685 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:11,685 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:11,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309673866] [2021-06-05 15:10:11,685 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:11,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:11,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:11,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:11,685 INFO L87 Difference]: Start difference. First operand 3833 states and 16042 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:12,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:12,297 INFO L93 Difference]: Finished difference Result 4121 states and 17133 transitions. [2021-06-05 15:10:12,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:12,298 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:12,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:12,305 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 15:10:12,305 INFO L226 Difference]: Without dead ends: 4100 [2021-06-05 15:10:12,305 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 589.7ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:12,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-06-05 15:10:12,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3829. [2021-06-05 15:10:12,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.186520376175548) internal successors, (16026), 3828 states have internal predecessors, (16026), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:12,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16026 transitions. [2021-06-05 15:10:12,355 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16026 transitions. Word has length 23 [2021-06-05 15:10:12,355 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:12,355 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16026 transitions. [2021-06-05 15:10:12,355 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:12,355 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16026 transitions. [2021-06-05 15:10:12,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:12,360 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:12,360 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:12,560 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 394 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable861 [2021-06-05 15:10:12,560 INFO L430 AbstractCegarLoop]: === Iteration 395 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:12,560 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:12,560 INFO L82 PathProgramCache]: Analyzing trace with hash 959011685, now seen corresponding path program 240 times [2021-06-05 15:10:12,560 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:12,560 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669956017] [2021-06-05 15:10:12,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:12,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:12,656 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:12,656 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:12,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669956017] [2021-06-05 15:10:12,656 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1669956017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:12,656 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1440145968] [2021-06-05 15:10:12,656 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 395 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:12,681 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:12,681 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:12,682 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:12,682 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:12,752 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:12,771 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:12,771 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:10:12,773 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:12,786 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:12,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:12,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 15:10:12,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:12,896 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1440145968] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:12,896 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:12,896 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:12,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593771908] [2021-06-05 15:10:12,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:12,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:12,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:12,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:12,896 INFO L87 Difference]: Start difference. First operand 3829 states and 16026 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:13,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:13,453 INFO L93 Difference]: Finished difference Result 4134 states and 17192 transitions. [2021-06-05 15:10:13,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:10:13,454 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:13,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:13,461 INFO L225 Difference]: With dead ends: 4134 [2021-06-05 15:10:13,461 INFO L226 Difference]: Without dead ends: 4109 [2021-06-05 15:10:13,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 432.3ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:13,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4109 states. [2021-06-05 15:10:13,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4109 to 3833. [2021-06-05 15:10:13,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.1863256784968685) internal successors, (16042), 3832 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:13,511 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16042 transitions. [2021-06-05 15:10:13,511 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16042 transitions. Word has length 23 [2021-06-05 15:10:13,511 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:13,511 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16042 transitions. [2021-06-05 15:10:13,511 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:13,511 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16042 transitions. [2021-06-05 15:10:13,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:13,516 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:13,516 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:13,716 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable863,395 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:13,716 INFO L430 AbstractCegarLoop]: === Iteration 396 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:13,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:13,717 INFO L82 PathProgramCache]: Analyzing trace with hash -53680847, now seen corresponding path program 241 times [2021-06-05 15:10:13,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:13,717 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157255350] [2021-06-05 15:10:13,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:13,718 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:13,813 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:13,813 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:13,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157255350] [2021-06-05 15:10:13,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1157255350] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:13,813 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702168447] [2021-06-05 15:10:13,813 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 396 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:13,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:13,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:13,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:13,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:13,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:13,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:13,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:13,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:13,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:14,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:14,011 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702168447] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:14,012 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:14,012 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:14,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609047905] [2021-06-05 15:10:14,012 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:14,012 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:14,012 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:14,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:14,012 INFO L87 Difference]: Start difference. First operand 3833 states and 16042 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:14,681 INFO L93 Difference]: Finished difference Result 4144 states and 17224 transitions. [2021-06-05 15:10:14,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:14,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:14,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:14,688 INFO L225 Difference]: With dead ends: 4144 [2021-06-05 15:10:14,688 INFO L226 Difference]: Without dead ends: 4123 [2021-06-05 15:10:14,688 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 613.8ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:14,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4123 states. [2021-06-05 15:10:14,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4123 to 3825. [2021-06-05 15:10:14,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3825 states, 3824 states have (on average 4.1864539748953975) internal successors, (16009), 3824 states have internal predecessors, (16009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3825 states to 3825 states and 16009 transitions. [2021-06-05 15:10:14,738 INFO L78 Accepts]: Start accepts. Automaton has 3825 states and 16009 transitions. Word has length 23 [2021-06-05 15:10:14,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:14,738 INFO L482 AbstractCegarLoop]: Abstraction has 3825 states and 16009 transitions. [2021-06-05 15:10:14,738 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:14,738 INFO L276 IsEmpty]: Start isEmpty. Operand 3825 states and 16009 transitions. [2021-06-05 15:10:14,743 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:14,743 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:14,743 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:14,943 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable867,396 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:14,943 INFO L430 AbstractCegarLoop]: === Iteration 397 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:14,943 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:14,944 INFO L82 PathProgramCache]: Analyzing trace with hash -872706097, now seen corresponding path program 242 times [2021-06-05 15:10:14,944 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:14,944 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [476549507] [2021-06-05 15:10:14,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:14,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:15,030 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:15,030 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:15,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [476549507] [2021-06-05 15:10:15,030 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [476549507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,030 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819772359] [2021-06-05 15:10:15,030 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 397 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:15,055 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:15,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:15,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:15,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:15,143 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:15,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:15,144 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,152 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:15,152 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:15,152 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:15,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:15,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819772359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:15,210 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:15,210 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:15,210 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059202620] [2021-06-05 15:10:15,210 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:15,210 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:15,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:15,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:15,211 INFO L87 Difference]: Start difference. First operand 3825 states and 16009 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:15,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:15,942 INFO L93 Difference]: Finished difference Result 4650 states and 19251 transitions. [2021-06-05 15:10:15,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:15,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:15,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:15,951 INFO L225 Difference]: With dead ends: 4650 [2021-06-05 15:10:15,951 INFO L226 Difference]: Without dead ends: 4628 [2021-06-05 15:10:15,951 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 499.3ms TimeCoverageRelationStatistics Valid=152, Invalid=718, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:10:15,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4628 states. [2021-06-05 15:10:15,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4628 to 3831. [2021-06-05 15:10:15,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.186422976501306) internal successors, (16034), 3830 states have internal predecessors, (16034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16034 transitions. [2021-06-05 15:10:16,004 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16034 transitions. Word has length 23 [2021-06-05 15:10:16,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:16,004 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16034 transitions. [2021-06-05 15:10:16,004 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:16,004 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16034 transitions. [2021-06-05 15:10:16,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:16,009 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:16,009 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:16,209 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 397 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable869 [2021-06-05 15:10:16,209 INFO L430 AbstractCegarLoop]: === Iteration 398 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:16,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:16,210 INFO L82 PathProgramCache]: Analyzing trace with hash -359179245, now seen corresponding path program 243 times [2021-06-05 15:10:16,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:16,210 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714710065] [2021-06-05 15:10:16,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:16,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:16,301 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:16,301 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:16,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714710065] [2021-06-05 15:10:16,301 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714710065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:16,301 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508551118] [2021-06-05 15:10:16,301 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 398 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:16,325 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:10:16,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:16,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:16,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:16,403 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:16,425 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:16,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:10:16,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:16,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:16,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:16,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:40 [2021-06-05 15:10:16,532 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:16,532 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [508551118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:16,532 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:16,532 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:16,532 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198450043] [2021-06-05 15:10:16,532 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:16,532 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:16,532 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:16,533 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:16,533 INFO L87 Difference]: Start difference. First operand 3831 states and 16034 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,284 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:17,284 INFO L93 Difference]: Finished difference Result 4429 states and 18354 transitions. [2021-06-05 15:10:17,284 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:10:17,284 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:17,284 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:17,292 INFO L225 Difference]: With dead ends: 4429 [2021-06-05 15:10:17,292 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 15:10:17,292 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:10:17,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 15:10:17,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3835. [2021-06-05 15:10:17,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.18622848200313) internal successors, (16050), 3834 states have internal predecessors, (16050), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16050 transitions. [2021-06-05 15:10:17,344 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16050 transitions. Word has length 23 [2021-06-05 15:10:17,344 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:17,344 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16050 transitions. [2021-06-05 15:10:17,344 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:17,344 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16050 transitions. [2021-06-05 15:10:17,349 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:17,349 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:17,349 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:17,549 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 398 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable871 [2021-06-05 15:10:17,550 INFO L430 AbstractCegarLoop]: === Iteration 399 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:17,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:17,550 INFO L82 PathProgramCache]: Analyzing trace with hash 716531911, now seen corresponding path program 244 times [2021-06-05 15:10:17,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:17,550 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128335793] [2021-06-05 15:10:17,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:17,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:17,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:17,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128335793] [2021-06-05 15:10:17,641 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128335793] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:17,641 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [996624707] [2021-06-05 15:10:17,641 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 399 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:17,664 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:17,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:17,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:17,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:17,739 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:17,739 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:17,740 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:17,748 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:17,748 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:17,748 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:17,825 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:17,826 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [996624707] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:17,826 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:17,826 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:17,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1608990594] [2021-06-05 15:10:17,826 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:17,826 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:17,826 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:17,826 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:17,826 INFO L87 Difference]: Start difference. First operand 3835 states and 16050 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:18,589 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:18,590 INFO L93 Difference]: Finished difference Result 4490 states and 18593 transitions. [2021-06-05 15:10:18,590 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:10:18,590 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:18,590 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:18,598 INFO L225 Difference]: With dead ends: 4490 [2021-06-05 15:10:18,598 INFO L226 Difference]: Without dead ends: 4469 [2021-06-05 15:10:18,598 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 633.0ms TimeCoverageRelationStatistics Valid=195, Invalid=797, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:10:18,602 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4469 states. [2021-06-05 15:10:18,640 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4469 to 3827. [2021-06-05 15:10:18,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3827 states, 3826 states have (on average 4.186095138525876) internal successors, (16016), 3826 states have internal predecessors, (16016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:18,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3827 states to 3827 states and 16016 transitions. [2021-06-05 15:10:18,651 INFO L78 Accepts]: Start accepts. Automaton has 3827 states and 16016 transitions. Word has length 23 [2021-06-05 15:10:18,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:18,651 INFO L482 AbstractCegarLoop]: Abstraction has 3827 states and 16016 transitions. [2021-06-05 15:10:18,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:18,651 INFO L276 IsEmpty]: Start isEmpty. Operand 3827 states and 16016 transitions. [2021-06-05 15:10:18,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:18,656 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:18,656 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:18,856 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 399 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable875 [2021-06-05 15:10:18,857 INFO L430 AbstractCegarLoop]: === Iteration 400 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:18,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:18,857 INFO L82 PathProgramCache]: Analyzing trace with hash -463198599, now seen corresponding path program 245 times [2021-06-05 15:10:18,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:18,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175152418] [2021-06-05 15:10:18,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:18,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:18,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:18,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:18,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175152418] [2021-06-05 15:10:18,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1175152418] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:18,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1512479462] [2021-06-05 15:10:18,943 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 400 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:18,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:18,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:18,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:18,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:19,049 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:19,050 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:19,051 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:19,058 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:19,059 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:19,059 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:19,118 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:19,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1512479462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:19,119 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:19,119 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:19,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648502621] [2021-06-05 15:10:19,119 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:19,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:19,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:19,119 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:19,119 INFO L87 Difference]: Start difference. First operand 3827 states and 16016 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:19,830 INFO L93 Difference]: Finished difference Result 4644 states and 19191 transitions. [2021-06-05 15:10:19,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:10:19,831 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:19,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:19,838 INFO L225 Difference]: With dead ends: 4644 [2021-06-05 15:10:19,838 INFO L226 Difference]: Without dead ends: 4613 [2021-06-05 15:10:19,838 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 489.9ms TimeCoverageRelationStatistics Valid=178, Invalid=878, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:19,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4613 states. [2021-06-05 15:10:19,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4613 to 3833. [2021-06-05 15:10:19,887 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.187630480167015) internal successors, (16047), 3832 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16047 transitions. [2021-06-05 15:10:19,896 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16047 transitions. Word has length 23 [2021-06-05 15:10:19,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:19,896 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16047 transitions. [2021-06-05 15:10:19,896 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:19,896 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16047 transitions. [2021-06-05 15:10:19,901 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:19,901 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:19,901 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:20,117 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 400 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable877 [2021-06-05 15:10:20,117 INFO L430 AbstractCegarLoop]: === Iteration 401 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:20,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:20,117 INFO L82 PathProgramCache]: Analyzing trace with hash 124546723, now seen corresponding path program 246 times [2021-06-05 15:10:20,117 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:20,117 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534726983] [2021-06-05 15:10:20,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:20,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:20,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:20,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534726983] [2021-06-05 15:10:20,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1534726983] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:20,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561314078] [2021-06-05 15:10:20,210 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 401 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:20,234 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:10:20,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:20,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:20,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:20,304 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:20,310 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:20,310 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 29 treesize of output 35 [2021-06-05 15:10:20,311 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:20,320 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:20,320 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:20,320 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:36 [2021-06-05 15:10:20,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:20,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1561314078] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:20,388 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:20,388 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:10:20,388 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368593513] [2021-06-05 15:10:20,388 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:10:20,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:20,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:10:20,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:10:20,388 INFO L87 Difference]: Start difference. First operand 3833 states and 16047 transitions. Second operand has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:20,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:20,858 INFO L93 Difference]: Finished difference Result 4233 states and 17591 transitions. [2021-06-05 15:10:20,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:20,858 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:20,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:20,865 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 15:10:20,865 INFO L226 Difference]: Without dead ends: 4208 [2021-06-05 15:10:20,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 344.0ms TimeCoverageRelationStatistics Valid=115, Invalid=485, Unknown=0, NotChecked=0, Total=600 [2021-06-05 15:10:20,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4208 states. [2021-06-05 15:10:20,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4208 to 3833. [2021-06-05 15:10:20,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.187630480167015) internal successors, (16047), 3832 states have internal predecessors, (16047), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:20,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16047 transitions. [2021-06-05 15:10:20,918 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16047 transitions. Word has length 23 [2021-06-05 15:10:20,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:20,918 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16047 transitions. [2021-06-05 15:10:20,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.111111111111111) internal successors, (38), 17 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:20,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16047 transitions. [2021-06-05 15:10:20,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:20,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:20,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:21,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable879,401 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:21,123 INFO L430 AbstractCegarLoop]: === Iteration 402 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:21,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:21,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1200257879, now seen corresponding path program 247 times [2021-06-05 15:10:21,123 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:21,123 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379060706] [2021-06-05 15:10:21,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:21,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:21,224 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:21,224 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:21,224 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379060706] [2021-06-05 15:10:21,225 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379060706] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:21,225 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615951985] [2021-06-05 15:10:21,225 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 402 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:21,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:21,285 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:21,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:21,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:21,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:21,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:21,366 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:21,367 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:21,367 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:21,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:21,444 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [615951985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:21,444 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:21,444 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:21,444 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159303832] [2021-06-05 15:10:21,444 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:21,444 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:21,445 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:21,445 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:21,445 INFO L87 Difference]: Start difference. First operand 3833 states and 16047 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:22,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:22,160 INFO L93 Difference]: Finished difference Result 4388 states and 18200 transitions. [2021-06-05 15:10:22,160 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:10:22,161 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:22,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:22,168 INFO L225 Difference]: With dead ends: 4388 [2021-06-05 15:10:22,168 INFO L226 Difference]: Without dead ends: 4367 [2021-06-05 15:10:22,168 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 580.1ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:10:22,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4367 states. [2021-06-05 15:10:22,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4367 to 3829. [2021-06-05 15:10:22,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3829 states, 3828 states have (on average 4.188610240334378) internal successors, (16034), 3828 states have internal predecessors, (16034), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:22,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3829 states to 3829 states and 16034 transitions. [2021-06-05 15:10:22,221 INFO L78 Accepts]: Start accepts. Automaton has 3829 states and 16034 transitions. Word has length 23 [2021-06-05 15:10:22,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:22,221 INFO L482 AbstractCegarLoop]: Abstraction has 3829 states and 16034 transitions. [2021-06-05 15:10:22,221 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:22,221 INFO L276 IsEmpty]: Start isEmpty. Operand 3829 states and 16034 transitions. [2021-06-05 15:10:22,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:22,226 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:22,226 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:22,426 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable880,402 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:22,426 INFO L430 AbstractCegarLoop]: === Iteration 403 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:22,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:22,427 INFO L82 PathProgramCache]: Analyzing trace with hash 936545277, now seen corresponding path program 248 times [2021-06-05 15:10:22,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:22,427 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137382781] [2021-06-05 15:10:22,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:22,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:22,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137382781] [2021-06-05 15:10:22,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137382781] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:22,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772972892] [2021-06-05 15:10:22,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 403 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:22,538 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:22,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:22,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:22,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:22,615 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:22,615 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:22,616 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:22,625 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:22,626 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:22,626 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:10:22,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:22,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [772972892] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:22,706 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:22,706 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:22,706 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032350280] [2021-06-05 15:10:22,706 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:22,706 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:22,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:22,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:22,706 INFO L87 Difference]: Start difference. First operand 3829 states and 16034 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:23,167 INFO L93 Difference]: Finished difference Result 4121 states and 17136 transitions. [2021-06-05 15:10:23,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:10:23,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:23,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:23,174 INFO L225 Difference]: With dead ends: 4121 [2021-06-05 15:10:23,174 INFO L226 Difference]: Without dead ends: 4095 [2021-06-05 15:10:23,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 378.3ms TimeCoverageRelationStatistics Valid=120, Invalid=530, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4095 states. [2021-06-05 15:10:23,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4095 to 3843. [2021-06-05 15:10:23,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3843 states, 3842 states have (on average 4.187662675689745) internal successors, (16089), 3842 states have internal predecessors, (16089), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3843 states to 3843 states and 16089 transitions. [2021-06-05 15:10:23,224 INFO L78 Accepts]: Start accepts. Automaton has 3843 states and 16089 transitions. Word has length 23 [2021-06-05 15:10:23,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:23,224 INFO L482 AbstractCegarLoop]: Abstraction has 3843 states and 16089 transitions. [2021-06-05 15:10:23,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:23,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3843 states and 16089 transitions. [2021-06-05 15:10:23,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:23,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:23,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:23,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 403 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable882 [2021-06-05 15:10:23,429 INFO L430 AbstractCegarLoop]: === Iteration 404 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:23,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:23,429 INFO L82 PathProgramCache]: Analyzing trace with hash -105030791, now seen corresponding path program 249 times [2021-06-05 15:10:23,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:23,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87203151] [2021-06-05 15:10:23,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:23,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:23,518 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:23,518 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87203151] [2021-06-05 15:10:23,518 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87203151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:23,518 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2067166732] [2021-06-05 15:10:23,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 404 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:23,543 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:23,543 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:23,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:23,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:23,622 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:23,622 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:23,624 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:23,632 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:23,633 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:23,633 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:10:23,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:23,714 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2067166732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:23,714 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:23,714 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:23,714 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171393142] [2021-06-05 15:10:23,714 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:23,714 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:23,715 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:23,715 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:23,715 INFO L87 Difference]: Start difference. First operand 3843 states and 16089 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:24,232 INFO L93 Difference]: Finished difference Result 4177 states and 17349 transitions. [2021-06-05 15:10:24,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:10:24,233 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:24,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:24,240 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 15:10:24,240 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 15:10:24,240 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 443.8ms TimeCoverageRelationStatistics Valid=126, Invalid=576, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:10:24,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 15:10:24,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3836. [2021-06-05 15:10:24,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3836 states, 3835 states have (on average 4.188265971316818) internal successors, (16062), 3835 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3836 states to 3836 states and 16062 transitions. [2021-06-05 15:10:24,290 INFO L78 Accepts]: Start accepts. Automaton has 3836 states and 16062 transitions. Word has length 23 [2021-06-05 15:10:24,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:24,290 INFO L482 AbstractCegarLoop]: Abstraction has 3836 states and 16062 transitions. [2021-06-05 15:10:24,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:24,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3836 states and 16062 transitions. [2021-06-05 15:10:24,295 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:24,295 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:24,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:24,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 404 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable884 [2021-06-05 15:10:24,496 INFO L430 AbstractCegarLoop]: === Iteration 405 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:24,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:24,496 INFO L82 PathProgramCache]: Analyzing trace with hash -990829071, now seen corresponding path program 250 times [2021-06-05 15:10:24,496 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:24,496 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690027035] [2021-06-05 15:10:24,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:24,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:24,583 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:24,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690027035] [2021-06-05 15:10:24,583 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690027035] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:24,583 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1587378725] [2021-06-05 15:10:24,583 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 405 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:24,607 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:24,607 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:24,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:24,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:24,721 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:24,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:24,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:24,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:24,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:24,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:24,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:24,792 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1587378725] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:24,792 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:24,792 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:24,792 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [233165087] [2021-06-05 15:10:24,792 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:24,793 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:24,793 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:24,793 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:24,793 INFO L87 Difference]: Start difference. First operand 3836 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:25,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:25,363 INFO L93 Difference]: Finished difference Result 4316 states and 17895 transitions. [2021-06-05 15:10:25,363 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:10:25,363 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:25,363 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:25,370 INFO L225 Difference]: With dead ends: 4316 [2021-06-05 15:10:25,370 INFO L226 Difference]: Without dead ends: 4282 [2021-06-05 15:10:25,371 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 411.5ms TimeCoverageRelationStatistics Valid=139, Invalid=731, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:10:25,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4282 states. [2021-06-05 15:10:25,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4282 to 3833. [2021-06-05 15:10:25,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.189457202505219) internal successors, (16054), 3832 states have internal predecessors, (16054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:25,421 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16054 transitions. [2021-06-05 15:10:25,421 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16054 transitions. Word has length 23 [2021-06-05 15:10:25,421 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:25,421 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16054 transitions. [2021-06-05 15:10:25,421 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:25,421 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16054 transitions. [2021-06-05 15:10:25,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:25,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:25,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:25,627 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 405 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable886 [2021-06-05 15:10:25,627 INFO L430 AbstractCegarLoop]: === Iteration 406 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:25,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:25,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1175883353, now seen corresponding path program 251 times [2021-06-05 15:10:25,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:25,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024233610] [2021-06-05 15:10:25,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:25,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:25,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:25,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:25,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024233610] [2021-06-05 15:10:25,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2024233610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [877765981] [2021-06-05 15:10:25,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 406 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:25,743 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:10:25,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:25,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:25,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:25,807 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:25,807 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:25,808 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:25,817 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:25,818 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:25,818 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:25,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:25,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [877765981] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:25,917 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:25,917 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:25,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443844298] [2021-06-05 15:10:25,917 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:25,917 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:25,917 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:25,917 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:25,918 INFO L87 Difference]: Start difference. First operand 3833 states and 16054 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:26,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:26,358 INFO L93 Difference]: Finished difference Result 4089 states and 17014 transitions. [2021-06-05 15:10:26,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:10:26,358 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:26,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:26,365 INFO L225 Difference]: With dead ends: 4089 [2021-06-05 15:10:26,366 INFO L226 Difference]: Without dead ends: 4063 [2021-06-05 15:10:26,366 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 386.4ms TimeCoverageRelationStatistics Valid=126, Invalid=524, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:10:26,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4063 states. [2021-06-05 15:10:26,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4063 to 3842. [2021-06-05 15:10:26,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3842 states, 3841 states have (on average 4.187971882322312) internal successors, (16086), 3841 states have internal predecessors, (16086), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:26,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3842 states to 3842 states and 16086 transitions. [2021-06-05 15:10:26,415 INFO L78 Accepts]: Start accepts. Automaton has 3842 states and 16086 transitions. Word has length 23 [2021-06-05 15:10:26,415 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:26,415 INFO L482 AbstractCegarLoop]: Abstraction has 3842 states and 16086 transitions. [2021-06-05 15:10:26,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:26,416 INFO L276 IsEmpty]: Start isEmpty. Operand 3842 states and 16086 transitions. [2021-06-05 15:10:26,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:26,421 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:26,421 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:26,621 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 406 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable888 [2021-06-05 15:10:26,621 INFO L430 AbstractCegarLoop]: === Iteration 407 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:26,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:26,621 INFO L82 PathProgramCache]: Analyzing trace with hash 2077507875, now seen corresponding path program 252 times [2021-06-05 15:10:26,621 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:26,621 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224747150] [2021-06-05 15:10:26,621 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:26,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:26,718 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:26,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:26,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224747150] [2021-06-05 15:10:26,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224747150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:26,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042654] [2021-06-05 15:10:26,719 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 407 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:26,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:26,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:26,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:26,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:26,820 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:26,845 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:10:26,845 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:10:26,847 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:26,862 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:26,863 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:26,863 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:51 [2021-06-05 15:10:26,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:26,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2042654] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:26,977 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:26,977 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:26,977 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2106070064] [2021-06-05 15:10:26,978 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:26,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:26,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:26,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:26,978 INFO L87 Difference]: Start difference. First operand 3842 states and 16086 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:27,589 INFO L93 Difference]: Finished difference Result 4110 states and 17095 transitions. [2021-06-05 15:10:27,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:27,589 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:27,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:27,596 INFO L225 Difference]: With dead ends: 4110 [2021-06-05 15:10:27,596 INFO L226 Difference]: Without dead ends: 4082 [2021-06-05 15:10:27,596 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 408.3ms TimeCoverageRelationStatistics Valid=103, Invalid=653, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:10:27,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4082 states. [2021-06-05 15:10:27,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4082 to 3835. [2021-06-05 15:10:27,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 15:10:27,645 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 15:10:27,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:27,645 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 15:10:27,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:27,645 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 15:10:27,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:27,650 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:27,650 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:27,850 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 407 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable890 [2021-06-05 15:10:27,851 INFO L430 AbstractCegarLoop]: === Iteration 408 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:27,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:27,851 INFO L82 PathProgramCache]: Analyzing trace with hash 1790386523, now seen corresponding path program 253 times [2021-06-05 15:10:27,851 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:27,851 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277821111] [2021-06-05 15:10:27,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:27,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:27,943 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:27,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:27,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277821111] [2021-06-05 15:10:27,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [277821111] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:27,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [865275736] [2021-06-05 15:10:27,943 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 408 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:27,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:27,967 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:27,967 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:28,030 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:28,030 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:28,031 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:28,039 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:28,040 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:28,040 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:28,141 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:28,142 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [865275736] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:28,142 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:28,142 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:28,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1345327416] [2021-06-05 15:10:28,142 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:28,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:28,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:28,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:28,142 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:28,671 INFO L93 Difference]: Finished difference Result 4111 states and 17092 transitions. [2021-06-05 15:10:28,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:10:28,671 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:28,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:28,678 INFO L225 Difference]: With dead ends: 4111 [2021-06-05 15:10:28,679 INFO L226 Difference]: Without dead ends: 4085 [2021-06-05 15:10:28,679 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 438.6ms TimeCoverageRelationStatistics Valid=142, Invalid=614, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:10:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4085 states. [2021-06-05 15:10:28,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4085 to 3839. [2021-06-05 15:10:28,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3839 states, 3838 states have (on average 4.189161021365295) internal successors, (16078), 3838 states have internal predecessors, (16078), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3839 states to 3839 states and 16078 transitions. [2021-06-05 15:10:28,729 INFO L78 Accepts]: Start accepts. Automaton has 3839 states and 16078 transitions. Word has length 23 [2021-06-05 15:10:28,729 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:28,729 INFO L482 AbstractCegarLoop]: Abstraction has 3839 states and 16078 transitions. [2021-06-05 15:10:28,729 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:28,729 INFO L276 IsEmpty]: Start isEmpty. Operand 3839 states and 16078 transitions. [2021-06-05 15:10:28,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:28,734 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:28,734 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:28,935 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable894,408 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:28,935 INFO L430 AbstractCegarLoop]: === Iteration 409 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:28,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:28,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1297169137, now seen corresponding path program 254 times [2021-06-05 15:10:28,935 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:28,935 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336667669] [2021-06-05 15:10:28,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:28,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:29,028 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336667669] [2021-06-05 15:10:29,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336667669] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:29,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276059088] [2021-06-05 15:10:29,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 409 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:29,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:29,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:29,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:29,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:29,117 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:29,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:29,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:29,126 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:29,127 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:29,127 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:29,226 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:29,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [276059088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:29,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:29,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:29,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047805864] [2021-06-05 15:10:29,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:29,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:29,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:29,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:29,227 INFO L87 Difference]: Start difference. First operand 3839 states and 16078 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:29,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:29,865 INFO L93 Difference]: Finished difference Result 4125 states and 17157 transitions. [2021-06-05 15:10:29,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:29,865 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:29,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:29,872 INFO L225 Difference]: With dead ends: 4125 [2021-06-05 15:10:29,872 INFO L226 Difference]: Without dead ends: 4104 [2021-06-05 15:10:29,872 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 568.4ms TimeCoverageRelationStatistics Valid=150, Invalid=662, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:29,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4104 states. [2021-06-05 15:10:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4104 to 3835. [2021-06-05 15:10:29,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:29,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 15:10:29,941 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 15:10:29,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:29,941 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 15:10:29,941 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:29,941 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 15:10:29,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:29,946 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:29,946 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:30,146 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 409 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable896 [2021-06-05 15:10:30,146 INFO L430 AbstractCegarLoop]: === Iteration 410 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:30,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:30,147 INFO L82 PathProgramCache]: Analyzing trace with hash -2063021903, now seen corresponding path program 255 times [2021-06-05 15:10:30,147 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:30,147 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986449307] [2021-06-05 15:10:30,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:30,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:30,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:30,243 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:30,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986449307] [2021-06-05 15:10:30,243 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986449307] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:30,243 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892320409] [2021-06-05 15:10:30,243 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 410 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:30,266 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:30,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:30,267 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:30,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:30,331 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:30,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:30,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:30,341 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:30,341 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:30,341 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:30,441 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:30,441 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [892320409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:30,441 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:30,441 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:30,441 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2145289466] [2021-06-05 15:10:30,441 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:30,441 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:30,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:30,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:30,441 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:31,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:31,018 INFO L93 Difference]: Finished difference Result 4138 states and 17212 transitions. [2021-06-05 15:10:31,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:31,018 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:31,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:31,026 INFO L225 Difference]: With dead ends: 4138 [2021-06-05 15:10:31,026 INFO L226 Difference]: Without dead ends: 4113 [2021-06-05 15:10:31,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 530.0ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:31,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4113 states. [2021-06-05 15:10:31,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4113 to 3835. [2021-06-05 15:10:31,069 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.189358372456964) internal successors, (16062), 3834 states have internal predecessors, (16062), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:31,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16062 transitions. [2021-06-05 15:10:31,077 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16062 transitions. Word has length 23 [2021-06-05 15:10:31,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:31,077 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16062 transitions. [2021-06-05 15:10:31,077 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:31,078 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16062 transitions. [2021-06-05 15:10:31,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:31,082 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:31,083 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:31,283 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 410 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable898 [2021-06-05 15:10:31,283 INFO L430 AbstractCegarLoop]: === Iteration 411 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:31,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:31,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1219252861, now seen corresponding path program 256 times [2021-06-05 15:10:31,283 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:31,283 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459965895] [2021-06-05 15:10:31,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:31,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:31,378 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:31,379 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:31,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459965895] [2021-06-05 15:10:31,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1459965895] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:31,379 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956454239] [2021-06-05 15:10:31,379 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 411 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:31,403 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:31,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:31,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:31,467 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:31,467 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:31,468 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:31,477 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:31,477 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:31,478 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:31,576 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1956454239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:31,576 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:31,576 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:31,576 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670863986] [2021-06-05 15:10:31,576 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:31,576 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:31,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:31,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:31,577 INFO L87 Difference]: Start difference. First operand 3835 states and 16062 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:32,242 INFO L93 Difference]: Finished difference Result 4140 states and 17217 transitions. [2021-06-05 15:10:32,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:32,242 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:32,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:32,250 INFO L225 Difference]: With dead ends: 4140 [2021-06-05 15:10:32,250 INFO L226 Difference]: Without dead ends: 4119 [2021-06-05 15:10:32,250 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 598.4ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:32,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4119 states. [2021-06-05 15:10:32,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4119 to 3833. [2021-06-05 15:10:32,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3833 states, 3832 states have (on average 4.189457202505219) internal successors, (16054), 3832 states have internal predecessors, (16054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3833 states to 3833 states and 16054 transitions. [2021-06-05 15:10:32,301 INFO L78 Accepts]: Start accepts. Automaton has 3833 states and 16054 transitions. Word has length 23 [2021-06-05 15:10:32,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:32,301 INFO L482 AbstractCegarLoop]: Abstraction has 3833 states and 16054 transitions. [2021-06-05 15:10:32,301 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:32,301 INFO L276 IsEmpty]: Start isEmpty. Operand 3833 states and 16054 transitions. [2021-06-05 15:10:32,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:32,306 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:32,306 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:32,506 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable900,411 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:32,506 INFO L430 AbstractCegarLoop]: === Iteration 412 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:32,506 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:32,507 INFO L82 PathProgramCache]: Analyzing trace with hash -498233309, now seen corresponding path program 257 times [2021-06-05 15:10:32,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:32,507 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1307186430] [2021-06-05 15:10:32,507 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:32,617 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:32,617 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1307186430] [2021-06-05 15:10:32,617 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1307186430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:32,617 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1706654230] [2021-06-05 15:10:32,617 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 412 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:32,641 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:10:32,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:32,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:10:32,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:32,750 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:32,750 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 33 treesize of output 49 [2021-06-05 15:10:32,751 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:32,760 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:32,762 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 2 xjuncts. [2021-06-05 15:10:32,762 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:33, output treesize:10 [2021-06-05 15:10:32,787 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:32,787 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1706654230] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:32,787 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:32,787 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:10:32,787 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96286719] [2021-06-05 15:10:32,787 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:10:32,787 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:32,788 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:10:32,788 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:10:32,788 INFO L87 Difference]: Start difference. First operand 3833 states and 16054 transitions. Second operand has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:33,333 INFO L93 Difference]: Finished difference Result 4292 states and 17808 transitions. [2021-06-05 15:10:33,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:10:33,334 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:33,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:33,342 INFO L225 Difference]: With dead ends: 4292 [2021-06-05 15:10:33,342 INFO L226 Difference]: Without dead ends: 4261 [2021-06-05 15:10:33,342 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=116, Invalid=640, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:10:33,346 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4261 states. [2021-06-05 15:10:33,383 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4261 to 3835. [2021-06-05 15:10:33,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.188836724047992) internal successors, (16060), 3834 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16060 transitions. [2021-06-05 15:10:33,395 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16060 transitions. Word has length 23 [2021-06-05 15:10:33,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:33,395 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16060 transitions. [2021-06-05 15:10:33,395 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0) internal successors, (36), 17 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:33,395 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16060 transitions. [2021-06-05 15:10:33,400 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:33,401 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:33,401 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:33,601 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 412 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable902 [2021-06-05 15:10:33,601 INFO L430 AbstractCegarLoop]: === Iteration 413 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:33,601 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:33,601 INFO L82 PathProgramCache]: Analyzing trace with hash 542002489, now seen corresponding path program 258 times [2021-06-05 15:10:33,601 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:33,601 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316277809] [2021-06-05 15:10:33,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:33,603 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:33,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:33,691 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316277809] [2021-06-05 15:10:33,691 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316277809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,691 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058403916] [2021-06-05 15:10:33,691 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 413 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:33,715 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:10:33,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:33,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:33,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:33,813 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:10:33,813 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:10:33,814 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:33,825 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:33,825 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:33,825 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 15:10:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:33,907 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1058403916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:33,907 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:33,907 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:33,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954443587] [2021-06-05 15:10:33,908 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:33,908 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:33,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:33,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:33,908 INFO L87 Difference]: Start difference. First operand 3835 states and 16060 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:34,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:34,498 INFO L93 Difference]: Finished difference Result 4178 states and 17378 transitions. [2021-06-05 15:10:34,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:10:34,498 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:34,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:34,505 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 15:10:34,505 INFO L226 Difference]: Without dead ends: 4153 [2021-06-05 15:10:34,506 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 164 ImplicationChecksByTransitivity, 402.0ms TimeCoverageRelationStatistics Valid=126, Invalid=804, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:10:34,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4153 states. [2021-06-05 15:10:34,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4153 to 3835. [2021-06-05 15:10:34,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3835 states, 3834 states have (on average 4.188836724047992) internal successors, (16060), 3834 states have internal predecessors, (16060), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:34,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3835 states to 3835 states and 16060 transitions. [2021-06-05 15:10:34,559 INFO L78 Accepts]: Start accepts. Automaton has 3835 states and 16060 transitions. Word has length 23 [2021-06-05 15:10:34,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:34,559 INFO L482 AbstractCegarLoop]: Abstraction has 3835 states and 16060 transitions. [2021-06-05 15:10:34,559 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:34,559 INFO L276 IsEmpty]: Start isEmpty. Operand 3835 states and 16060 transitions. [2021-06-05 15:10:34,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:34,564 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:34,564 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:34,764 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable905,413 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:34,764 INFO L430 AbstractCegarLoop]: === Iteration 414 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:34,765 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:34,765 INFO L82 PathProgramCache]: Analyzing trace with hash -470690043, now seen corresponding path program 259 times [2021-06-05 15:10:34,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:34,765 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [504836121] [2021-06-05 15:10:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:34,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:34,855 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:34,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [504836121] [2021-06-05 15:10:34,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [504836121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:34,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705390067] [2021-06-05 15:10:34,855 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 414 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:34,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:34,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:34,879 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:34,952 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:34,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:34,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:34,961 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:34,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:34,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:35,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:35,041 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705390067] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:35,041 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:35,041 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:35,041 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395607375] [2021-06-05 15:10:35,042 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:35,042 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:35,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:35,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:35,042 INFO L87 Difference]: Start difference. First operand 3835 states and 16060 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:35,775 INFO L93 Difference]: Finished difference Result 4279 states and 17769 transitions. [2021-06-05 15:10:35,775 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:10:35,775 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:35,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:35,783 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 15:10:35,783 INFO L226 Difference]: Without dead ends: 4258 [2021-06-05 15:10:35,783 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 618.4ms TimeCoverageRelationStatistics Valid=162, Invalid=768, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:10:35,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-06-05 15:10:35,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3831. [2021-06-05 15:10:35,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3831 states, 3830 states have (on average 4.188511749347258) internal successors, (16042), 3830 states have internal predecessors, (16042), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3831 states to 3831 states and 16042 transitions. [2021-06-05 15:10:35,837 INFO L78 Accepts]: Start accepts. Automaton has 3831 states and 16042 transitions. Word has length 23 [2021-06-05 15:10:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:35,837 INFO L482 AbstractCegarLoop]: Abstraction has 3831 states and 16042 transitions. [2021-06-05 15:10:35,837 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 3831 states and 16042 transitions. [2021-06-05 15:10:35,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:35,843 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:35,843 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:36,043 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 414 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable909 [2021-06-05 15:10:36,043 INFO L430 AbstractCegarLoop]: === Iteration 415 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:36,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:36,043 INFO L82 PathProgramCache]: Analyzing trace with hash 1217838641, now seen corresponding path program 260 times [2021-06-05 15:10:36,043 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:36,043 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49357611] [2021-06-05 15:10:36,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:36,122 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:36,123 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49357611] [2021-06-05 15:10:36,123 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49357611] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:36,123 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2078770842] [2021-06-05 15:10:36,123 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 415 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:36,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:36,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:36,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:36,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:36,254 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:36,254 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:36,260 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:36,260 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 15:10:36,261 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:36,268 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:36,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:36,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:26 [2021-06-05 15:10:36,316 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:36,316 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2078770842] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:36,316 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:36,316 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:36,316 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376352058] [2021-06-05 15:10:36,316 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:36,316 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:36,317 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:36,317 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:36,317 INFO L87 Difference]: Start difference. First operand 3831 states and 16042 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:36,906 INFO L93 Difference]: Finished difference Result 4353 states and 18026 transitions. [2021-06-05 15:10:36,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:10:36,906 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:36,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:36,915 INFO L225 Difference]: With dead ends: 4353 [2021-06-05 15:10:36,915 INFO L226 Difference]: Without dead ends: 4344 [2021-06-05 15:10:36,915 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 441.1ms TimeCoverageRelationStatistics Valid=124, Invalid=932, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:10:36,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4344 states. [2021-06-05 15:10:36,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4344 to 3852. [2021-06-05 15:10:36,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3852 states, 3851 states have (on average 4.192936899506622) internal successors, (16147), 3851 states have internal predecessors, (16147), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3852 states to 3852 states and 16147 transitions. [2021-06-05 15:10:36,970 INFO L78 Accepts]: Start accepts. Automaton has 3852 states and 16147 transitions. Word has length 23 [2021-06-05 15:10:36,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:36,970 INFO L482 AbstractCegarLoop]: Abstraction has 3852 states and 16147 transitions. [2021-06-05 15:10:36,970 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:36,970 INFO L276 IsEmpty]: Start isEmpty. Operand 3852 states and 16147 transitions. [2021-06-05 15:10:36,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:36,975 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:36,975 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:37,176 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable911,415 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:37,176 INFO L430 AbstractCegarLoop]: === Iteration 416 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:37,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:37,176 INFO L82 PathProgramCache]: Analyzing trace with hash -1331844619, now seen corresponding path program 261 times [2021-06-05 15:10:37,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:37,176 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705179409] [2021-06-05 15:10:37,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:37,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:37,257 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:37,257 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705179409] [2021-06-05 15:10:37,257 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705179409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:37,257 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209389873] [2021-06-05 15:10:37,257 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 416 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:37,281 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:37,281 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:37,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:10:37,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:37,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2021-06-05 15:10:37,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:37,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:37,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:37,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:15 [2021-06-05 15:10:37,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:37,436 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209389873] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:37,436 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:37,436 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:37,436 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [337026512] [2021-06-05 15:10:37,436 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:37,436 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:37,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:37,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=309, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:37,437 INFO L87 Difference]: Start difference. First operand 3852 states and 16147 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:38,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:38,298 INFO L93 Difference]: Finished difference Result 4503 states and 18585 transitions. [2021-06-05 15:10:38,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:10:38,298 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:38,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:38,306 INFO L225 Difference]: With dead ends: 4503 [2021-06-05 15:10:38,306 INFO L226 Difference]: Without dead ends: 4484 [2021-06-05 15:10:38,306 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 584.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1005, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:10:38,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4484 states. [2021-06-05 15:10:38,348 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4484 to 3918. [2021-06-05 15:10:38,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.198621393923921) internal successors, (16446), 3917 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:38,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16446 transitions. [2021-06-05 15:10:38,359 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16446 transitions. Word has length 23 [2021-06-05 15:10:38,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:38,359 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16446 transitions. [2021-06-05 15:10:38,359 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:38,359 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16446 transitions. [2021-06-05 15:10:38,364 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:38,364 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:38,364 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:38,568 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable912,416 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:38,568 INFO L430 AbstractCegarLoop]: === Iteration 417 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:38,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:38,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1921546609, now seen corresponding path program 262 times [2021-06-05 15:10:38,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:38,569 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595147802] [2021-06-05 15:10:38,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:38,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:38,651 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:38,652 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:38,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595147802] [2021-06-05 15:10:38,652 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595147802] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:38,652 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [653902587] [2021-06-05 15:10:38,652 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 417 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:38,675 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:38,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:38,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:38,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:38,772 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:38,772 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:38,774 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:38,782 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:38,783 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:38,783 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:10:38,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:38,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [653902587] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:38,872 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:38,872 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:38,872 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347464468] [2021-06-05 15:10:38,872 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:38,872 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:38,872 INFO L87 Difference]: Start difference. First operand 3918 states and 16446 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:39,601 INFO L93 Difference]: Finished difference Result 4278 states and 17787 transitions. [2021-06-05 15:10:39,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:10:39,601 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:39,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:39,609 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 15:10:39,609 INFO L226 Difference]: Without dead ends: 4269 [2021-06-05 15:10:39,609 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:10:39,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4269 states. [2021-06-05 15:10:39,649 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4269 to 3915. [2021-06-05 15:10:39,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 4.199029126213592) internal successors, (16435), 3914 states have internal predecessors, (16435), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16435 transitions. [2021-06-05 15:10:39,660 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16435 transitions. Word has length 23 [2021-06-05 15:10:39,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:39,660 INFO L482 AbstractCegarLoop]: Abstraction has 3915 states and 16435 transitions. [2021-06-05 15:10:39,660 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:39,660 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16435 transitions. [2021-06-05 15:10:39,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:39,665 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:39,665 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:39,866 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable913,417 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,866 INFO L430 AbstractCegarLoop]: === Iteration 418 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:39,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:39,866 INFO L82 PathProgramCache]: Analyzing trace with hash 1695665499, now seen corresponding path program 263 times [2021-06-05 15:10:39,866 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:39,866 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2137893287] [2021-06-05 15:10:39,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:39,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:39,958 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:39,958 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:39,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2137893287] [2021-06-05 15:10:39,958 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2137893287] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:39,958 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2084515040] [2021-06-05 15:10:39,958 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 418 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:39,982 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:39,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:39,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:39,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:40,068 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:40,069 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:40,070 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:40,078 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:40,079 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:40,079 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:10:40,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:40,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2084515040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:40,166 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:40,166 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:40,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [232835203] [2021-06-05 15:10:40,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:40,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:40,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:40,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:40,167 INFO L87 Difference]: Start difference. First operand 3915 states and 16435 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:40,791 INFO L93 Difference]: Finished difference Result 4117 states and 17178 transitions. [2021-06-05 15:10:40,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:10:40,792 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:40,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:40,798 INFO L225 Difference]: With dead ends: 4117 [2021-06-05 15:10:40,798 INFO L226 Difference]: Without dead ends: 4108 [2021-06-05 15:10:40,799 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 515.6ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:10:40,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4108 states. [2021-06-05 15:10:40,836 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4108 to 3922. [2021-06-05 15:10:40,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.199183881662841) internal successors, (16465), 3921 states have internal predecessors, (16465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16465 transitions. [2021-06-05 15:10:40,847 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16465 transitions. Word has length 23 [2021-06-05 15:10:40,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:40,848 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16465 transitions. [2021-06-05 15:10:40,848 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:40,848 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16465 transitions. [2021-06-05 15:10:40,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:40,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:40,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:41,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable915,418 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:41,053 INFO L430 AbstractCegarLoop]: === Iteration 419 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:41,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:41,053 INFO L82 PathProgramCache]: Analyzing trace with hash 654089431, now seen corresponding path program 264 times [2021-06-05 15:10:41,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:41,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319452104] [2021-06-05 15:10:41,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:41,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:41,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:41,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319452104] [2021-06-05 15:10:41,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [319452104] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:41,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1494167334] [2021-06-05 15:10:41,154 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 419 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:41,179 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:10:41,179 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:41,180 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:10:41,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:41,302 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:10:41,302 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:10:41,306 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:10:41,325 INFO L628 ElimStorePlain]: treesize reduction 70, result has 19.5 percent of original size [2021-06-05 15:10:41,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:41,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 15:10:41,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:41,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1494167334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:41,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:41,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:41,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112806063] [2021-06-05 15:10:41,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:41,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:41,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:41,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:41,385 INFO L87 Difference]: Start difference. First operand 3922 states and 16465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:41,999 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:41,999 INFO L93 Difference]: Finished difference Result 4150 states and 17299 transitions. [2021-06-05 15:10:41,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:10:42,000 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:42,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:42,007 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 15:10:42,007 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 15:10:42,007 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 420.8ms TimeCoverageRelationStatistics Valid=121, Invalid=749, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:10:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 15:10:42,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3922. [2021-06-05 15:10:42,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.199183881662841) internal successors, (16465), 3921 states have internal predecessors, (16465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16465 transitions. [2021-06-05 15:10:42,057 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16465 transitions. Word has length 23 [2021-06-05 15:10:42,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:42,057 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16465 transitions. [2021-06-05 15:10:42,057 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:42,057 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16465 transitions. [2021-06-05 15:10:42,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:42,063 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:42,063 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:42,263 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 419 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable917 [2021-06-05 15:10:42,263 INFO L430 AbstractCegarLoop]: === Iteration 420 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -231708849, now seen corresponding path program 265 times [2021-06-05 15:10:42,263 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:42,263 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942084475] [2021-06-05 15:10:42,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:42,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:42,356 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:42,357 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942084475] [2021-06-05 15:10:42,357 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942084475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:42,357 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585679553] [2021-06-05 15:10:42,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 420 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:42,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:42,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:42,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:42,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:42,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:42,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:42,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:42,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:42,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:42,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:42,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585679553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:42,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:42,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:10:42,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331159157] [2021-06-05 15:10:42,554 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:10:42,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:42,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:10:42,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:10:42,554 INFO L87 Difference]: Start difference. First operand 3922 states and 16465 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:43,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:43,169 INFO L93 Difference]: Finished difference Result 4298 states and 17873 transitions. [2021-06-05 15:10:43,169 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:10:43,170 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:43,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:43,177 INFO L225 Difference]: With dead ends: 4298 [2021-06-05 15:10:43,177 INFO L226 Difference]: Without dead ends: 4289 [2021-06-05 15:10:43,177 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 464.2ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:10:43,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4289 states. [2021-06-05 15:10:43,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4289 to 3917. [2021-06-05 15:10:43,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.1981613891726255) internal successors, (16440), 3916 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:43,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16440 transitions. [2021-06-05 15:10:43,248 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16440 transitions. Word has length 23 [2021-06-05 15:10:43,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:43,248 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16440 transitions. [2021-06-05 15:10:43,248 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:43,248 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16440 transitions. [2021-06-05 15:10:43,253 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:43,253 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:43,253 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:43,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 420 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable921 [2021-06-05 15:10:43,454 INFO L430 AbstractCegarLoop]: === Iteration 421 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:43,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:43,454 INFO L82 PathProgramCache]: Analyzing trace with hash 157060551, now seen corresponding path program 266 times [2021-06-05 15:10:43,454 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:43,454 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [5253302] [2021-06-05 15:10:43,454 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:43,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:43,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:43,535 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:43,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [5253302] [2021-06-05 15:10:43,535 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [5253302] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:43,535 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1020660732] [2021-06-05 15:10:43,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 421 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:43,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:43,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:43,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:43,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:43,675 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:43,675 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:10:43,676 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:43,682 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:43,683 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:43,683 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:24 [2021-06-05 15:10:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:43,730 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1020660732] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:43,730 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:43,730 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:43,730 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196535157] [2021-06-05 15:10:43,731 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:43,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:43,731 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:43,731 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:43,731 INFO L87 Difference]: Start difference. First operand 3917 states and 16440 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:44,431 INFO L93 Difference]: Finished difference Result 4484 states and 18607 transitions. [2021-06-05 15:10:44,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:10:44,432 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:44,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:44,439 INFO L225 Difference]: With dead ends: 4484 [2021-06-05 15:10:44,440 INFO L226 Difference]: Without dead ends: 4475 [2021-06-05 15:10:44,440 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 484.8ms TimeCoverageRelationStatistics Valid=137, Invalid=985, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:10:44,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4475 states. [2021-06-05 15:10:44,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4475 to 3917. [2021-06-05 15:10:44,485 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.1981613891726255) internal successors, (16440), 3916 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16440 transitions. [2021-06-05 15:10:44,493 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16440 transitions. Word has length 23 [2021-06-05 15:10:44,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:44,493 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16440 transitions. [2021-06-05 15:10:44,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:44,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16440 transitions. [2021-06-05 15:10:44,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:44,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:44,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:44,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 421 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable923 [2021-06-05 15:10:44,699 INFO L430 AbstractCegarLoop]: === Iteration 422 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:44,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:44,699 INFO L82 PathProgramCache]: Analyzing trace with hash 1902344587, now seen corresponding path program 267 times [2021-06-05 15:10:44,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:44,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1266688886] [2021-06-05 15:10:44,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:44,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:44,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:44,782 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:44,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1266688886] [2021-06-05 15:10:44,782 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1266688886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:44,782 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465821475] [2021-06-05 15:10:44,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 422 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:44,805 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:44,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:44,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:44,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:44,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:44,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:44,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:44,911 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:44,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:44,912 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:10:45,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:45,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465821475] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:45,002 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:45,002 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:45,002 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1102026999] [2021-06-05 15:10:45,002 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:45,002 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:45,002 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:45,002 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:45,002 INFO L87 Difference]: Start difference. First operand 3917 states and 16440 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:46,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:46,174 INFO L93 Difference]: Finished difference Result 4535 states and 18823 transitions. [2021-06-05 15:10:46,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:10:46,174 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:46,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:46,183 INFO L225 Difference]: With dead ends: 4535 [2021-06-05 15:10:46,183 INFO L226 Difference]: Without dead ends: 4526 [2021-06-05 15:10:46,183 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 414 ImplicationChecksByTransitivity, 802.7ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:10:46,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4526 states. [2021-06-05 15:10:46,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4526 to 3921. [2021-06-05 15:10:46,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 4.198724489795918) internal successors, (16459), 3920 states have internal predecessors, (16459), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:46,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 16459 transitions. [2021-06-05 15:10:46,239 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 16459 transitions. Word has length 23 [2021-06-05 15:10:46,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:46,239 INFO L482 AbstractCegarLoop]: Abstraction has 3921 states and 16459 transitions. [2021-06-05 15:10:46,239 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:46,239 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 16459 transitions. [2021-06-05 15:10:46,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:46,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:46,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:46,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable924,422 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:46,444 INFO L430 AbstractCegarLoop]: === Iteration 423 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:46,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:46,445 INFO L82 PathProgramCache]: Analyzing trace with hash 860768519, now seen corresponding path program 268 times [2021-06-05 15:10:46,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:46,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540025552] [2021-06-05 15:10:46,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:46,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:46,527 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:46,528 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540025552] [2021-06-05 15:10:46,528 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540025552] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:46,528 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773479615] [2021-06-05 15:10:46,528 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 423 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:46,551 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:46,551 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:46,552 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:46,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:46,651 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:46,651 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:46,652 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:46,660 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:46,661 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:46,661 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:10:46,748 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:46,748 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773479615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:46,748 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:46,748 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:46,748 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360169735] [2021-06-05 15:10:46,748 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:46,749 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:46,749 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:46,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:46,749 INFO L87 Difference]: Start difference. First operand 3921 states and 16459 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:48,144 INFO L93 Difference]: Finished difference Result 4683 states and 19421 transitions. [2021-06-05 15:10:48,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2021-06-05 15:10:48,144 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:48,144 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:48,153 INFO L225 Difference]: With dead ends: 4683 [2021-06-05 15:10:48,153 INFO L226 Difference]: Without dead ends: 4674 [2021-06-05 15:10:48,153 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 569 ImplicationChecksByTransitivity, 947.6ms TimeCoverageRelationStatistics Valid=267, Invalid=1989, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:10:48,157 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4674 states. [2021-06-05 15:10:48,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4674 to 3913. [2021-06-05 15:10:48,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3913 states, 3912 states have (on average 4.199130879345604) internal successors, (16427), 3912 states have internal predecessors, (16427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3913 states to 3913 states and 16427 transitions. [2021-06-05 15:10:48,207 INFO L78 Accepts]: Start accepts. Automaton has 3913 states and 16427 transitions. Word has length 23 [2021-06-05 15:10:48,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:48,207 INFO L482 AbstractCegarLoop]: Abstraction has 3913 states and 16427 transitions. [2021-06-05 15:10:48,207 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:48,207 INFO L276 IsEmpty]: Start isEmpty. Operand 3913 states and 16427 transitions. [2021-06-05 15:10:48,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:48,212 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:48,212 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:48,412 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable926,423 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:48,412 INFO L430 AbstractCegarLoop]: === Iteration 424 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:48,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:48,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1917113491, now seen corresponding path program 269 times [2021-06-05 15:10:48,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:48,413 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154874313] [2021-06-05 15:10:48,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:48,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:48,496 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:48,496 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154874313] [2021-06-05 15:10:48,496 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154874313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:48,496 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130128440] [2021-06-05 15:10:48,496 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 424 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:48,520 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:10:48,520 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:48,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:48,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:48,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:48,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:10:48,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:48,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:48,636 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:48,636 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:10:48,724 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:48,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130128440] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:48,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:48,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:48,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996991249] [2021-06-05 15:10:48,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:48,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:48,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:48,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:48,725 INFO L87 Difference]: Start difference. First operand 3913 states and 16427 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:49,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:49,546 INFO L93 Difference]: Finished difference Result 5268 states and 21685 transitions. [2021-06-05 15:10:49,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:10:49,546 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:49,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:49,556 INFO L225 Difference]: With dead ends: 5268 [2021-06-05 15:10:49,556 INFO L226 Difference]: Without dead ends: 5229 [2021-06-05 15:10:49,556 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 281 ImplicationChecksByTransitivity, 534.3ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:10:49,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5229 states. [2021-06-05 15:10:49,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5229 to 3916. [2021-06-05 15:10:49,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:49,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 15:10:49,615 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 15:10:49,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:49,616 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 15:10:49,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:49,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 15:10:49,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:49,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:49,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:49,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable928,424 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:49,821 INFO L430 AbstractCegarLoop]: === Iteration 425 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:49,821 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:49,821 INFO L82 PathProgramCache]: Analyzing trace with hash 1112714267, now seen corresponding path program 270 times [2021-06-05 15:10:49,821 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:49,821 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492831701] [2021-06-05 15:10:49,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:49,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:49,901 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:49,901 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492831701] [2021-06-05 15:10:49,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492831701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:49,901 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874709148] [2021-06-05 15:10:49,901 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 425 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:49,925 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:10:49,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:49,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:49,926 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:50,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:50,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:10:50,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:50,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:50,026 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:50,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 15:10:50,086 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:50,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [874709148] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:50,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:50,087 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:50,087 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1501609962] [2021-06-05 15:10:50,087 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:50,087 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:50,087 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:50,087 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:50,087 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:51,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:51,257 INFO L93 Difference]: Finished difference Result 4810 states and 19848 transitions. [2021-06-05 15:10:51,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:10:51,257 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:51,257 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:51,265 INFO L225 Difference]: With dead ends: 4810 [2021-06-05 15:10:51,265 INFO L226 Difference]: Without dead ends: 4792 [2021-06-05 15:10:51,266 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 509 ImplicationChecksByTransitivity, 915.6ms TimeCoverageRelationStatistics Valid=298, Invalid=1682, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:10:51,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4792 states. [2021-06-05 15:10:51,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4792 to 3918. [2021-06-05 15:10:51,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196068419708961) internal successors, (16436), 3917 states have internal predecessors, (16436), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:51,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16436 transitions. [2021-06-05 15:10:51,340 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16436 transitions. Word has length 23 [2021-06-05 15:10:51,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:51,340 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16436 transitions. [2021-06-05 15:10:51,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:51,340 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16436 transitions. [2021-06-05 15:10:51,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:51,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:51,345 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:51,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 425 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable930 [2021-06-05 15:10:51,546 INFO L430 AbstractCegarLoop]: === Iteration 426 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:51,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:51,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1568686295, now seen corresponding path program 271 times [2021-06-05 15:10:51,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:51,546 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805984670] [2021-06-05 15:10:51,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:51,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:51,625 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:51,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:51,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805984670] [2021-06-05 15:10:51,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [805984670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:51,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383268463] [2021-06-05 15:10:51,626 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 426 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:51,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:51,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:51,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:51,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:51,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:51,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:51,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:51,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:51,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:10:51,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:51,835 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383268463] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:51,835 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:51,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:51,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450701176] [2021-06-05 15:10:51,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:51,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:51,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:51,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:51,836 INFO L87 Difference]: Start difference. First operand 3918 states and 16436 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,848 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:52,848 INFO L93 Difference]: Finished difference Result 4974 states and 20505 transitions. [2021-06-05 15:10:52,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:10:52,849 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:52,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:52,857 INFO L225 Difference]: With dead ends: 4974 [2021-06-05 15:10:52,857 INFO L226 Difference]: Without dead ends: 4942 [2021-06-05 15:10:52,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 350 ImplicationChecksByTransitivity, 774.1ms TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:10:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4942 states. [2021-06-05 15:10:52,900 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4942 to 3916. [2021-06-05 15:10:52,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 15:10:52,913 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 15:10:52,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:52,913 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 15:10:52,913 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:52,913 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 15:10:52,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:52,919 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:52,919 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:53,119 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable931,426 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:53,119 INFO L430 AbstractCegarLoop]: === Iteration 427 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:53,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:53,119 INFO L82 PathProgramCache]: Analyzing trace with hash -1477541221, now seen corresponding path program 272 times [2021-06-05 15:10:53,119 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:53,120 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1898090655] [2021-06-05 15:10:53,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:53,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:53,211 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:53,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:53,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1898090655] [2021-06-05 15:10:53,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1898090655] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:53,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445186464] [2021-06-05 15:10:53,212 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 427 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:53,235 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:10:53,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:53,236 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:10:53,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:53,311 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:10:53,311 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:10:53,316 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:53,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:10:53,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:53,325 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:53,326 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:53,326 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 15:10:53,416 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:53,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445186464] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:53,416 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:53,416 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:53,416 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [435269123] [2021-06-05 15:10:53,416 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:53,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:53,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:53,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=331, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:53,417 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,715 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:54,715 INFO L93 Difference]: Finished difference Result 4356 states and 18122 transitions. [2021-06-05 15:10:54,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:10:54,715 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:54,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:54,723 INFO L225 Difference]: With dead ends: 4356 [2021-06-05 15:10:54,724 INFO L226 Difference]: Without dead ends: 4347 [2021-06-05 15:10:54,724 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 409 ImplicationChecksByTransitivity, 867.2ms TimeCoverageRelationStatistics Valid=212, Invalid=1594, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:10:54,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4347 states. [2021-06-05 15:10:54,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4347 to 3922. [2021-06-05 15:10:54,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.197143585819944) internal successors, (16457), 3921 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16457 transitions. [2021-06-05 15:10:54,779 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16457 transitions. Word has length 23 [2021-06-05 15:10:54,779 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:54,779 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16457 transitions. [2021-06-05 15:10:54,779 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:54,779 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16457 transitions. [2021-06-05 15:10:54,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:54,784 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:54,784 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:54,984 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable933,427 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:54,984 INFO L430 AbstractCegarLoop]: === Iteration 428 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:54,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:54,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1775850007, now seen corresponding path program 273 times [2021-06-05 15:10:54,985 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:54,985 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [916124615] [2021-06-05 15:10:54,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:55,066 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:55,066 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:55,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [916124615] [2021-06-05 15:10:55,066 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [916124615] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:55,066 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [455755598] [2021-06-05 15:10:55,066 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 428 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:55,089 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:10:55,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:55,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:55,090 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:55,172 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:55,172 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:10:55,174 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:55,183 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:55,183 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:55,184 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 15:10:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:55,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [455755598] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:55,295 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:55,295 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:55,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [778534301] [2021-06-05 15:10:55,295 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:55,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:55,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:55,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:55,295 INFO L87 Difference]: Start difference. First operand 3922 states and 16457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:56,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:56,743 INFO L93 Difference]: Finished difference Result 4453 states and 18505 transitions. [2021-06-05 15:10:56,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:10:56,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:56,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:56,751 INFO L225 Difference]: With dead ends: 4453 [2021-06-05 15:10:56,751 INFO L226 Difference]: Without dead ends: 4444 [2021-06-05 15:10:56,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 559 ImplicationChecksByTransitivity, 1076.6ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:10:56,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4444 states. [2021-06-05 15:10:56,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4444 to 3918. [2021-06-05 15:10:56,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:56,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 15:10:56,803 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 15:10:56,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:56,803 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 15:10:56,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:56,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 15:10:56,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:56,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:56,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:57,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable934,428 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:57,008 INFO L430 AbstractCegarLoop]: === Iteration 429 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:57,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:57,008 INFO L82 PathProgramCache]: Analyzing trace with hash 1488728655, now seen corresponding path program 274 times [2021-06-05 15:10:57,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:57,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901860829] [2021-06-05 15:10:57,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:57,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:57,090 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:57,090 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:57,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901860829] [2021-06-05 15:10:57,090 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901860829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:57,090 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [223086604] [2021-06-05 15:10:57,090 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 429 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:57,113 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:10:57,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:57,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:57,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:57,196 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:57,196 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:57,197 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:57,206 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:57,207 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:57,207 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:57,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:57,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [223086604] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:57,314 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:57,314 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:57,314 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522607545] [2021-06-05 15:10:57,314 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:57,314 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:57,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:57,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:57,314 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:10:58,539 INFO L93 Difference]: Finished difference Result 4378 states and 18204 transitions. [2021-06-05 15:10:58,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:10:58,540 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:10:58,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:10:58,547 INFO L225 Difference]: With dead ends: 4378 [2021-06-05 15:10:58,547 INFO L226 Difference]: Without dead ends: 4369 [2021-06-05 15:10:58,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 422 ImplicationChecksByTransitivity, 971.1ms TimeCoverageRelationStatistics Valid=246, Invalid=1646, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:10:58,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4369 states. [2021-06-05 15:10:58,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4369 to 3922. [2021-06-05 15:10:58,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196378474878857) internal successors, (16454), 3921 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16454 transitions. [2021-06-05 15:10:58,599 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16454 transitions. Word has length 23 [2021-06-05 15:10:58,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:10:58,600 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16454 transitions. [2021-06-05 15:10:58,600 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:10:58,600 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16454 transitions. [2021-06-05 15:10:58,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:10:58,605 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:10:58,605 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:10:58,805 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 429 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable936 [2021-06-05 15:10:58,805 INFO L430 AbstractCegarLoop]: === Iteration 430 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:10:58,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:10:58,805 INFO L82 PathProgramCache]: Analyzing trace with hash 995511269, now seen corresponding path program 275 times [2021-06-05 15:10:58,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:10:58,806 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8536659] [2021-06-05 15:10:58,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:10:58,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:10:58,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:58,888 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:10:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8536659] [2021-06-05 15:10:58,888 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [8536659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:58,888 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255799531] [2021-06-05 15:10:58,888 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 430 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:10:58,913 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:10:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:10:58,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:10:58,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:10:59,009 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:59,009 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:10:59,010 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:10:59,019 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:10:59,020 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:10:59,020 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:10:59,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:10:59,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255799531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:10:59,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:10:59,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:10:59,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030407330] [2021-06-05 15:10:59,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:10:59,126 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:10:59,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:10:59,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:10:59,126 INFO L87 Difference]: Start difference. First operand 3922 states and 16454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:00,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:00,360 INFO L93 Difference]: Finished difference Result 4367 states and 18169 transitions. [2021-06-05 15:11:00,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:11:00,360 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:00,360 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:00,367 INFO L225 Difference]: With dead ends: 4367 [2021-06-05 15:11:00,367 INFO L226 Difference]: Without dead ends: 4356 [2021-06-05 15:11:00,367 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 944.9ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:11:00,371 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-05 15:11:00,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3922. [2021-06-05 15:11:00,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196378474878857) internal successors, (16454), 3921 states have internal predecessors, (16454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:00,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16454 transitions. [2021-06-05 15:11:00,418 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16454 transitions. Word has length 23 [2021-06-05 15:11:00,418 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:00,418 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16454 transitions. [2021-06-05 15:11:00,419 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:00,419 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16454 transitions. [2021-06-05 15:11:00,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:00,424 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:00,424 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:00,624 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable938,430 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:00,624 INFO L430 AbstractCegarLoop]: === Iteration 431 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:00,624 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:00,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1930287525, now seen corresponding path program 276 times [2021-06-05 15:11:00,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:00,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605453366] [2021-06-05 15:11:00,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:00,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:00,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:00,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:00,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605453366] [2021-06-05 15:11:00,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605453366] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:00,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043662493] [2021-06-05 15:11:00,706 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 431 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:00,730 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:00,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:00,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:00,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:00,820 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:11:00,820 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:11:00,822 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:00,833 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:00,834 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:00,834 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 15:11:00,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:00,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043662493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:00,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:00,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:00,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954959473] [2021-06-05 15:11:00,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:00,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:00,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:00,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:00,937 INFO L87 Difference]: Start difference. First operand 3922 states and 16454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:01,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:01,840 INFO L93 Difference]: Finished difference Result 4454 states and 18497 transitions. [2021-06-05 15:11:01,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:11:01,840 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:01,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:01,847 INFO L225 Difference]: With dead ends: 4454 [2021-06-05 15:11:01,848 INFO L226 Difference]: Without dead ends: 4420 [2021-06-05 15:11:01,848 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 667.8ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:11:01,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4420 states. [2021-06-05 15:11:01,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4420 to 3928. [2021-06-05 15:11:01,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196078431372549) internal successors, (16478), 3927 states have internal predecessors, (16478), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16478 transitions. [2021-06-05 15:11:01,922 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16478 transitions. Word has length 23 [2021-06-05 15:11:01,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:01,922 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16478 transitions. [2021-06-05 15:11:01,922 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:01,923 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16478 transitions. [2021-06-05 15:11:01,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:01,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:01,928 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:02,128 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 431 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable940 [2021-06-05 15:11:02,128 INFO L430 AbstractCegarLoop]: === Iteration 432 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:02,128 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:02,128 INFO L82 PathProgramCache]: Analyzing trace with hash 917594993, now seen corresponding path program 277 times [2021-06-05 15:11:02,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:02,128 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210384963] [2021-06-05 15:11:02,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:02,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:02,209 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:02,209 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210384963] [2021-06-05 15:11:02,209 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210384963] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:02,209 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018403276] [2021-06-05 15:11:02,209 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 432 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:02,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:02,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:02,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:02,317 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:02,317 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:11:02,318 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:02,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:02,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:02,329 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:11:02,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:02,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018403276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:02,442 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:02,442 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:02,442 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1015898109] [2021-06-05 15:11:02,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:02,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:02,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:02,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:02,443 INFO L87 Difference]: Start difference. First operand 3928 states and 16478 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:03,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:03,741 INFO L93 Difference]: Finished difference Result 4446 states and 18479 transitions. [2021-06-05 15:11:03,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:11:03,742 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:03,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:03,749 INFO L225 Difference]: With dead ends: 4446 [2021-06-05 15:11:03,749 INFO L226 Difference]: Without dead ends: 4435 [2021-06-05 15:11:03,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 959.4ms TimeCoverageRelationStatistics Valid=255, Invalid=1815, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:11:03,754 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4435 states. [2021-06-05 15:11:03,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4435 to 3924. [2021-06-05 15:11:03,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:03,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 15:11:03,803 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 15:11:03,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:03,803 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 15:11:03,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:03,803 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 15:11:03,808 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:03,808 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:03,808 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:04,008 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable944,432 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:04,009 INFO L430 AbstractCegarLoop]: === Iteration 433 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:04,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:04,009 INFO L82 PathProgramCache]: Analyzing trace with hash -1579445, now seen corresponding path program 278 times [2021-06-05 15:11:04,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:04,009 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612064921] [2021-06-05 15:11:04,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:04,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:04,103 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:04,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612064921] [2021-06-05 15:11:04,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612064921] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:04,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906663959] [2021-06-05 15:11:04,103 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 433 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:04,126 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:04,126 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:04,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:11:04,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:04,209 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:04,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 20 treesize of output 28 [2021-06-05 15:11:04,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:04,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:04,217 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:04,217 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:27 [2021-06-05 15:11:04,283 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:04,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [906663959] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:04,283 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:04,283 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:04,283 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820642439] [2021-06-05 15:11:04,283 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:04,283 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:04,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:04,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:04,283 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:04,836 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:04,836 INFO L93 Difference]: Finished difference Result 4229 states and 17621 transitions. [2021-06-05 15:11:04,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:11:04,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:04,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:04,843 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 15:11:04,843 INFO L226 Difference]: Without dead ends: 4220 [2021-06-05 15:11:04,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 412.6ms TimeCoverageRelationStatistics Valid=110, Invalid=592, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:11:04,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-06-05 15:11:04,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3928. [2021-06-05 15:11:04,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196842373312961) internal successors, (16481), 3927 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:04,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16481 transitions. [2021-06-05 15:11:04,894 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16481 transitions. Word has length 23 [2021-06-05 15:11:04,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:04,894 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16481 transitions. [2021-06-05 15:11:04,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:04,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16481 transitions. [2021-06-05 15:11:04,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:04,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:04,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:05,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable946,433 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:05,100 INFO L430 AbstractCegarLoop]: === Iteration 434 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:05,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:05,100 INFO L82 PathProgramCache]: Analyzing trace with hash -1043155513, now seen corresponding path program 279 times [2021-06-05 15:11:05,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:05,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737887455] [2021-06-05 15:11:05,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:05,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:05,193 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:05,193 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:05,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737887455] [2021-06-05 15:11:05,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737887455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:05,194 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573689277] [2021-06-05 15:11:05,194 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 434 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:05,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:05,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:05,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:05,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:05,298 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:05,299 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:05,300 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:05,308 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:05,309 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:05,309 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:11:05,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:05,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1573689277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:05,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:05,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:05,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43231222] [2021-06-05 15:11:05,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:05,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:05,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:05,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:05,393 INFO L87 Difference]: Start difference. First operand 3928 states and 16481 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:06,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:06,001 INFO L93 Difference]: Finished difference Result 4229 states and 17625 transitions. [2021-06-05 15:11:06,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:11:06,002 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:06,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:06,009 INFO L225 Difference]: With dead ends: 4229 [2021-06-05 15:11:06,009 INFO L226 Difference]: Without dead ends: 4220 [2021-06-05 15:11:06,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:06,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4220 states. [2021-06-05 15:11:06,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4220 to 3924. [2021-06-05 15:11:06,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:06,060 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 15:11:06,060 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 15:11:06,060 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:06,060 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 15:11:06,060 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:06,060 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 15:11:06,065 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:06,065 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:06,065 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:06,265 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable947,434 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:06,265 INFO L430 AbstractCegarLoop]: === Iteration 435 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:06,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:06,266 INFO L82 PathProgramCache]: Analyzing trace with hash -1928953793, now seen corresponding path program 280 times [2021-06-05 15:11:06,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:06,266 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438537457] [2021-06-05 15:11:06,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:06,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:06,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:06,361 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:06,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438537457] [2021-06-05 15:11:06,361 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438537457] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:06,361 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1675674052] [2021-06-05 15:11:06,361 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 435 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:06,384 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:06,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:06,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:06,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:06,480 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:06,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:06,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:06,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:06,489 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:06,489 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:06,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:06,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1675674052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:06,552 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:06,552 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:06,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830611528] [2021-06-05 15:11:06,552 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:06,552 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:06,552 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:06,552 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:06,552 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:07,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:07,234 INFO L93 Difference]: Finished difference Result 4391 states and 18255 transitions. [2021-06-05 15:11:07,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:11:07,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:07,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:07,242 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 15:11:07,242 INFO L226 Difference]: Without dead ends: 4382 [2021-06-05 15:11:07,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 507.5ms TimeCoverageRelationStatistics Valid=155, Invalid=837, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:11:07,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4382 states. [2021-06-05 15:11:07,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4382 to 3924. [2021-06-05 15:11:07,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:07,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 15:11:07,313 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 15:11:07,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:07,313 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 15:11:07,313 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:07,313 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 15:11:07,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:07,318 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:07,318 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:07,518 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable949,435 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:07,518 INFO L430 AbstractCegarLoop]: === Iteration 436 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:07,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:07,519 INFO L82 PathProgramCache]: Analyzing trace with hash -2114008075, now seen corresponding path program 281 times [2021-06-05 15:11:07,519 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:07,519 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [472381602] [2021-06-05 15:11:07,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:07,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:07,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:07,622 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [472381602] [2021-06-05 15:11:07,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [472381602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:07,622 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908959320] [2021-06-05 15:11:07,622 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 436 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:07,646 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:07,646 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:07,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:07,647 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:07,712 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:07,712 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:07,713 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:07,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:07,722 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:07,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:07,824 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:07,824 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [908959320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:07,824 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:07,824 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:07,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1178858908] [2021-06-05 15:11:07,824 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:07,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:07,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:07,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:07,825 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:08,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:08,491 INFO L93 Difference]: Finished difference Result 4220 states and 17589 transitions. [2021-06-05 15:11:08,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:11:08,491 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:08,491 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:08,498 INFO L225 Difference]: With dead ends: 4220 [2021-06-05 15:11:08,498 INFO L226 Difference]: Without dead ends: 4211 [2021-06-05 15:11:08,498 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 609.8ms TimeCoverageRelationStatistics Valid=164, Invalid=648, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:08,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4211 states. [2021-06-05 15:11:08,538 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4211 to 3928. [2021-06-05 15:11:08,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.196842373312961) internal successors, (16481), 3927 states have internal predecessors, (16481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:08,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16481 transitions. [2021-06-05 15:11:08,550 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16481 transitions. Word has length 23 [2021-06-05 15:11:08,550 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:08,550 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16481 transitions. [2021-06-05 15:11:08,550 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:08,550 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16481 transitions. [2021-06-05 15:11:08,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:08,555 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:08,555 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:08,756 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable951,436 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:08,756 INFO L430 AbstractCegarLoop]: === Iteration 437 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:08,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:08,756 INFO L82 PathProgramCache]: Analyzing trace with hash 1139383153, now seen corresponding path program 282 times [2021-06-05 15:11:08,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:08,756 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1799284500] [2021-06-05 15:11:08,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:08,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:08,859 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:08,860 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:08,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1799284500] [2021-06-05 15:11:08,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1799284500] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:08,860 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [96453110] [2021-06-05 15:11:08,860 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 437 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:08,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:08,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:08,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:08,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:08,955 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:08,975 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:11:08,975 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:11:08,976 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:08,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:08,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:08,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 15:11:09,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:09,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [96453110] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:09,087 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:09,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:09,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1722351789] [2021-06-05 15:11:09,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:09,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:09,088 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:09,088 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:09,088 INFO L87 Difference]: Start difference. First operand 3928 states and 16481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:09,577 INFO L93 Difference]: Finished difference Result 4108 states and 17143 transitions. [2021-06-05 15:11:09,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:11:09,577 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:09,577 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:09,584 INFO L225 Difference]: With dead ends: 4108 [2021-06-05 15:11:09,585 INFO L226 Difference]: Without dead ends: 4099 [2021-06-05 15:11:09,585 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 416.7ms TimeCoverageRelationStatistics Valid=103, Invalid=547, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:09,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4099 states. [2021-06-05 15:11:09,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4099 to 3924. [2021-06-05 15:11:09,629 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 15:11:09,638 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 15:11:09,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:09,638 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 15:11:09,638 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:09,638 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 15:11:09,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:09,643 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:09,643 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:09,843 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable953,437 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:09,844 INFO L430 AbstractCegarLoop]: === Iteration 438 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:09,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:09,844 INFO L82 PathProgramCache]: Analyzing trace with hash 852261801, now seen corresponding path program 283 times [2021-06-05 15:11:09,844 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:09,844 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411630403] [2021-06-05 15:11:09,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:09,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:09,971 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:09,971 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:09,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411630403] [2021-06-05 15:11:09,971 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411630403] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:09,971 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201848713] [2021-06-05 15:11:09,971 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 438 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:09,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:09,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:09,995 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:10,060 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:10,060 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:10,061 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:10,071 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:10,072 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:10,072 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:10,171 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:10,171 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1201848713] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:10,171 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:10,171 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:10,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123982042] [2021-06-05 15:11:10,171 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:10,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:10,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:10,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:10,172 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:10,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:10,851 INFO L93 Difference]: Finished difference Result 4206 states and 17536 transitions. [2021-06-05 15:11:10,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:11:10,851 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:10,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:10,858 INFO L225 Difference]: With dead ends: 4206 [2021-06-05 15:11:10,858 INFO L226 Difference]: Without dead ends: 4197 [2021-06-05 15:11:10,858 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 620.7ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:11:10,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4197 states. [2021-06-05 15:11:10,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4197 to 3917. [2021-06-05 15:11:10,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3917 states, 3916 states have (on average 4.202247191011236) internal successors, (16456), 3916 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:10,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3917 states to 3917 states and 16456 transitions. [2021-06-05 15:11:10,909 INFO L78 Accepts]: Start accepts. Automaton has 3917 states and 16456 transitions. Word has length 23 [2021-06-05 15:11:10,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:10,909 INFO L482 AbstractCegarLoop]: Abstraction has 3917 states and 16456 transitions. [2021-06-05 15:11:10,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:10,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3917 states and 16456 transitions. [2021-06-05 15:11:10,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:10,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:10,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:11,114 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 438 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable957 [2021-06-05 15:11:11,114 INFO L430 AbstractCegarLoop]: === Iteration 439 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:11,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:11,115 INFO L82 PathProgramCache]: Analyzing trace with hash 359044415, now seen corresponding path program 284 times [2021-06-05 15:11:11,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:11,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [810837272] [2021-06-05 15:11:11,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:11,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:11,217 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:11,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [810837272] [2021-06-05 15:11:11,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [810837272] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:11,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2119643142] [2021-06-05 15:11:11,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 439 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:11,240 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:11,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:11,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:11:11,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:11,300 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:11,301 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:11,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:11,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:11:11,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:11,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:11,315 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:11,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 15:11:11,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:11,397 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2119643142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:11,398 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:11,398 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:11,398 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642296815] [2021-06-05 15:11:11,398 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:11,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:11,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:11,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:11,398 INFO L87 Difference]: Start difference. First operand 3917 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:12,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:12,038 INFO L93 Difference]: Finished difference Result 4140 states and 17293 transitions. [2021-06-05 15:11:12,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:11:12,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:12,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:12,045 INFO L225 Difference]: With dead ends: 4140 [2021-06-05 15:11:12,046 INFO L226 Difference]: Without dead ends: 4129 [2021-06-05 15:11:12,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 452.4ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:11:12,049 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4129 states. [2021-06-05 15:11:12,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4129 to 3921. [2021-06-05 15:11:12,087 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3921 states, 3920 states have (on average 4.202551020408163) internal successors, (16474), 3920 states have internal predecessors, (16474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:12,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3921 states to 3921 states and 16474 transitions. [2021-06-05 15:11:12,095 INFO L78 Accepts]: Start accepts. Automaton has 3921 states and 16474 transitions. Word has length 23 [2021-06-05 15:11:12,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:12,095 INFO L482 AbstractCegarLoop]: Abstraction has 3921 states and 16474 transitions. [2021-06-05 15:11:12,095 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:12,095 INFO L276 IsEmpty]: Start isEmpty. Operand 3921 states and 16474 transitions. [2021-06-05 15:11:12,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:12,100 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:12,100 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:12,300 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable959,439 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:12,301 INFO L430 AbstractCegarLoop]: === Iteration 440 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:12,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:12,301 INFO L82 PathProgramCache]: Analyzing trace with hash 1293820671, now seen corresponding path program 285 times [2021-06-05 15:11:12,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:12,301 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1934329443] [2021-06-05 15:11:12,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:12,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:12,414 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:12,414 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:12,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1934329443] [2021-06-05 15:11:12,414 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1934329443] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:12,414 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854014115] [2021-06-05 15:11:12,414 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 440 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:12,438 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:12,438 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:12,439 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 37 conjunts are in the unsatisfiable core [2021-06-05 15:11:12,439 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:12,523 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:12,523 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:12,524 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 13 [2021-06-05 15:11:12,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:12,529 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:12,529 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:12,530 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:32, output treesize:16 [2021-06-05 15:11:12,588 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:12,588 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854014115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:12,588 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:12,588 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:12,588 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1593094623] [2021-06-05 15:11:12,588 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:12,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:12,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:12,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:12,589 INFO L87 Difference]: Start difference. First operand 3921 states and 16474 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:12,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:12,835 INFO L93 Difference]: Finished difference Result 4246 states and 17704 transitions. [2021-06-05 15:11:12,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-06-05 15:11:12,836 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:12,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:12,844 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 15:11:12,844 INFO L226 Difference]: Without dead ends: 4232 [2021-06-05 15:11:12,844 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 230.8ms TimeCoverageRelationStatistics Valid=88, Invalid=332, Unknown=0, NotChecked=0, Total=420 [2021-06-05 15:11:12,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4232 states. [2021-06-05 15:11:12,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4232 to 3945. [2021-06-05 15:11:12,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.205121703853956) internal successors, (16585), 3944 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:12,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16585 transitions. [2021-06-05 15:11:12,894 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16585 transitions. Word has length 23 [2021-06-05 15:11:12,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:12,894 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16585 transitions. [2021-06-05 15:11:12,894 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:12,894 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16585 transitions. [2021-06-05 15:11:12,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:12,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:12,899 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:13,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable960,440 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:13,100 INFO L430 AbstractCegarLoop]: === Iteration 441 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:13,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:13,100 INFO L82 PathProgramCache]: Analyzing trace with hash 281128139, now seen corresponding path program 286 times [2021-06-05 15:11:13,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:13,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171404270] [2021-06-05 15:11:13,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:13,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:13,212 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:13,212 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171404270] [2021-06-05 15:11:13,212 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171404270] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:13,212 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510749219] [2021-06-05 15:11:13,212 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 441 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:13,250 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:13,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:13,251 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:13,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:13,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:13,315 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:13,316 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:13,324 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:13,325 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:13,325 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:13,424 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:13,424 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510749219] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:13,424 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:13,424 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:13,424 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014494982] [2021-06-05 15:11:13,424 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:13,424 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:13,424 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:13,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:13,425 INFO L87 Difference]: Start difference. First operand 3945 states and 16585 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:14,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:14,392 INFO L93 Difference]: Finished difference Result 4182 states and 17468 transitions. [2021-06-05 15:11:14,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:14,392 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:14,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:14,399 INFO L225 Difference]: With dead ends: 4182 [2021-06-05 15:11:14,399 INFO L226 Difference]: Without dead ends: 4171 [2021-06-05 15:11:14,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 221 ImplicationChecksByTransitivity, 903.9ms TimeCoverageRelationStatistics Valid=233, Invalid=889, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:11:14,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4171 states. [2021-06-05 15:11:14,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4171 to 3926. [2021-06-05 15:11:14,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.202292993630573) internal successors, (16494), 3925 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:14,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16494 transitions. [2021-06-05 15:11:14,451 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16494 transitions. Word has length 23 [2021-06-05 15:11:14,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:14,451 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16494 transitions. [2021-06-05 15:11:14,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:14,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16494 transitions. [2021-06-05 15:11:14,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:14,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:14,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:14,656 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 441 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable961 [2021-06-05 15:11:14,657 INFO L430 AbstractCegarLoop]: === Iteration 442 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:14,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:14,657 INFO L82 PathProgramCache]: Analyzing trace with hash -1436358031, now seen corresponding path program 287 times [2021-06-05 15:11:14,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:14,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184555179] [2021-06-05 15:11:14,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:14,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:14,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:14,750 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184555179] [2021-06-05 15:11:14,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [184555179] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:14,750 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1541091395] [2021-06-05 15:11:14,750 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 442 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:14,774 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:14,774 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:14,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:14,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:14,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:14,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:14,866 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:14,873 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:14,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:14,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:14,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1541091395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:14,936 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:14,936 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:14,936 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916616326] [2021-06-05 15:11:14,936 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:14,936 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:14,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:14,937 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:14,937 INFO L87 Difference]: Start difference. First operand 3926 states and 16494 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:15,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:15,653 INFO L93 Difference]: Finished difference Result 4513 states and 18763 transitions. [2021-06-05 15:11:15,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:15,653 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:15,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:15,660 INFO L225 Difference]: With dead ends: 4513 [2021-06-05 15:11:15,661 INFO L226 Difference]: Without dead ends: 4504 [2021-06-05 15:11:15,661 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 536.2ms TimeCoverageRelationStatistics Valid=165, Invalid=891, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:11:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4504 states. [2021-06-05 15:11:15,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4504 to 3928. [2021-06-05 15:11:15,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3928 states, 3927 states have (on average 4.201680672268908) internal successors, (16500), 3927 states have internal predecessors, (16500), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3928 states to 3928 states and 16500 transitions. [2021-06-05 15:11:15,713 INFO L78 Accepts]: Start accepts. Automaton has 3928 states and 16500 transitions. Word has length 23 [2021-06-05 15:11:15,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:15,713 INFO L482 AbstractCegarLoop]: Abstraction has 3928 states and 16500 transitions. [2021-06-05 15:11:15,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:15,713 INFO L276 IsEmpty]: Start isEmpty. Operand 3928 states and 16500 transitions. [2021-06-05 15:11:15,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:15,718 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:15,718 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:15,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable963,442 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:15,919 INFO L430 AbstractCegarLoop]: === Iteration 443 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:15,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:15,919 INFO L82 PathProgramCache]: Analyzing trace with hash -396122233, now seen corresponding path program 288 times [2021-06-05 15:11:15,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:15,919 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543463399] [2021-06-05 15:11:15,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:15,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:16,021 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:16,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:16,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543463399] [2021-06-05 15:11:16,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543463399] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:16,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [900884829] [2021-06-05 15:11:16,022 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 443 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:16,045 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:16,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:16,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:16,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:16,148 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:11:16,148 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:11:16,149 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:16,160 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:16,160 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:16,160 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 15:11:16,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:16,244 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [900884829] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:16,244 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:16,244 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:16,244 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677908683] [2021-06-05 15:11:16,244 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:16,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:16,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:16,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:16,245 INFO L87 Difference]: Start difference. First operand 3928 states and 16500 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:16,763 INFO L93 Difference]: Finished difference Result 4164 states and 17397 transitions. [2021-06-05 15:11:16,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:11:16,763 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:16,770 INFO L225 Difference]: With dead ends: 4164 [2021-06-05 15:11:16,770 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 15:11:16,770 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 443.1ms TimeCoverageRelationStatistics Valid=120, Invalid=692, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:16,774 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 15:11:16,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3932. [2021-06-05 15:11:16,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 4.201475451539048) internal successors, (16516), 3931 states have internal predecessors, (16516), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 16516 transitions. [2021-06-05 15:11:16,827 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 16516 transitions. Word has length 23 [2021-06-05 15:11:16,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:16,827 INFO L482 AbstractCegarLoop]: Abstraction has 3932 states and 16516 transitions. [2021-06-05 15:11:16,827 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:16,827 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 16516 transitions. [2021-06-05 15:11:16,832 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:16,832 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:16,832 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:17,032 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 443 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable965 [2021-06-05 15:11:17,033 INFO L430 AbstractCegarLoop]: === Iteration 444 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:17,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:17,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1408814765, now seen corresponding path program 289 times [2021-06-05 15:11:17,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:17,033 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1189435173] [2021-06-05 15:11:17,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:17,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:17,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:17,137 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1189435173] [2021-06-05 15:11:17,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1189435173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:17,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [186227273] [2021-06-05 15:11:17,137 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 444 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:17,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:17,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:17,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:17,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:17,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:17,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:17,248 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:17,248 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:17,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:17,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:17,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [186227273] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:17,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:17,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:17,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688225667] [2021-06-05 15:11:17,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:17,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:17,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:17,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:17,331 INFO L87 Difference]: Start difference. First operand 3932 states and 16516 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:18,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:18,174 INFO L93 Difference]: Finished difference Result 4346 states and 18114 transitions. [2021-06-05 15:11:18,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:11:18,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:18,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:18,182 INFO L225 Difference]: With dead ends: 4346 [2021-06-05 15:11:18,182 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 15:11:18,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 735.6ms TimeCoverageRelationStatistics Valid=184, Invalid=808, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:11:18,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 15:11:18,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3924. [2021-06-05 15:11:18,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.201376497578384) internal successors, (16482), 3923 states have internal predecessors, (16482), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:18,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16482 transitions. [2021-06-05 15:11:18,235 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16482 transitions. Word has length 23 [2021-06-05 15:11:18,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:18,235 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16482 transitions. [2021-06-05 15:11:18,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:18,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16482 transitions. [2021-06-05 15:11:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:18,241 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:18,241 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:18,441 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable969,444 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:18,441 INFO L430 AbstractCegarLoop]: === Iteration 445 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:18,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:18,441 INFO L82 PathProgramCache]: Analyzing trace with hash -927467449, now seen corresponding path program 290 times [2021-06-05 15:11:18,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:18,442 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859615695] [2021-06-05 15:11:18,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:18,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:18,530 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:18,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:18,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859615695] [2021-06-05 15:11:18,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859615695] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:18,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [75695250] [2021-06-05 15:11:18,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 445 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:18,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:18,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:18,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:18,642 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:18,642 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:18,643 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:18,651 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:18,651 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:18,651 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:18,709 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:18,710 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [75695250] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:18,710 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:18,710 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:18,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455497331] [2021-06-05 15:11:18,710 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:18,710 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:18,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:18,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:18,710 INFO L87 Difference]: Start difference. First operand 3924 states and 16482 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:19,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:19,621 INFO L93 Difference]: Finished difference Result 4799 states and 19930 transitions. [2021-06-05 15:11:19,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:11:19,621 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:19,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:19,630 INFO L225 Difference]: With dead ends: 4799 [2021-06-05 15:11:19,630 INFO L226 Difference]: Without dead ends: 4777 [2021-06-05 15:11:19,630 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 611.8ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:11:19,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4777 states. [2021-06-05 15:11:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4777 to 3936. [2021-06-05 15:11:19,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3936 states, 3935 states have (on average 4.20279542566709) internal successors, (16538), 3935 states have internal predecessors, (16538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:19,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3936 states to 3936 states and 16538 transitions. [2021-06-05 15:11:19,685 INFO L78 Accepts]: Start accepts. Automaton has 3936 states and 16538 transitions. Word has length 23 [2021-06-05 15:11:19,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:19,686 INFO L482 AbstractCegarLoop]: Abstraction has 3936 states and 16538 transitions. [2021-06-05 15:11:19,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:19,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3936 states and 16538 transitions. [2021-06-05 15:11:19,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:19,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:19,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:19,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 445 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable971 [2021-06-05 15:11:19,891 INFO L430 AbstractCegarLoop]: === Iteration 446 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:19,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:19,891 INFO L82 PathProgramCache]: Analyzing trace with hash -342133497, now seen corresponding path program 291 times [2021-06-05 15:11:19,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:19,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029200099] [2021-06-05 15:11:19,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:19,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:19,983 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:19,983 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:19,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029200099] [2021-06-05 15:11:19,983 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029200099] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:19,983 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873166376] [2021-06-05 15:11:19,983 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 446 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:20,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:20,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:20,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:20,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:20,079 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:20,079 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:20,080 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:20,087 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:20,088 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:20,088 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:20,165 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:20,165 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873166376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:20,165 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:20,165 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:20,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451790370] [2021-06-05 15:11:20,165 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:20,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:20,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:20,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:20,166 INFO L87 Difference]: Start difference. First operand 3936 states and 16538 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:20,728 INFO L93 Difference]: Finished difference Result 4590 states and 19078 transitions. [2021-06-05 15:11:20,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:11:20,728 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:20,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:20,736 INFO L225 Difference]: With dead ends: 4590 [2021-06-05 15:11:20,736 INFO L226 Difference]: Without dead ends: 4564 [2021-06-05 15:11:20,736 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 519.8ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:20,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4564 states. [2021-06-05 15:11:20,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4564 to 3940. [2021-06-05 15:11:20,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.202589489718203) internal successors, (16554), 3939 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16554 transitions. [2021-06-05 15:11:20,790 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16554 transitions. Word has length 23 [2021-06-05 15:11:20,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:20,790 INFO L482 AbstractCegarLoop]: Abstraction has 3940 states and 16554 transitions. [2021-06-05 15:11:20,790 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:20,790 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16554 transitions. [2021-06-05 15:11:20,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:20,795 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:20,795 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:20,995 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable973,446 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:20,996 INFO L430 AbstractCegarLoop]: === Iteration 447 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:20,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:20,996 INFO L82 PathProgramCache]: Analyzing trace with hash 1271433237, now seen corresponding path program 292 times [2021-06-05 15:11:20,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:20,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2126089935] [2021-06-05 15:11:20,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:20,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:21,094 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:21,094 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:21,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2126089935] [2021-06-05 15:11:21,094 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2126089935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:21,094 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1450225097] [2021-06-05 15:11:21,094 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 447 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:21,117 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:21,117 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:21,118 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:21,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:21,208 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:21,209 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:21,210 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:21,217 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:21,218 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:21,218 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:21,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:21,293 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1450225097] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:21,293 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:21,293 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:21,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144043984] [2021-06-05 15:11:21,293 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:21,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:21,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:21,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:21,293 INFO L87 Difference]: Start difference. First operand 3940 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:22,056 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:22,057 INFO L93 Difference]: Finished difference Result 4617 states and 19188 transitions. [2021-06-05 15:11:22,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:11:22,057 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:22,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:22,065 INFO L225 Difference]: With dead ends: 4617 [2021-06-05 15:11:22,065 INFO L226 Difference]: Without dead ends: 4596 [2021-06-05 15:11:22,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 690.3ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:11:22,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4596 states. [2021-06-05 15:11:22,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4596 to 3932. [2021-06-05 15:11:22,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3932 states, 3931 states have (on average 4.202493004324599) internal successors, (16520), 3931 states have internal predecessors, (16520), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:22,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3932 states to 3932 states and 16520 transitions. [2021-06-05 15:11:22,118 INFO L78 Accepts]: Start accepts. Automaton has 3932 states and 16520 transitions. Word has length 23 [2021-06-05 15:11:22,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:22,118 INFO L482 AbstractCegarLoop]: Abstraction has 3932 states and 16520 transitions. [2021-06-05 15:11:22,118 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:22,118 INFO L276 IsEmpty]: Start isEmpty. Operand 3932 states and 16520 transitions. [2021-06-05 15:11:22,123 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:22,123 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:22,123 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:22,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 447 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable975 [2021-06-05 15:11:22,324 INFO L430 AbstractCegarLoop]: === Iteration 448 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:22,324 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:22,324 INFO L82 PathProgramCache]: Analyzing trace with hash -577970071, now seen corresponding path program 293 times [2021-06-05 15:11:22,324 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:22,324 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502237063] [2021-06-05 15:11:22,324 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:22,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:22,411 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502237063] [2021-06-05 15:11:22,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502237063] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:22,411 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037304493] [2021-06-05 15:11:22,411 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 448 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:22,435 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:22,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:22,435 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:22,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:22,519 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:22,519 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:22,520 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:22,528 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:22,528 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:22,529 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:22,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:22,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037304493] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:22,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:22,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:22,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863504294] [2021-06-05 15:11:22,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:22,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:22,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:22,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:22,592 INFO L87 Difference]: Start difference. First operand 3932 states and 16520 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:23,195 INFO L93 Difference]: Finished difference Result 4741 states and 19672 transitions. [2021-06-05 15:11:23,195 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:23,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:23,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:23,203 INFO L225 Difference]: With dead ends: 4741 [2021-06-05 15:11:23,204 INFO L226 Difference]: Without dead ends: 4706 [2021-06-05 15:11:23,204 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 444.3ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:11:23,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4706 states. [2021-06-05 15:11:23,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4706 to 3940. [2021-06-05 15:11:23,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3940 states, 3939 states have (on average 4.202589489718203) internal successors, (16554), 3939 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3940 states to 3940 states and 16554 transitions. [2021-06-05 15:11:23,257 INFO L78 Accepts]: Start accepts. Automaton has 3940 states and 16554 transitions. Word has length 23 [2021-06-05 15:11:23,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:23,257 INFO L482 AbstractCegarLoop]: Abstraction has 3940 states and 16554 transitions. [2021-06-05 15:11:23,257 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:23,257 INFO L276 IsEmpty]: Start isEmpty. Operand 3940 states and 16554 transitions. [2021-06-05 15:11:23,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:23,262 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:23,263 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:23,472 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable977,448 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:23,472 INFO L430 AbstractCegarLoop]: === Iteration 449 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:23,472 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:23,472 INFO L82 PathProgramCache]: Analyzing trace with hash -496571015, now seen corresponding path program 294 times [2021-06-05 15:11:23,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:23,472 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [651679539] [2021-06-05 15:11:23,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:23,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:23,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:23,564 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [651679539] [2021-06-05 15:11:23,564 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [651679539] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:23,564 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581077191] [2021-06-05 15:11:23,564 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 449 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:23,587 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:23,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:23,588 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:11:23,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:23,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:23,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:11:23,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:23,668 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:23,669 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:23,669 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 15:11:23,723 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:23,724 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581077191] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:23,724 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:23,724 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:23,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650788410] [2021-06-05 15:11:23,724 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:23,724 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:23,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:23,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:23,724 INFO L87 Difference]: Start difference. First operand 3940 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:24,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:24,261 INFO L93 Difference]: Finished difference Result 4430 states and 18449 transitions. [2021-06-05 15:11:24,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:11:24,262 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:24,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:24,269 INFO L225 Difference]: With dead ends: 4430 [2021-06-05 15:11:24,269 INFO L226 Difference]: Without dead ends: 4404 [2021-06-05 15:11:24,270 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 373.5ms TimeCoverageRelationStatistics Valid=143, Invalid=669, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:24,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4404 states. [2021-06-05 15:11:24,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4404 to 3944. [2021-06-05 15:11:24,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.202383971595232) internal successors, (16570), 3943 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:24,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16570 transitions. [2021-06-05 15:11:24,322 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16570 transitions. Word has length 23 [2021-06-05 15:11:24,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:24,322 INFO L482 AbstractCegarLoop]: Abstraction has 3944 states and 16570 transitions. [2021-06-05 15:11:24,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:24,322 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16570 transitions. [2021-06-05 15:11:24,327 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:24,327 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:24,327 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:24,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable979,449 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:24,528 INFO L430 AbstractCegarLoop]: === Iteration 450 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:24,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:24,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1116995719, now seen corresponding path program 295 times [2021-06-05 15:11:24,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:24,528 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160899616] [2021-06-05 15:11:24,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:24,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:24,621 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:24,621 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:24,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160899616] [2021-06-05 15:11:24,621 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160899616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:24,621 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1332981417] [2021-06-05 15:11:24,621 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 450 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:24,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:24,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:24,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:24,713 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:24,714 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:24,715 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:24,722 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:24,723 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:24,723 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:24,797 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:24,798 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1332981417] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:24,798 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:24,798 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:24,798 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718800168] [2021-06-05 15:11:24,798 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:24,798 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:24,798 INFO L87 Difference]: Start difference. First operand 3944 states and 16570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:25,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:25,622 INFO L93 Difference]: Finished difference Result 4566 states and 18992 transitions. [2021-06-05 15:11:25,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:11:25,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:25,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:25,631 INFO L225 Difference]: With dead ends: 4566 [2021-06-05 15:11:25,631 INFO L226 Difference]: Without dead ends: 4545 [2021-06-05 15:11:25,631 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 631.5ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:11:25,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4545 states. [2021-06-05 15:11:25,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4545 to 3938. [2021-06-05 15:11:25,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 4.203200406400812) internal successors, (16548), 3937 states have internal predecessors, (16548), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:25,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16548 transitions. [2021-06-05 15:11:25,686 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16548 transitions. Word has length 23 [2021-06-05 15:11:25,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:25,686 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 16548 transitions. [2021-06-05 15:11:25,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:25,686 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16548 transitions. [2021-06-05 15:11:25,691 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:25,691 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:25,691 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:25,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable980,450 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:25,892 INFO L430 AbstractCegarLoop]: === Iteration 451 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:25,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:25,892 INFO L82 PathProgramCache]: Analyzing trace with hash 1253245707, now seen corresponding path program 296 times [2021-06-05 15:11:25,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:25,892 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17565401] [2021-06-05 15:11:25,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:25,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:25,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:25,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17565401] [2021-06-05 15:11:25,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [17565401] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:25,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849662957] [2021-06-05 15:11:25,979 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 451 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:26,001 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:26,001 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:26,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:26,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:26,094 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:26,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:26,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:26,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:26,162 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1849662957] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:26,162 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:26,162 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:26,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332558493] [2021-06-05 15:11:26,162 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:26,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:26,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:26,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:26,163 INFO L87 Difference]: Start difference. First operand 3938 states and 16548 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:26,792 INFO L93 Difference]: Finished difference Result 4424 states and 18447 transitions. [2021-06-05 15:11:26,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:26,793 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:26,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:26,800 INFO L225 Difference]: With dead ends: 4424 [2021-06-05 15:11:26,800 INFO L226 Difference]: Without dead ends: 4402 [2021-06-05 15:11:26,801 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 519.0ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:11:26,804 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4402 states. [2021-06-05 15:11:26,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4402 to 3946. [2021-06-05 15:11:26,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203548795944233) internal successors, (16583), 3945 states have internal predecessors, (16583), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16583 transitions. [2021-06-05 15:11:26,853 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16583 transitions. Word has length 23 [2021-06-05 15:11:26,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:26,853 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16583 transitions. [2021-06-05 15:11:26,853 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:26,853 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16583 transitions. [2021-06-05 15:11:26,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:26,858 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:26,858 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:27,058 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 451 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable982 [2021-06-05 15:11:27,059 INFO L430 AbstractCegarLoop]: === Iteration 452 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:27,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:27,059 INFO L82 PathProgramCache]: Analyzing trace with hash 1838579659, now seen corresponding path program 297 times [2021-06-05 15:11:27,059 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:27,059 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [596797531] [2021-06-05 15:11:27,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:27,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:27,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:27,154 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:27,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [596797531] [2021-06-05 15:11:27,154 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [596797531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:27,154 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974572421] [2021-06-05 15:11:27,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 452 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:27,177 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:27,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:27,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:27,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:27,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:27,255 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:27,256 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:27,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:27,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:27,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:27,342 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:27,342 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [974572421] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:27,342 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:27,343 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:27,343 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130245447] [2021-06-05 15:11:27,343 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:27,343 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:27,343 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:27,343 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:27,343 INFO L87 Difference]: Start difference. First operand 3946 states and 16583 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:27,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:27,969 INFO L93 Difference]: Finished difference Result 4312 states and 17981 transitions. [2021-06-05 15:11:27,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:11:27,969 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:27,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:27,976 INFO L225 Difference]: With dead ends: 4312 [2021-06-05 15:11:27,976 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 15:11:27,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 521.4ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:27,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 15:11:28,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3950. [2021-06-05 15:11:28,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203342618384401) internal successors, (16599), 3949 states have internal predecessors, (16599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16599 transitions. [2021-06-05 15:11:28,050 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16599 transitions. Word has length 23 [2021-06-05 15:11:28,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:28,050 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16599 transitions. [2021-06-05 15:11:28,050 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:28,050 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16599 transitions. [2021-06-05 15:11:28,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:28,055 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:28,055 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:28,255 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 452 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable984 [2021-06-05 15:11:28,255 INFO L430 AbstractCegarLoop]: === Iteration 453 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:28,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:28,256 INFO L82 PathProgramCache]: Analyzing trace with hash -842820903, now seen corresponding path program 298 times [2021-06-05 15:11:28,256 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:28,256 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [465983014] [2021-06-05 15:11:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:28,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:28,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:28,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:28,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [465983014] [2021-06-05 15:11:28,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [465983014] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:28,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [951042297] [2021-06-05 15:11:28,359 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 453 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:28,382 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:28,382 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:28,383 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:28,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:28,458 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:28,458 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:28,459 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:28,467 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:28,467 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:28,468 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:28,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:28,543 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [951042297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:28,543 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:28,543 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:28,543 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130142828] [2021-06-05 15:11:28,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:28,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:28,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:28,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:28,544 INFO L87 Difference]: Start difference. First operand 3950 states and 16599 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:29,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:29,367 INFO L93 Difference]: Finished difference Result 4333 states and 18069 transitions. [2021-06-05 15:11:29,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:11:29,367 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:29,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:29,375 INFO L225 Difference]: With dead ends: 4333 [2021-06-05 15:11:29,375 INFO L226 Difference]: Without dead ends: 4312 [2021-06-05 15:11:29,375 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 694.4ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:11:29,379 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-05 15:11:29,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3942. [2021-06-05 15:11:29,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.203247906622685) internal successors, (16565), 3941 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:29,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16565 transitions. [2021-06-05 15:11:29,427 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16565 transitions. Word has length 23 [2021-06-05 15:11:29,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:29,427 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16565 transitions. [2021-06-05 15:11:29,427 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:29,427 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16565 transitions. [2021-06-05 15:11:29,432 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:29,432 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:29,432 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:29,632 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable986,453 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:29,632 INFO L430 AbstractCegarLoop]: === Iteration 454 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:29,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:29,633 INFO L82 PathProgramCache]: Analyzing trace with hash 1026024327, now seen corresponding path program 299 times [2021-06-05 15:11:29,633 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:29,633 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342002558] [2021-06-05 15:11:29,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:29,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:29,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:29,719 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:29,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342002558] [2021-06-05 15:11:29,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1342002558] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:29,719 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858471314] [2021-06-05 15:11:29,719 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 454 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:29,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:29,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:29,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:29,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:29,833 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:29,834 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:29,835 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:29,842 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:29,843 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:29,843 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:29,900 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:29,901 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1858471314] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:29,901 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:29,901 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:29,901 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472041850] [2021-06-05 15:11:29,901 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:29,901 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:29,901 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:29,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:29,901 INFO L87 Difference]: Start difference. First operand 3942 states and 16565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,615 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:30,615 INFO L93 Difference]: Finished difference Result 4444 states and 18530 transitions. [2021-06-05 15:11:30,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:30,615 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:30,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:30,623 INFO L225 Difference]: With dead ends: 4444 [2021-06-05 15:11:30,623 INFO L226 Difference]: Without dead ends: 4422 [2021-06-05 15:11:30,623 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 530.4ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:11:30,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4422 states. [2021-06-05 15:11:30,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4422 to 3948. [2021-06-05 15:11:30,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3948 states, 3947 states have (on average 4.203699011907778) internal successors, (16592), 3947 states have internal predecessors, (16592), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3948 states to 3948 states and 16592 transitions. [2021-06-05 15:11:30,694 INFO L78 Accepts]: Start accepts. Automaton has 3948 states and 16592 transitions. Word has length 23 [2021-06-05 15:11:30,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:30,694 INFO L482 AbstractCegarLoop]: Abstraction has 3948 states and 16592 transitions. [2021-06-05 15:11:30,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:30,694 INFO L276 IsEmpty]: Start isEmpty. Operand 3948 states and 16592 transitions. [2021-06-05 15:11:30,699 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:30,699 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:30,699 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:30,899 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 454 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable988 [2021-06-05 15:11:30,899 INFO L430 AbstractCegarLoop]: === Iteration 455 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:30,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:30,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1539551179, now seen corresponding path program 300 times [2021-06-05 15:11:30,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:30,900 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897083938] [2021-06-05 15:11:30,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:30,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:30,986 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:30,986 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897083938] [2021-06-05 15:11:30,986 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897083938] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:30,986 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688483144] [2021-06-05 15:11:30,986 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 455 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:31,009 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:11:31,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:31,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:31,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:31,118 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:11:31,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 45 treesize of output 68 [2021-06-05 15:11:31,120 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:31,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:31,132 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:31,132 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:45, output treesize:48 [2021-06-05 15:11:31,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:31,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1688483144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:31,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:31,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:31,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1334127076] [2021-06-05 15:11:31,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:31,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:31,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:31,195 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:31,195 INFO L87 Difference]: Start difference. First operand 3948 states and 16592 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:31,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:31,956 INFO L93 Difference]: Finished difference Result 4456 states and 18557 transitions. [2021-06-05 15:11:31,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:11:31,956 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:31,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:31,964 INFO L225 Difference]: With dead ends: 4456 [2021-06-05 15:11:31,964 INFO L226 Difference]: Without dead ends: 4431 [2021-06-05 15:11:31,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 521.5ms TimeCoverageRelationStatistics Valid=193, Invalid=1289, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:11:31,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4431 states. [2021-06-05 15:11:32,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4431 to 3952. [2021-06-05 15:11:32,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3952 states, 3951 states have (on average 4.2034927866362946) internal successors, (16608), 3951 states have internal predecessors, (16608), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:32,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3952 states to 3952 states and 16608 transitions. [2021-06-05 15:11:32,017 INFO L78 Accepts]: Start accepts. Automaton has 3952 states and 16608 transitions. Word has length 23 [2021-06-05 15:11:32,017 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:32,017 INFO L482 AbstractCegarLoop]: Abstraction has 3952 states and 16608 transitions. [2021-06-05 15:11:32,017 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:32,017 INFO L276 IsEmpty]: Start isEmpty. Operand 3952 states and 16608 transitions. [2021-06-05 15:11:32,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:32,022 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:32,022 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:32,222 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable990,455 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:32,222 INFO L430 AbstractCegarLoop]: === Iteration 456 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:32,222 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:32,222 INFO L82 PathProgramCache]: Analyzing trace with hash -1679704961, now seen corresponding path program 301 times [2021-06-05 15:11:32,223 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:32,223 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769206531] [2021-06-05 15:11:32,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:32,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:32,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:32,310 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:32,310 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769206531] [2021-06-05 15:11:32,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769206531] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:32,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914910372] [2021-06-05 15:11:32,311 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 456 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:32,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:32,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:32,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:32,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:32,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:32,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:32,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:32,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:32,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:32,494 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:32,494 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914910372] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:32,494 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:32,494 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:32,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2059554553] [2021-06-05 15:11:32,494 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:32,494 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:32,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:32,494 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:32,494 INFO L87 Difference]: Start difference. First operand 3952 states and 16608 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:33,317 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:33,318 INFO L93 Difference]: Finished difference Result 4363 states and 18192 transitions. [2021-06-05 15:11:33,318 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:33,318 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:33,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:33,326 INFO L225 Difference]: With dead ends: 4363 [2021-06-05 15:11:33,326 INFO L226 Difference]: Without dead ends: 4342 [2021-06-05 15:11:33,327 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 673.6ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:11:33,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4342 states. [2021-06-05 15:11:33,368 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4342 to 3944. [2021-06-05 15:11:33,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3944 states, 3943 states have (on average 4.2033984275932035) internal successors, (16574), 3943 states have internal predecessors, (16574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:33,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3944 states to 3944 states and 16574 transitions. [2021-06-05 15:11:33,381 INFO L78 Accepts]: Start accepts. Automaton has 3944 states and 16574 transitions. Word has length 23 [2021-06-05 15:11:33,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:33,381 INFO L482 AbstractCegarLoop]: Abstraction has 3944 states and 16574 transitions. [2021-06-05 15:11:33,381 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:33,381 INFO L276 IsEmpty]: Start isEmpty. Operand 3944 states and 16574 transitions. [2021-06-05 15:11:33,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:33,387 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:33,387 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:33,587 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 456 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable994 [2021-06-05 15:11:33,587 INFO L430 AbstractCegarLoop]: === Iteration 457 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:33,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:33,587 INFO L82 PathProgramCache]: Analyzing trace with hash -1398709109, now seen corresponding path program 302 times [2021-06-05 15:11:33,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:33,587 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408320888] [2021-06-05 15:11:33,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:33,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:33,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:33,687 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:33,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408320888] [2021-06-05 15:11:33,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408320888] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:33,687 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1508291844] [2021-06-05 15:11:33,687 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 457 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:33,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:33,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:33,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:33,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:33,774 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:33,775 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:33,776 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:33,784 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:33,785 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:33,785 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:33,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:33,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1508291844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:33,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:33,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:33,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9309209] [2021-06-05 15:11:33,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:33,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:33,887 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:33,887 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:33,887 INFO L87 Difference]: Start difference. First operand 3944 states and 16574 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:34,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:34,252 INFO L93 Difference]: Finished difference Result 4231 states and 17663 transitions. [2021-06-05 15:11:34,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:11:34,252 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:34,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:34,259 INFO L225 Difference]: With dead ends: 4231 [2021-06-05 15:11:34,259 INFO L226 Difference]: Without dead ends: 4205 [2021-06-05 15:11:34,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 373.0ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:34,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4205 states. [2021-06-05 15:11:34,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4205 to 3953. [2021-06-05 15:11:34,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3953 states, 3952 states have (on average 4.201923076923077) internal successors, (16606), 3952 states have internal predecessors, (16606), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:34,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3953 states to 3953 states and 16606 transitions. [2021-06-05 15:11:34,311 INFO L78 Accepts]: Start accepts. Automaton has 3953 states and 16606 transitions. Word has length 23 [2021-06-05 15:11:34,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:34,311 INFO L482 AbstractCegarLoop]: Abstraction has 3953 states and 16606 transitions. [2021-06-05 15:11:34,311 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:34,311 INFO L276 IsEmpty]: Start isEmpty. Operand 3953 states and 16606 transitions. [2021-06-05 15:11:34,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:34,316 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:34,316 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:34,516 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 457 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable996 [2021-06-05 15:11:34,517 INFO L430 AbstractCegarLoop]: === Iteration 458 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:34,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:34,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1854682119, now seen corresponding path program 303 times [2021-06-05 15:11:34,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:34,517 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367352476] [2021-06-05 15:11:34,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:34,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:34,611 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:34,611 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367352476] [2021-06-05 15:11:34,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367352476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825151688] [2021-06-05 15:11:34,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 458 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:34,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:34,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:34,698 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:34,699 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:34,700 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:34,708 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:34,709 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:34,709 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:34,805 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:34,805 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825151688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:34,805 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:34,806 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:34,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1057687251] [2021-06-05 15:11:34,806 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:34,806 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:34,806 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:34,806 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:34,806 INFO L87 Difference]: Start difference. First operand 3953 states and 16606 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:35,165 INFO L93 Difference]: Finished difference Result 4230 states and 17658 transitions. [2021-06-05 15:11:35,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:11:35,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:35,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:35,173 INFO L225 Difference]: With dead ends: 4230 [2021-06-05 15:11:35,173 INFO L226 Difference]: Without dead ends: 4202 [2021-06-05 15:11:35,173 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 329.4ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4202 states. [2021-06-05 15:11:35,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4202 to 3946. [2021-06-05 15:11:35,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203295310519645) internal successors, (16582), 3945 states have internal predecessors, (16582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16582 transitions. [2021-06-05 15:11:35,224 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16582 transitions. Word has length 23 [2021-06-05 15:11:35,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:35,224 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16582 transitions. [2021-06-05 15:11:35,224 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:35,224 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16582 transitions. [2021-06-05 15:11:35,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:35,229 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:35,229 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:35,429 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 458 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable998 [2021-06-05 15:11:35,430 INFO L430 AbstractCegarLoop]: === Iteration 459 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:35,430 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:35,430 INFO L82 PathProgramCache]: Analyzing trace with hash 1567560767, now seen corresponding path program 304 times [2021-06-05 15:11:35,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:35,430 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1620809674] [2021-06-05 15:11:35,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:35,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:35,528 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:35,529 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1620809674] [2021-06-05 15:11:35,529 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1620809674] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:35,529 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923212640] [2021-06-05 15:11:35,529 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 459 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:35,559 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:35,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:35,562 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:35,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:35,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:35,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:35,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:35,636 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:35,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:35,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:35,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:35,735 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923212640] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:35,735 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:35,735 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:35,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685040382] [2021-06-05 15:11:35,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:35,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:35,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:35,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:35,735 INFO L87 Difference]: Start difference. First operand 3946 states and 16582 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:36,195 INFO L93 Difference]: Finished difference Result 4279 states and 17852 transitions. [2021-06-05 15:11:36,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:11:36,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:36,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:36,203 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 15:11:36,203 INFO L226 Difference]: Without dead ends: 4253 [2021-06-05 15:11:36,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 477.5ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:36,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4253 states. [2021-06-05 15:11:36,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4253 to 3950. [2021-06-05 15:11:36,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203089389718916) internal successors, (16598), 3949 states have internal predecessors, (16598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16598 transitions. [2021-06-05 15:11:36,256 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16598 transitions. Word has length 23 [2021-06-05 15:11:36,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:36,256 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16598 transitions. [2021-06-05 15:11:36,256 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:36,256 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16598 transitions. [2021-06-05 15:11:36,261 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:36,261 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:36,261 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:36,461 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1000,459 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:36,461 INFO L430 AbstractCegarLoop]: === Iteration 460 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:36,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:36,462 INFO L82 PathProgramCache]: Analyzing trace with hash 1074343381, now seen corresponding path program 305 times [2021-06-05 15:11:36,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:36,462 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777690824] [2021-06-05 15:11:36,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:36,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:36,559 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:36,559 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:36,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777690824] [2021-06-05 15:11:36,559 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [777690824] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:36,559 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950018296] [2021-06-05 15:11:36,559 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 460 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:36,582 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:36,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:36,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:36,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:36,648 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:36,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:36,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:36,658 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:36,659 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:36,659 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:36,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:36,755 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1950018296] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:36,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:36,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:36,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192693751] [2021-06-05 15:11:36,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:36,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:36,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:36,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:36,756 INFO L87 Difference]: Start difference. First operand 3950 states and 16598 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:37,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:37,447 INFO L93 Difference]: Finished difference Result 4279 states and 17856 transitions. [2021-06-05 15:11:37,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:11:37,448 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:37,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:37,455 INFO L225 Difference]: With dead ends: 4279 [2021-06-05 15:11:37,455 INFO L226 Difference]: Without dead ends: 4258 [2021-06-05 15:11:37,456 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 629.3ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:11:37,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4258 states. [2021-06-05 15:11:37,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4258 to 3946. [2021-06-05 15:11:37,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3946 states, 3945 states have (on average 4.203295310519645) internal successors, (16582), 3945 states have internal predecessors, (16582), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:37,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3946 states to 3946 states and 16582 transitions. [2021-06-05 15:11:37,507 INFO L78 Accepts]: Start accepts. Automaton has 3946 states and 16582 transitions. Word has length 23 [2021-06-05 15:11:37,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:37,507 INFO L482 AbstractCegarLoop]: Abstraction has 3946 states and 16582 transitions. [2021-06-05 15:11:37,507 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:37,507 INFO L276 IsEmpty]: Start isEmpty. Operand 3946 states and 16582 transitions. [2021-06-05 15:11:37,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:37,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:37,512 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:37,713 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1002,460 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:37,713 INFO L430 AbstractCegarLoop]: === Iteration 461 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:37,713 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:37,713 INFO L82 PathProgramCache]: Analyzing trace with hash 2009119637, now seen corresponding path program 306 times [2021-06-05 15:11:37,713 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:37,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508763294] [2021-06-05 15:11:37,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:37,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:37,806 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:37,806 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508763294] [2021-06-05 15:11:37,806 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [508763294] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:37,806 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [766363279] [2021-06-05 15:11:37,806 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 461 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:37,829 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:37,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:37,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:11:37,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:37,901 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:37,921 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:11:37,921 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 29 treesize of output 57 [2021-06-05 15:11:37,922 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:37,936 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:37,936 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:37,936 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:37, output treesize:53 [2021-06-05 15:11:38,026 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:38,026 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [766363279] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:38,026 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:38,026 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:38,026 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [565177181] [2021-06-05 15:11:38,026 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:38,026 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:38,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:38,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:38,027 INFO L87 Difference]: Start difference. First operand 3946 states and 16582 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:38,645 INFO L93 Difference]: Finished difference Result 4260 states and 17781 transitions. [2021-06-05 15:11:38,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:11:38,646 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:38,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:38,653 INFO L225 Difference]: With dead ends: 4260 [2021-06-05 15:11:38,653 INFO L226 Difference]: Without dead ends: 4235 [2021-06-05 15:11:38,653 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 478.3ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:11:38,657 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4235 states. [2021-06-05 15:11:38,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4235 to 3950. [2021-06-05 15:11:38,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3950 states, 3949 states have (on average 4.203089389718916) internal successors, (16598), 3949 states have internal predecessors, (16598), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3950 states to 3950 states and 16598 transitions. [2021-06-05 15:11:38,707 INFO L78 Accepts]: Start accepts. Automaton has 3950 states and 16598 transitions. Word has length 23 [2021-06-05 15:11:38,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:38,707 INFO L482 AbstractCegarLoop]: Abstraction has 3950 states and 16598 transitions. [2021-06-05 15:11:38,707 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:38,707 INFO L276 IsEmpty]: Start isEmpty. Operand 3950 states and 16598 transitions. [2021-06-05 15:11:38,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:38,712 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:38,712 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:38,913 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 461 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1004 [2021-06-05 15:11:38,913 INFO L430 AbstractCegarLoop]: === Iteration 462 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:38,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:38,913 INFO L82 PathProgramCache]: Analyzing trace with hash 996427105, now seen corresponding path program 307 times [2021-06-05 15:11:38,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:38,913 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882833377] [2021-06-05 15:11:38,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:38,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:39,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:39,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882833377] [2021-06-05 15:11:39,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882833377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:39,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044605466] [2021-06-05 15:11:39,008 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 462 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:39,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:39,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:39,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:39,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:39,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:39,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:39,105 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:39,105 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:39,105 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:39,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:39,202 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044605466] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:39,202 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:39,202 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:39,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349418809] [2021-06-05 15:11:39,203 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:39,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:39,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:39,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:39,203 INFO L87 Difference]: Start difference. First operand 3950 states and 16598 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:39,823 INFO L93 Difference]: Finished difference Result 4278 states and 17852 transitions. [2021-06-05 15:11:39,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:11:39,823 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:39,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:39,830 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 15:11:39,830 INFO L226 Difference]: Without dead ends: 4257 [2021-06-05 15:11:39,831 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 571.4ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:39,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4257 states. [2021-06-05 15:11:39,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4257 to 3942. [2021-06-05 15:11:39,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.203247906622685) internal successors, (16565), 3941 states have internal predecessors, (16565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16565 transitions. [2021-06-05 15:11:39,883 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16565 transitions. Word has length 23 [2021-06-05 15:11:39,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:39,883 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16565 transitions. [2021-06-05 15:11:39,883 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:39,883 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16565 transitions. [2021-06-05 15:11:39,888 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:39,888 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:39,888 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:40,088 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 462 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1008 [2021-06-05 15:11:40,088 INFO L430 AbstractCegarLoop]: === Iteration 463 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:40,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:40,089 INFO L82 PathProgramCache]: Analyzing trace with hash 2145293225, now seen corresponding path program 308 times [2021-06-05 15:11:40,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:40,089 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643445573] [2021-06-05 15:11:40,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:40,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:40,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:40,177 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643445573] [2021-06-05 15:11:40,177 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643445573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:40,177 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914195826] [2021-06-05 15:11:40,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 463 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:40,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:40,202 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:40,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:40,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:40,294 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:40,294 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:40,295 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:40,303 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:40,303 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:40,303 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:40,364 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:40,365 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914195826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:40,365 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:40,365 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:40,365 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179127961] [2021-06-05 15:11:40,365 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:40,365 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:40,365 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:40,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:40,365 INFO L87 Difference]: Start difference. First operand 3942 states and 16565 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:40,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:40,829 INFO L93 Difference]: Finished difference Result 4391 states and 18288 transitions. [2021-06-05 15:11:40,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:11:40,829 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:40,829 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:40,837 INFO L225 Difference]: With dead ends: 4391 [2021-06-05 15:11:40,837 INFO L226 Difference]: Without dead ends: 4356 [2021-06-05 15:11:40,837 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:40,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4356 states. [2021-06-05 15:11:40,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4356 to 3942. [2021-06-05 15:11:40,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3942 states, 3941 states have (on average 4.202232935803096) internal successors, (16561), 3941 states have internal predecessors, (16561), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:40,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3942 states to 3942 states and 16561 transitions. [2021-06-05 15:11:40,919 INFO L78 Accepts]: Start accepts. Automaton has 3942 states and 16561 transitions. Word has length 23 [2021-06-05 15:11:40,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:40,919 INFO L482 AbstractCegarLoop]: Abstraction has 3942 states and 16561 transitions. [2021-06-05 15:11:40,919 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:40,919 INFO L276 IsEmpty]: Start isEmpty. Operand 3942 states and 16561 transitions. [2021-06-05 15:11:40,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:40,924 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:40,924 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:41,124 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1010,463 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:41,124 INFO L430 AbstractCegarLoop]: === Iteration 464 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:41,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:41,125 INFO L82 PathProgramCache]: Analyzing trace with hash -404390035, now seen corresponding path program 309 times [2021-06-05 15:11:41,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:41,125 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032627329] [2021-06-05 15:11:41,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:41,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:41,215 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:41,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032627329] [2021-06-05 15:11:41,215 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1032627329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:41,215 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240187838] [2021-06-05 15:11:41,215 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 464 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:41,238 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:41,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:41,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:11:41,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:41,314 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:41,315 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:11:41,320 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:41,320 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 22 treesize of output 30 [2021-06-05 15:11:41,321 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:41,329 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:41,329 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:41,330 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:29 [2021-06-05 15:11:41,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:41,393 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240187838] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:41,393 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:41,393 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:41,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924004068] [2021-06-05 15:11:41,393 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:41,393 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:41,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:41,393 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:41,393 INFO L87 Difference]: Start difference. First operand 3942 states and 16561 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,746 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:41,746 INFO L93 Difference]: Finished difference Result 4222 states and 17622 transitions. [2021-06-05 15:11:41,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:11:41,746 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:41,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:41,754 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 15:11:41,754 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 15:11:41,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 270.0ms TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:11:41,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 15:11:41,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3949. [2021-06-05 15:11:41,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3949 states, 3948 states have (on average 4.200861195542046) internal successors, (16585), 3948 states have internal predecessors, (16585), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,807 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3949 states to 3949 states and 16585 transitions. [2021-06-05 15:11:41,808 INFO L78 Accepts]: Start accepts. Automaton has 3949 states and 16585 transitions. Word has length 23 [2021-06-05 15:11:41,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:41,808 INFO L482 AbstractCegarLoop]: Abstraction has 3949 states and 16585 transitions. [2021-06-05 15:11:41,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:41,808 INFO L276 IsEmpty]: Start isEmpty. Operand 3949 states and 16585 transitions. [2021-06-05 15:11:41,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:41,813 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:41,813 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:42,013 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 464 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1012 [2021-06-05 15:11:42,013 INFO L430 AbstractCegarLoop]: === Iteration 465 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:42,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:42,014 INFO L82 PathProgramCache]: Analyzing trace with hash -1445966103, now seen corresponding path program 310 times [2021-06-05 15:11:42,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:42,014 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1831448745] [2021-06-05 15:11:42,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:42,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:42,102 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:42,103 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:42,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1831448745] [2021-06-05 15:11:42,103 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1831448745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,103 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117186745] [2021-06-05 15:11:42,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 465 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:42,125 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:42,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:42,126 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:42,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:42,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:42,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:42,211 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:42,211 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:11:42,289 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:42,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [117186745] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:42,289 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:42,289 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:42,289 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935398417] [2021-06-05 15:11:42,289 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:42,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:42,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:42,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:42,289 INFO L87 Difference]: Start difference. First operand 3949 states and 16585 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:42,681 INFO L93 Difference]: Finished difference Result 4223 states and 17625 transitions. [2021-06-05 15:11:42,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:11:42,681 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:42,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:42,689 INFO L225 Difference]: With dead ends: 4223 [2021-06-05 15:11:42,689 INFO L226 Difference]: Without dead ends: 4191 [2021-06-05 15:11:42,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 317.9ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:42,692 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-06-05 15:11:42,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3931. [2021-06-05 15:11:42,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 15:11:42,741 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 15:11:42,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:42,741 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 15:11:42,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:42,741 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 15:11:42,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:42,746 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:42,747 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:42,947 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 465 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1013 [2021-06-05 15:11:42,947 INFO L430 AbstractCegarLoop]: === Iteration 466 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:42,947 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:42,947 INFO L82 PathProgramCache]: Analyzing trace with hash -389621131, now seen corresponding path program 311 times [2021-06-05 15:11:42,947 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:42,947 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2037316985] [2021-06-05 15:11:42,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:42,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:43,033 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:43,034 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:43,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2037316985] [2021-06-05 15:11:43,034 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2037316985] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:43,034 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [552657868] [2021-06-05 15:11:43,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 466 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:43,056 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:11:43,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:43,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:43,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:43,146 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:43,146 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:43,147 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:43,155 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:43,155 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:43,156 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:43,216 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:43,216 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [552657868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:43,217 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:43,217 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:43,217 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468519859] [2021-06-05 15:11:43,217 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:43,217 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:43,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:43,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:43,217 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:43,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:43,739 INFO L93 Difference]: Finished difference Result 4495 states and 18698 transitions. [2021-06-05 15:11:43,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:11:43,739 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:43,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:43,746 INFO L225 Difference]: With dead ends: 4495 [2021-06-05 15:11:43,746 INFO L226 Difference]: Without dead ends: 4460 [2021-06-05 15:11:43,747 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 399.6ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:11:43,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-06-05 15:11:43,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3939. [2021-06-05 15:11:43,790 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3939 states, 3938 states have (on average 4.203148806500762) internal successors, (16552), 3938 states have internal predecessors, (16552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:43,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3939 states to 3939 states and 16552 transitions. [2021-06-05 15:11:43,798 INFO L78 Accepts]: Start accepts. Automaton has 3939 states and 16552 transitions. Word has length 23 [2021-06-05 15:11:43,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:43,798 INFO L482 AbstractCegarLoop]: Abstraction has 3939 states and 16552 transitions. [2021-06-05 15:11:43,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:43,798 INFO L276 IsEmpty]: Start isEmpty. Operand 3939 states and 16552 transitions. [2021-06-05 15:11:43,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:43,803 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:43,803 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:44,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 466 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1015 [2021-06-05 15:11:44,004 INFO L430 AbstractCegarLoop]: === Iteration 467 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:44,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:44,004 INFO L82 PathProgramCache]: Analyzing trace with hash -1194020355, now seen corresponding path program 312 times [2021-06-05 15:11:44,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:44,004 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398341435] [2021-06-05 15:11:44,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:44,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:44,095 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:44,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398341435] [2021-06-05 15:11:44,095 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398341435] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:44,095 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224959533] [2021-06-05 15:11:44,096 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 467 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:44,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:44,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:44,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:44,123 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:44,222 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:11:44,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:11:44,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:44,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:44,235 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:44,235 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:26, output treesize:38 [2021-06-05 15:11:44,310 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:44,310 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224959533] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:44,311 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:44,311 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:44,311 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363163821] [2021-06-05 15:11:44,311 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:44,311 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:44,311 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:44,311 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:44,311 INFO L87 Difference]: Start difference. First operand 3939 states and 16552 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:44,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:44,953 INFO L93 Difference]: Finished difference Result 4392 states and 18301 transitions. [2021-06-05 15:11:44,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:11:44,953 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:44,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:44,960 INFO L225 Difference]: With dead ends: 4392 [2021-06-05 15:11:44,960 INFO L226 Difference]: Without dead ends: 4366 [2021-06-05 15:11:44,961 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 465.9ms TimeCoverageRelationStatistics Valid=152, Invalid=970, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:11:44,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4366 states. [2021-06-05 15:11:45,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4366 to 3943. [2021-06-05 15:11:45,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3943 states, 3942 states have (on average 4.202942668696093) internal successors, (16568), 3942 states have internal predecessors, (16568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:45,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3943 states to 3943 states and 16568 transitions. [2021-06-05 15:11:45,014 INFO L78 Accepts]: Start accepts. Automaton has 3943 states and 16568 transitions. Word has length 23 [2021-06-05 15:11:45,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:45,014 INFO L482 AbstractCegarLoop]: Abstraction has 3943 states and 16568 transitions. [2021-06-05 15:11:45,014 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:45,014 INFO L276 IsEmpty]: Start isEmpty. Operand 3943 states and 16568 transitions. [2021-06-05 15:11:45,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:45,019 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:45,019 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:45,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1017,467 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:45,220 INFO L430 AbstractCegarLoop]: === Iteration 468 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:45,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:45,220 INFO L82 PathProgramCache]: Analyzing trace with hash 419546379, now seen corresponding path program 313 times [2021-06-05 15:11:45,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:45,220 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242503866] [2021-06-05 15:11:45,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:45,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:45,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:45,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:45,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242503866] [2021-06-05 15:11:45,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1242503866] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:45,312 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [440936472] [2021-06-05 15:11:45,312 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 468 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:45,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:45,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:45,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:45,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:45,409 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:45,410 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:45,418 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:45,418 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:45,418 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:45,493 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:45,493 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [440936472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:45,493 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:45,493 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:45,493 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657709920] [2021-06-05 15:11:45,493 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:45,493 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:45,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:45,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:45,493 INFO L87 Difference]: Start difference. First operand 3943 states and 16568 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:46,281 INFO L93 Difference]: Finished difference Result 4405 states and 18347 transitions. [2021-06-05 15:11:46,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:11:46,282 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:46,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:46,289 INFO L225 Difference]: With dead ends: 4405 [2021-06-05 15:11:46,289 INFO L226 Difference]: Without dead ends: 4384 [2021-06-05 15:11:46,289 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 634.7ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:11:46,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4384 states. [2021-06-05 15:11:46,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4384 to 3931. [2021-06-05 15:11:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 15:11:46,341 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 15:11:46,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:46,341 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 15:11:46,341 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:46,341 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 15:11:46,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:46,347 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:46,347 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:46,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1021,468 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:46,547 INFO L430 AbstractCegarLoop]: === Iteration 469 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:46,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:46,547 INFO L82 PathProgramCache]: Analyzing trace with hash 510691453, now seen corresponding path program 314 times [2021-06-05 15:11:46,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:46,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796038591] [2021-06-05 15:11:46,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:46,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:46,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:46,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:46,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796038591] [2021-06-05 15:11:46,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [796038591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:46,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238948672] [2021-06-05 15:11:46,642 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 469 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:46,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:46,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:46,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:46,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:46,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:46,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:46,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:46,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:46,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:46,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:46,841 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:46,841 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238948672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:46,841 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:46,841 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:46,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333662402] [2021-06-05 15:11:46,841 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:46,842 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:46,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:46,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:46,842 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:47,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:47,275 INFO L93 Difference]: Finished difference Result 4178 states and 17449 transitions. [2021-06-05 15:11:47,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:11:47,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:47,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:47,283 INFO L225 Difference]: With dead ends: 4178 [2021-06-05 15:11:47,283 INFO L226 Difference]: Without dead ends: 4152 [2021-06-05 15:11:47,283 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 368.2ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:47,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4152 states. [2021-06-05 15:11:47,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4152 to 3938. [2021-06-05 15:11:47,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3938 states, 3937 states have (on average 4.201676403352807) internal successors, (16542), 3937 states have internal predecessors, (16542), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:47,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3938 states to 3938 states and 16542 transitions. [2021-06-05 15:11:47,335 INFO L78 Accepts]: Start accepts. Automaton has 3938 states and 16542 transitions. Word has length 23 [2021-06-05 15:11:47,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:47,335 INFO L482 AbstractCegarLoop]: Abstraction has 3938 states and 16542 transitions. [2021-06-05 15:11:47,335 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:47,335 INFO L276 IsEmpty]: Start isEmpty. Operand 3938 states and 16542 transitions. [2021-06-05 15:11:47,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:47,340 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:47,340 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:47,540 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1023,469 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:47,540 INFO L430 AbstractCegarLoop]: === Iteration 470 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:47,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:47,541 INFO L82 PathProgramCache]: Analyzing trace with hash -530884615, now seen corresponding path program 315 times [2021-06-05 15:11:47,541 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:47,541 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [925927787] [2021-06-05 15:11:47,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:47,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:47,634 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:47,634 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:47,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [925927787] [2021-06-05 15:11:47,634 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [925927787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:47,634 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190412718] [2021-06-05 15:11:47,634 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 470 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:47,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:11:47,657 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:47,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:47,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:47,720 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:47,721 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:47,722 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:47,730 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:47,731 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:47,731 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:47,827 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:47,828 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [190412718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:47,828 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:47,828 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:47,828 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1577336300] [2021-06-05 15:11:47,828 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:47,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:47,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:47,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:47,828 INFO L87 Difference]: Start difference. First operand 3938 states and 16542 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:48,151 INFO L93 Difference]: Finished difference Result 4177 states and 17444 transitions. [2021-06-05 15:11:48,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:11:48,151 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:48,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:48,158 INFO L225 Difference]: With dead ends: 4177 [2021-06-05 15:11:48,158 INFO L226 Difference]: Without dead ends: 4149 [2021-06-05 15:11:48,159 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 327.8ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:11:48,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4149 states. [2021-06-05 15:11:48,199 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4149 to 3931. [2021-06-05 15:11:48,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 15:11:48,210 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 15:11:48,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:48,210 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 15:11:48,210 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:48,210 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 15:11:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:48,216 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:48,216 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:48,416 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 470 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1025 [2021-06-05 15:11:48,416 INFO L430 AbstractCegarLoop]: === Iteration 471 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:48,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:48,416 INFO L82 PathProgramCache]: Analyzing trace with hash -818005967, now seen corresponding path program 316 times [2021-06-05 15:11:48,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:48,416 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [298435371] [2021-06-05 15:11:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:48,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:48,515 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [298435371] [2021-06-05 15:11:48,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [298435371] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:48,515 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646384] [2021-06-05 15:11:48,515 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 471 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:48,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:48,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:48,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:48,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:48,603 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:48,604 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:48,605 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:48,613 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:48,614 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:48,614 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:48,738 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:48,738 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1646384] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:48,738 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:48,738 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:48,738 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [734939441] [2021-06-05 15:11:48,738 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:48,738 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:48,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:48,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:48,739 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:49,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:49,183 INFO L93 Difference]: Finished difference Result 4222 states and 17622 transitions. [2021-06-05 15:11:49,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:11:49,183 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:49,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:49,190 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 15:11:49,190 INFO L226 Difference]: Without dead ends: 4196 [2021-06-05 15:11:49,190 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 467.9ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:11:49,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4196 states. [2021-06-05 15:11:49,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4196 to 3935. [2021-06-05 15:11:49,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3935 states, 3934 states have (on average 4.202846975088968) internal successors, (16534), 3934 states have internal predecessors, (16534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:49,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3935 states to 3935 states and 16534 transitions. [2021-06-05 15:11:49,243 INFO L78 Accepts]: Start accepts. Automaton has 3935 states and 16534 transitions. Word has length 23 [2021-06-05 15:11:49,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:49,243 INFO L482 AbstractCegarLoop]: Abstraction has 3935 states and 16534 transitions. [2021-06-05 15:11:49,244 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:49,244 INFO L276 IsEmpty]: Start isEmpty. Operand 3935 states and 16534 transitions. [2021-06-05 15:11:49,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:49,249 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:49,249 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:49,449 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 471 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1027 [2021-06-05 15:11:49,449 INFO L430 AbstractCegarLoop]: === Iteration 472 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:49,449 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:49,449 INFO L82 PathProgramCache]: Analyzing trace with hash -1311223353, now seen corresponding path program 317 times [2021-06-05 15:11:49,449 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:49,449 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [841539009] [2021-06-05 15:11:49,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:49,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:49,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:49,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [841539009] [2021-06-05 15:11:49,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [841539009] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:49,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1085553933] [2021-06-05 15:11:49,547 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 472 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:49,570 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:49,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:49,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:49,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:49,636 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:49,636 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:49,637 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:49,645 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:49,646 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:49,646 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:11:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:49,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1085553933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:49,742 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:49,742 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:49,742 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968460771] [2021-06-05 15:11:49,742 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:49,742 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:49,742 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:49,742 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:49,742 INFO L87 Difference]: Start difference. First operand 3935 states and 16534 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:50,401 INFO L93 Difference]: Finished difference Result 4228 states and 17650 transitions. [2021-06-05 15:11:50,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:11:50,401 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:50,401 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:50,408 INFO L225 Difference]: With dead ends: 4228 [2021-06-05 15:11:50,408 INFO L226 Difference]: Without dead ends: 4207 [2021-06-05 15:11:50,408 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:11:50,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4207 states. [2021-06-05 15:11:50,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4207 to 3931. [2021-06-05 15:11:50,450 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3931 states, 3930 states have (on average 4.203053435114504) internal successors, (16518), 3930 states have internal predecessors, (16518), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3931 states to 3931 states and 16518 transitions. [2021-06-05 15:11:50,459 INFO L78 Accepts]: Start accepts. Automaton has 3931 states and 16518 transitions. Word has length 23 [2021-06-05 15:11:50,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:50,459 INFO L482 AbstractCegarLoop]: Abstraction has 3931 states and 16518 transitions. [2021-06-05 15:11:50,459 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:50,459 INFO L276 IsEmpty]: Start isEmpty. Operand 3931 states and 16518 transitions. [2021-06-05 15:11:50,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:50,464 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:50,464 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:50,664 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1029,472 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:50,665 INFO L430 AbstractCegarLoop]: === Iteration 473 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:50,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:50,665 INFO L82 PathProgramCache]: Analyzing trace with hash -1389139629, now seen corresponding path program 318 times [2021-06-05 15:11:50,665 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:50,665 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113318999] [2021-06-05 15:11:50,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:50,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:50,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:50,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:50,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113318999] [2021-06-05 15:11:50,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [113318999] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:50,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174702199] [2021-06-05 15:11:50,758 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 473 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:50,781 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:11:50,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:50,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:50,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:50,853 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:11:50,872 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:11:50,872 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:11:50,874 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:50,886 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:50,886 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:50,887 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:49 [2021-06-05 15:11:51,009 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:51,009 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174702199] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:51,009 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:51,009 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:51,009 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144852477] [2021-06-05 15:11:51,009 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:51,009 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:51,009 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:51,009 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:51,010 INFO L87 Difference]: Start difference. First operand 3931 states and 16518 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:51,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:51,754 INFO L93 Difference]: Finished difference Result 4289 states and 17885 transitions. [2021-06-05 15:11:51,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:11:51,754 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:51,754 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:51,761 INFO L225 Difference]: With dead ends: 4289 [2021-06-05 15:11:51,761 INFO L226 Difference]: Without dead ends: 4268 [2021-06-05 15:11:51,761 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 531.2ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:11:51,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4268 states. [2021-06-05 15:11:51,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4268 to 3929. [2021-06-05 15:11:51,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3929 states, 3928 states have (on average 4.20315682281059) internal successors, (16510), 3928 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:51,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3929 states to 3929 states and 16510 transitions. [2021-06-05 15:11:51,813 INFO L78 Accepts]: Start accepts. Automaton has 3929 states and 16510 transitions. Word has length 23 [2021-06-05 15:11:51,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:51,813 INFO L482 AbstractCegarLoop]: Abstraction has 3929 states and 16510 transitions. [2021-06-05 15:11:51,813 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:51,813 INFO L276 IsEmpty]: Start isEmpty. Operand 3929 states and 16510 transitions. [2021-06-05 15:11:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:51,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:51,818 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:52,019 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1031,473 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:52,019 INFO L430 AbstractCegarLoop]: === Iteration 474 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash -1733706733, now seen corresponding path program 319 times [2021-06-05 15:11:52,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:52,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710295927] [2021-06-05 15:11:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:52,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:52,104 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:52,104 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710295927] [2021-06-05 15:11:52,104 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710295927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:52,104 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1343464505] [2021-06-05 15:11:52,104 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 474 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:52,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:52,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:52,128 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:52,212 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:52,212 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:52,213 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:52,221 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:52,221 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:52,221 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:52,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:52,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1343464505] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:52,278 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:52,278 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:52,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100007146] [2021-06-05 15:11:52,278 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:52,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:52,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:52,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:52,279 INFO L87 Difference]: Start difference. First operand 3929 states and 16510 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:53,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:53,140 INFO L93 Difference]: Finished difference Result 4709 states and 19578 transitions. [2021-06-05 15:11:53,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:11:53,140 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:53,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:53,149 INFO L225 Difference]: With dead ends: 4709 [2021-06-05 15:11:53,149 INFO L226 Difference]: Without dead ends: 4687 [2021-06-05 15:11:53,150 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 545.9ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:11:53,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4687 states. [2021-06-05 15:11:53,193 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4687 to 3941. [2021-06-05 15:11:53,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 4.201522842639594) internal successors, (16554), 3940 states have internal predecessors, (16554), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:53,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 16554 transitions. [2021-06-05 15:11:53,205 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 16554 transitions. Word has length 23 [2021-06-05 15:11:53,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:53,205 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 16554 transitions. [2021-06-05 15:11:53,205 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:53,205 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 16554 transitions. [2021-06-05 15:11:53,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:53,210 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:53,210 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:53,410 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 474 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1035 [2021-06-05 15:11:53,410 INFO L430 AbstractCegarLoop]: === Iteration 475 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:53,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:53,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1148372781, now seen corresponding path program 320 times [2021-06-05 15:11:53,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:53,411 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365461750] [2021-06-05 15:11:53,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:53,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:53,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:53,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365461750] [2021-06-05 15:11:53,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365461750] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:53,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [647073788] [2021-06-05 15:11:53,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 475 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:53,524 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:11:53,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:53,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:53,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:53,595 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:53,596 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:53,596 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:53,604 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:53,605 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:53,605 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:53,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:53,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [647073788] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:53,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:53,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:53,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219770287] [2021-06-05 15:11:53,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:53,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:53,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:53,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:53,682 INFO L87 Difference]: Start difference. First operand 3941 states and 16554 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:54,386 INFO L93 Difference]: Finished difference Result 4573 states and 19006 transitions. [2021-06-05 15:11:54,386 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:11:54,386 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:54,386 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:54,394 INFO L225 Difference]: With dead ends: 4573 [2021-06-05 15:11:54,394 INFO L226 Difference]: Without dead ends: 4547 [2021-06-05 15:11:54,394 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 512.6ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:54,398 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4547 states. [2021-06-05 15:11:54,437 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4547 to 3945. [2021-06-05 15:11:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.20131845841785) internal successors, (16570), 3944 states have internal predecessors, (16570), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16570 transitions. [2021-06-05 15:11:54,449 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16570 transitions. Word has length 23 [2021-06-05 15:11:54,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:54,449 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16570 transitions. [2021-06-05 15:11:54,449 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:54,449 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16570 transitions. [2021-06-05 15:11:54,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:54,455 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:54,455 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:54,655 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1037,475 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:54,655 INFO L430 AbstractCegarLoop]: === Iteration 476 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:54,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:54,656 INFO L82 PathProgramCache]: Analyzing trace with hash 465193953, now seen corresponding path program 321 times [2021-06-05 15:11:54,656 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:54,656 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [684111591] [2021-06-05 15:11:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:54,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:54,745 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:54,746 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [684111591] [2021-06-05 15:11:54,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [684111591] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:54,746 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1310588233] [2021-06-05 15:11:54,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 476 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:54,769 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:11:54,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:54,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:54,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:54,841 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:54,841 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:54,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:54,849 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:54,850 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:54,850 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:54,924 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:54,925 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1310588233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:54,925 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:54,925 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:54,925 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557230497] [2021-06-05 15:11:54,925 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:54,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:54,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:54,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:54,925 INFO L87 Difference]: Start difference. First operand 3945 states and 16570 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,608 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:55,609 INFO L93 Difference]: Finished difference Result 4548 states and 18917 transitions. [2021-06-05 15:11:55,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:11:55,609 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:55,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:55,617 INFO L225 Difference]: With dead ends: 4548 [2021-06-05 15:11:55,617 INFO L226 Difference]: Without dead ends: 4527 [2021-06-05 15:11:55,617 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 616.8ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:11:55,621 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4527 states. [2021-06-05 15:11:55,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4527 to 3937. [2021-06-05 15:11:55,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3937 states, 3936 states have (on average 4.201219512195122) internal successors, (16536), 3936 states have internal predecessors, (16536), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3937 states to 3937 states and 16536 transitions. [2021-06-05 15:11:55,670 INFO L78 Accepts]: Start accepts. Automaton has 3937 states and 16536 transitions. Word has length 23 [2021-06-05 15:11:55,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:55,670 INFO L482 AbstractCegarLoop]: Abstraction has 3937 states and 16536 transitions. [2021-06-05 15:11:55,670 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:55,670 INFO L276 IsEmpty]: Start isEmpty. Operand 3937 states and 16536 transitions. [2021-06-05 15:11:55,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:55,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:55,675 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:55,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 476 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1039 [2021-06-05 15:11:55,876 INFO L430 AbstractCegarLoop]: === Iteration 477 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:55,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:55,876 INFO L82 PathProgramCache]: Analyzing trace with hash -1384209355, now seen corresponding path program 322 times [2021-06-05 15:11:55,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:55,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698328541] [2021-06-05 15:11:55,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:55,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:55,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:55,961 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:55,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698328541] [2021-06-05 15:11:55,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698328541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:55,961 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964146958] [2021-06-05 15:11:55,961 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 477 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:55,983 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:11:55,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:55,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:55,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:56,066 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:56,067 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:56,068 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:56,075 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:56,076 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:56,076 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:56,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:56,136 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [964146958] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:56,136 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:56,136 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:56,136 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180003730] [2021-06-05 15:11:56,136 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:56,136 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:56,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:56,137 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:56,137 INFO L87 Difference]: Start difference. First operand 3937 states and 16536 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:56,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:56,668 INFO L93 Difference]: Finished difference Result 4683 states and 19424 transitions. [2021-06-05 15:11:56,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:11:56,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:56,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:56,677 INFO L225 Difference]: With dead ends: 4683 [2021-06-05 15:11:56,677 INFO L226 Difference]: Without dead ends: 4648 [2021-06-05 15:11:56,677 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 420.1ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:56,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4648 states. [2021-06-05 15:11:56,720 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4648 to 3930. [2021-06-05 15:11:56,723 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3930 states, 3929 states have (on average 4.198014762025961) internal successors, (16494), 3929 states have internal predecessors, (16494), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:56,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3930 states to 3930 states and 16494 transitions. [2021-06-05 15:11:56,731 INFO L78 Accepts]: Start accepts. Automaton has 3930 states and 16494 transitions. Word has length 23 [2021-06-05 15:11:56,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:56,731 INFO L482 AbstractCegarLoop]: Abstraction has 3930 states and 16494 transitions. [2021-06-05 15:11:56,731 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:56,732 INFO L276 IsEmpty]: Start isEmpty. Operand 3930 states and 16494 transitions. [2021-06-05 15:11:56,738 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:56,738 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:56,738 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:56,938 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1041,477 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:56,938 INFO L430 AbstractCegarLoop]: === Iteration 478 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:56,938 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:56,938 INFO L82 PathProgramCache]: Analyzing trace with hash -1302810299, now seen corresponding path program 323 times [2021-06-05 15:11:56,938 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:56,938 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698571485] [2021-06-05 15:11:56,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:56,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:57,031 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:57,031 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698571485] [2021-06-05 15:11:57,031 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698571485] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:57,031 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689412671] [2021-06-05 15:11:57,031 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 478 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:57,055 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:11:57,055 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:57,055 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:57,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:57,126 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:57,127 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:11:57,128 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:57,135 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:57,136 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:57,136 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:11:57,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:57,214 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [689412671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:57,215 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:57,215 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:57,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [803892160] [2021-06-05 15:11:57,215 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:57,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:57,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:57,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:57,215 INFO L87 Difference]: Start difference. First operand 3930 states and 16494 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:57,812 INFO L93 Difference]: Finished difference Result 4465 states and 18574 transitions. [2021-06-05 15:11:57,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:11:57,812 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:57,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:57,820 INFO L225 Difference]: With dead ends: 4465 [2021-06-05 15:11:57,820 INFO L226 Difference]: Without dead ends: 4439 [2021-06-05 15:11:57,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 481.8ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:11:57,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4439 states. [2021-06-05 15:11:57,860 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4439 to 3934. [2021-06-05 15:11:57,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3934 states, 3933 states have (on average 4.197813374014747) internal successors, (16510), 3933 states have internal predecessors, (16510), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3934 states to 3934 states and 16510 transitions. [2021-06-05 15:11:57,871 INFO L78 Accepts]: Start accepts. Automaton has 3934 states and 16510 transitions. Word has length 23 [2021-06-05 15:11:57,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:57,872 INFO L482 AbstractCegarLoop]: Abstraction has 3934 states and 16510 transitions. [2021-06-05 15:11:57,872 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:57,872 INFO L276 IsEmpty]: Start isEmpty. Operand 3934 states and 16510 transitions. [2021-06-05 15:11:57,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:57,877 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:57,877 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:58,077 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1043,478 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:58,077 INFO L430 AbstractCegarLoop]: === Iteration 479 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:58,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:58,078 INFO L82 PathProgramCache]: Analyzing trace with hash 310756435, now seen corresponding path program 324 times [2021-06-05 15:11:58,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:58,078 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514806619] [2021-06-05 15:11:58,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:58,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:58,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:58,167 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514806619] [2021-06-05 15:11:58,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514806619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,167 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1923745727] [2021-06-05 15:11:58,167 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 479 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:58,190 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:11:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:11:58,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:58,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:58,288 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:11:58,288 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 51 treesize of output 68 [2021-06-05 15:11:58,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,317 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:58,318 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:58,318 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:51, output treesize:48 [2021-06-05 15:11:58,383 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:58,384 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1923745727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:58,384 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:58,384 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:11:58,384 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1561547842] [2021-06-05 15:11:58,384 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:11:58,384 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:58,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:11:58,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:11:58,384 INFO L87 Difference]: Start difference. First operand 3934 states and 16510 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:11:59,223 INFO L93 Difference]: Finished difference Result 4414 states and 18376 transitions. [2021-06-05 15:11:59,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:11:59,223 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:11:59,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:11:59,231 INFO L225 Difference]: With dead ends: 4414 [2021-06-05 15:11:59,231 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 15:11:59,231 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 556.6ms TimeCoverageRelationStatistics Valid=210, Invalid=1196, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:11:59,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 15:11:59,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3914. [2021-06-05 15:11:59,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 4.196779964221824) internal successors, (16422), 3913 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 16422 transitions. [2021-06-05 15:11:59,283 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 16422 transitions. Word has length 23 [2021-06-05 15:11:59,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:11:59,283 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 16422 transitions. [2021-06-05 15:11:59,283 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:11:59,283 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 16422 transitions. [2021-06-05 15:11:59,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:11:59,288 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:11:59,288 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:11:59,488 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 479 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1045 [2021-06-05 15:11:59,488 INFO L430 AbstractCegarLoop]: === Iteration 480 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:11:59,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:11:59,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1667247717, now seen corresponding path program 325 times [2021-06-05 15:11:59,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:11:59,489 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949013698] [2021-06-05 15:11:59,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:11:59,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:59,572 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:59,573 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:11:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949013698] [2021-06-05 15:11:59,573 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949013698] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:59,573 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477966634] [2021-06-05 15:11:59,573 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 480 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:11:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:11:59,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:11:59,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:11:59,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:59,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:11:59,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:11:59,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:11:59,696 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:11:59,696 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:11:59,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:11:59,753 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1477966634] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:11:59,753 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:11:59,753 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:11:59,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [788856095] [2021-06-05 15:11:59,753 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:11:59,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:11:59,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:11:59,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:11:59,753 INFO L87 Difference]: Start difference. First operand 3914 states and 16422 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:00,488 INFO L93 Difference]: Finished difference Result 4462 states and 18578 transitions. [2021-06-05 15:12:00,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:12:00,489 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:00,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:00,497 INFO L225 Difference]: With dead ends: 4462 [2021-06-05 15:12:00,497 INFO L226 Difference]: Without dead ends: 4440 [2021-06-05 15:12:00,497 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 474.3ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:00,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4440 states. [2021-06-05 15:12:00,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4440 to 3922. [2021-06-05 15:12:00,545 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,553 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 15:12:00,554 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 15:12:00,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:00,554 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 15:12:00,554 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:00,554 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 15:12:00,559 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:00,559 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:00,559 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:00,759 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 480 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1049 [2021-06-05 15:12:00,760 INFO L430 AbstractCegarLoop]: === Iteration 481 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:00,760 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:00,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1081913765, now seen corresponding path program 326 times [2021-06-05 15:12:00,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:00,760 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906180593] [2021-06-05 15:12:00,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:00,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:00,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:00,855 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906180593] [2021-06-05 15:12:00,855 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906180593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:00,855 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1322369541] [2021-06-05 15:12:00,855 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 481 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:00,877 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:00,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:00,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:00,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:00,953 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:00,953 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:00,954 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:00,962 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:00,962 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:00,962 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:01,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:01,040 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1322369541] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:01,040 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:01,040 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:01,040 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191534961] [2021-06-05 15:12:01,040 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:01,040 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:01,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:01,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:01,041 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:01,689 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:01,689 INFO L93 Difference]: Finished difference Result 4365 states and 18169 transitions. [2021-06-05 15:12:01,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:12:01,690 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:01,690 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:01,697 INFO L225 Difference]: With dead ends: 4365 [2021-06-05 15:12:01,697 INFO L226 Difference]: Without dead ends: 4339 [2021-06-05 15:12:01,697 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 518.2ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:12:01,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4339 states. [2021-06-05 15:12:01,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4339 to 3926. [2021-06-05 15:12:01,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196687898089172) internal successors, (16472), 3925 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16472 transitions. [2021-06-05 15:12:01,749 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16472 transitions. Word has length 23 [2021-06-05 15:12:01,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:01,749 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16472 transitions. [2021-06-05 15:12:01,749 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:01,749 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16472 transitions. [2021-06-05 15:12:01,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:01,754 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:01,754 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:01,954 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1051,481 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:01,954 INFO L430 AbstractCegarLoop]: === Iteration 482 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:01,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:01,955 INFO L82 PathProgramCache]: Analyzing trace with hash 531652969, now seen corresponding path program 327 times [2021-06-05 15:12:01,955 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:01,955 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646359007] [2021-06-05 15:12:01,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:02,042 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:02,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646359007] [2021-06-05 15:12:02,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [646359007] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:02,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617034415] [2021-06-05 15:12:02,043 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 482 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:02,065 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:02,066 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:02,066 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:02,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:02,140 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:02,141 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:02,142 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:02,149 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:02,150 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:02,150 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:02,225 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:02,226 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617034415] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:02,226 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:02,226 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:02,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2026663664] [2021-06-05 15:12:02,226 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:02,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:02,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:02,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:02,226 INFO L87 Difference]: Start difference. First operand 3926 states and 16472 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:02,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:02,942 INFO L93 Difference]: Finished difference Result 4337 states and 18068 transitions. [2021-06-05 15:12:02,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:12:02,942 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:02,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:02,949 INFO L225 Difference]: With dead ends: 4337 [2021-06-05 15:12:02,949 INFO L226 Difference]: Without dead ends: 4316 [2021-06-05 15:12:02,949 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 644.4ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:12:02,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4316 states. [2021-06-05 15:12:02,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4316 to 3918. [2021-06-05 15:12:02,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:03,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 15:12:03,001 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 15:12:03,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:03,001 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 15:12:03,001 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:03,001 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 15:12:03,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:03,006 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:03,006 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:03,206 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1053,482 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:03,207 INFO L430 AbstractCegarLoop]: === Iteration 483 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:03,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:03,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1512810199, now seen corresponding path program 328 times [2021-06-05 15:12:03,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:03,207 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313346361] [2021-06-05 15:12:03,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:03,209 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:03,291 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:03,291 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313346361] [2021-06-05 15:12:03,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313346361] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:03,291 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [80239080] [2021-06-05 15:12:03,291 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 483 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:03,314 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:03,314 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:03,315 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:03,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:03,406 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:03,407 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:03,408 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:03,415 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:03,416 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:03,416 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:03,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:03,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [80239080] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:03,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:03,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:03,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456379227] [2021-06-05 15:12:03,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:03,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:03,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:03,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:03,475 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:04,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:04,001 INFO L93 Difference]: Finished difference Result 4358 states and 18168 transitions. [2021-06-05 15:12:04,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:12:04,001 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:04,001 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:04,009 INFO L225 Difference]: With dead ends: 4358 [2021-06-05 15:12:04,009 INFO L226 Difference]: Without dead ends: 4335 [2021-06-05 15:12:04,009 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 376.8ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:12:04,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4335 states. [2021-06-05 15:12:04,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4335 to 3918. [2021-06-05 15:12:04,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:04,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 15:12:04,061 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 15:12:04,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:04,062 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 15:12:04,062 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:04,062 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 15:12:04,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:04,091 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:04,091 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:04,292 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1055,483 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:04,292 INFO L430 AbstractCegarLoop]: === Iteration 484 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:04,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:04,292 INFO L82 PathProgramCache]: Analyzing trace with hash -48961385, now seen corresponding path program 329 times [2021-06-05 15:12:04,292 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:04,292 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [695503859] [2021-06-05 15:12:04,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:04,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:04,375 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:04,375 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [695503859] [2021-06-05 15:12:04,375 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [695503859] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:04,375 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532810916] [2021-06-05 15:12:04,375 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 484 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:04,399 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:04,399 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:04,399 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:04,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:04,492 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:04,493 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:04,494 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:04,501 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:04,502 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:04,502 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:04,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:04,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532810916] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:04,560 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:04,560 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:04,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729220241] [2021-06-05 15:12:04,560 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:04,560 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:04,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:04,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:04,560 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:05,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:05,122 INFO L93 Difference]: Finished difference Result 4355 states and 18155 transitions. [2021-06-05 15:12:05,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:12:05,123 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:05,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:05,130 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 15:12:05,130 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 15:12:05,130 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 484.4ms TimeCoverageRelationStatistics Valid=150, Invalid=720, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:12:05,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 15:12:05,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3922. [2021-06-05 15:12:05,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 15:12:05,182 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 15:12:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:05,183 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 15:12:05,183 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:05,183 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 15:12:05,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:05,188 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:05,188 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:05,388 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 484 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1057 [2021-06-05 15:12:05,388 INFO L430 AbstractCegarLoop]: === Iteration 485 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:05,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:05,388 INFO L82 PathProgramCache]: Analyzing trace with hash 464565467, now seen corresponding path program 330 times [2021-06-05 15:12:05,388 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:05,388 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113590312] [2021-06-05 15:12:05,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:05,472 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:05,473 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:05,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113590312] [2021-06-05 15:12:05,473 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113590312] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:05,473 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442396498] [2021-06-05 15:12:05,473 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 485 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:05,497 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:05,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:05,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:05,498 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:05,575 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:05,575 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:05,576 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:05,584 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:05,584 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:05,584 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:05,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:05,660 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442396498] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:05,660 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:05,660 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:05,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [905783893] [2021-06-05 15:12:05,660 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:05,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:05,660 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:05,660 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:05,660 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:06,091 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:06,091 INFO L93 Difference]: Finished difference Result 4276 states and 17818 transitions. [2021-06-05 15:12:06,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:12:06,091 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:06,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:06,099 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 15:12:06,099 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 15:12:06,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 366.3ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:12:06,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 15:12:06,138 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3926. [2021-06-05 15:12:06,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196687898089172) internal successors, (16472), 3925 states have internal predecessors, (16472), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:06,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16472 transitions. [2021-06-05 15:12:06,149 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16472 transitions. Word has length 23 [2021-06-05 15:12:06,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:06,149 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16472 transitions. [2021-06-05 15:12:06,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:06,149 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16472 transitions. [2021-06-05 15:12:06,154 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:06,154 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:06,155 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:06,355 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1059,485 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:06,355 INFO L430 AbstractCegarLoop]: === Iteration 486 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:06,355 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:06,355 INFO L82 PathProgramCache]: Analyzing trace with hash 1540276623, now seen corresponding path program 331 times [2021-06-05 15:12:06,355 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:06,355 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2006497839] [2021-06-05 15:12:06,355 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:06,357 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:06,442 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:06,442 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:06,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2006497839] [2021-06-05 15:12:06,442 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2006497839] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:06,442 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [856400456] [2021-06-05 15:12:06,442 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 486 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:06,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:06,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:06,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:06,543 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:06,544 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:06,545 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:06,552 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:06,553 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:06,553 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:06,629 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:06,629 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [856400456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:06,629 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:06,629 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:06,629 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197581710] [2021-06-05 15:12:06,629 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:06,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:06,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:06,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:06,629 INFO L87 Difference]: Start difference. First operand 3926 states and 16472 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:07,343 INFO L93 Difference]: Finished difference Result 4270 states and 17805 transitions. [2021-06-05 15:12:07,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:12:07,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:07,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:07,351 INFO L225 Difference]: With dead ends: 4270 [2021-06-05 15:12:07,351 INFO L226 Difference]: Without dead ends: 4249 [2021-06-05 15:12:07,351 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 636.3ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:07,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4249 states. [2021-06-05 15:12:07,392 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4249 to 3918. [2021-06-05 15:12:07,395 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196579014551953) internal successors, (16438), 3917 states have internal predecessors, (16438), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16438 transitions. [2021-06-05 15:12:07,404 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16438 transitions. Word has length 23 [2021-06-05 15:12:07,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:07,404 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16438 transitions. [2021-06-05 15:12:07,404 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:07,404 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16438 transitions. [2021-06-05 15:12:07,409 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:07,409 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:07,409 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:07,610 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1061,486 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:07,610 INFO L430 AbstractCegarLoop]: === Iteration 487 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:07,610 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:07,610 INFO L82 PathProgramCache]: Analyzing trace with hash 1821272475, now seen corresponding path program 332 times [2021-06-05 15:12:07,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:07,610 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501002507] [2021-06-05 15:12:07,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:07,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:07,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:07,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501002507] [2021-06-05 15:12:07,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501002507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:07,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132999805] [2021-06-05 15:12:07,711 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 487 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:07,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:07,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:07,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:07,803 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:07,803 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:07,804 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:07,813 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:07,813 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:07,813 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:07,913 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:07,913 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132999805] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:07,913 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:07,913 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:07,913 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437021631] [2021-06-05 15:12:07,913 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:07,913 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:07,913 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:07,913 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:07,913 INFO L87 Difference]: Start difference. First operand 3918 states and 16438 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:08,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:08,270 INFO L93 Difference]: Finished difference Result 4104 states and 17136 transitions. [2021-06-05 15:12:08,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:08,271 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:08,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:08,278 INFO L225 Difference]: With dead ends: 4104 [2021-06-05 15:12:08,278 INFO L226 Difference]: Without dead ends: 4078 [2021-06-05 15:12:08,278 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 375.6ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:08,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4078 states. [2021-06-05 15:12:08,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4078 to 3927. [2021-06-05 15:12:08,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 4.195109526235354) internal successors, (16470), 3926 states have internal predecessors, (16470), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:08,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 16470 transitions. [2021-06-05 15:12:08,329 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 16470 transitions. Word has length 23 [2021-06-05 15:12:08,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:08,329 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 16470 transitions. [2021-06-05 15:12:08,330 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:08,330 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 16470 transitions. [2021-06-05 15:12:08,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:08,335 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:08,335 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:08,535 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1063,487 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:08,535 INFO L430 AbstractCegarLoop]: === Iteration 488 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:08,535 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:08,535 INFO L82 PathProgramCache]: Analyzing trace with hash 779696407, now seen corresponding path program 333 times [2021-06-05 15:12:08,535 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:08,536 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1107660729] [2021-06-05 15:12:08,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:08,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:08,626 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:08,626 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:08,626 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1107660729] [2021-06-05 15:12:08,626 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1107660729] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:08,627 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1204869391] [2021-06-05 15:12:08,627 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 488 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:08,650 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:08,650 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:08,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:08,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:08,717 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:08,717 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:08,718 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:08,727 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:08,727 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:08,727 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:08,823 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1204869391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:08,823 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:08,823 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:08,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395387331] [2021-06-05 15:12:08,823 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:08,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:08,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:08,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:08,823 INFO L87 Difference]: Start difference. First operand 3927 states and 16470 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:09,171 INFO L93 Difference]: Finished difference Result 4170 states and 17395 transitions. [2021-06-05 15:12:09,171 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:12:09,171 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:09,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:09,178 INFO L225 Difference]: With dead ends: 4170 [2021-06-05 15:12:09,179 INFO L226 Difference]: Without dead ends: 4142 [2021-06-05 15:12:09,179 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 327.5ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:09,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4142 states. [2021-06-05 15:12:09,217 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4142 to 3920. [2021-06-05 15:12:09,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196478693544272) internal successors, (16446), 3919 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16446 transitions. [2021-06-05 15:12:09,259 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16446 transitions. Word has length 23 [2021-06-05 15:12:09,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:09,259 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16446 transitions. [2021-06-05 15:12:09,259 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:09,259 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16446 transitions. [2021-06-05 15:12:09,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:09,265 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:09,265 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:09,466 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1065,488 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:09,466 INFO L430 AbstractCegarLoop]: === Iteration 489 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:09,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:09,466 INFO L82 PathProgramCache]: Analyzing trace with hash 492575055, now seen corresponding path program 334 times [2021-06-05 15:12:09,466 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:09,466 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449572242] [2021-06-05 15:12:09,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:09,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:09,560 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:09,560 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449572242] [2021-06-05 15:12:09,560 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449572242] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:09,560 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [529994027] [2021-06-05 15:12:09,560 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 489 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:09,583 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:09,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:09,584 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:09,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:09,653 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:09,653 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:09,654 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:09,665 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:09,666 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:09,666 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:09,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:09,766 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [529994027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:09,766 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:09,766 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:09,766 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604710127] [2021-06-05 15:12:09,766 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:09,766 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:09,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:09,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:09,767 INFO L87 Difference]: Start difference. First operand 3920 states and 16446 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:10,191 INFO L93 Difference]: Finished difference Result 4150 states and 17314 transitions. [2021-06-05 15:12:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:12:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:10,199 INFO L225 Difference]: With dead ends: 4150 [2021-06-05 15:12:10,199 INFO L226 Difference]: Without dead ends: 4124 [2021-06-05 15:12:10,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 463.0ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:10,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4124 states. [2021-06-05 15:12:10,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4124 to 3924. [2021-06-05 15:12:10,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:10,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 15:12:10,249 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 15:12:10,249 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:10,249 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 15:12:10,249 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:10,249 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 15:12:10,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:10,254 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:10,254 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:10,455 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 489 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1067 [2021-06-05 15:12:10,455 INFO L430 AbstractCegarLoop]: === Iteration 490 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:10,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:10,455 INFO L82 PathProgramCache]: Analyzing trace with hash -642331, now seen corresponding path program 335 times [2021-06-05 15:12:10,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:10,455 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934842809] [2021-06-05 15:12:10,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:10,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:10,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:10,549 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934842809] [2021-06-05 15:12:10,549 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934842809] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:10,549 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [528359196] [2021-06-05 15:12:10,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 490 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:10,571 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:10,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:10,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:10,639 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:10,640 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:10,641 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:10,649 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:10,650 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:10,650 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:10,744 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:10,745 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [528359196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:10,745 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:10,745 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:10,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407658273] [2021-06-05 15:12:10,745 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:10,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:10,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:10,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:10,745 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:11,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:11,315 INFO L93 Difference]: Finished difference Result 4180 states and 17445 transitions. [2021-06-05 15:12:11,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:12:11,315 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:11,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:11,322 INFO L225 Difference]: With dead ends: 4180 [2021-06-05 15:12:11,322 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 15:12:11,322 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 577.0ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:12:11,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 15:12:11,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3920. [2021-06-05 15:12:11,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196478693544272) internal successors, (16446), 3919 states have internal predecessors, (16446), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:11,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16446 transitions. [2021-06-05 15:12:11,372 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16446 transitions. Word has length 23 [2021-06-05 15:12:11,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:11,372 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16446 transitions. [2021-06-05 15:12:11,372 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:11,372 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16446 transitions. [2021-06-05 15:12:11,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:11,377 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:11,377 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:11,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 490 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1069 [2021-06-05 15:12:11,577 INFO L430 AbstractCegarLoop]: === Iteration 491 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:11,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:11,578 INFO L82 PathProgramCache]: Analyzing trace with hash 934133925, now seen corresponding path program 336 times [2021-06-05 15:12:11,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:11,578 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144668158] [2021-06-05 15:12:11,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:11,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:11,667 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:11,667 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:11,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144668158] [2021-06-05 15:12:11,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144668158] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:11,667 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123252065] [2021-06-05 15:12:11,667 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 491 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:11,690 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:11,691 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:11,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:11,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:11,756 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:11,756 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:11,757 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:11,766 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:11,766 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:11,766 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:11,858 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:11,859 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2123252065] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:11,859 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:11,859 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:11,859 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [340250233] [2021-06-05 15:12:11,859 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:11,859 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:11,859 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:11,859 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:11,859 INFO L87 Difference]: Start difference. First operand 3920 states and 16446 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,168 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:12,168 INFO L93 Difference]: Finished difference Result 4191 states and 17481 transitions. [2021-06-05 15:12:12,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:12:12,168 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:12,168 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:12,175 INFO L225 Difference]: With dead ends: 4191 [2021-06-05 15:12:12,175 INFO L226 Difference]: Without dead ends: 4166 [2021-06-05 15:12:12,175 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 320.8ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:12,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4166 states. [2021-06-05 15:12:12,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4166 to 3924. [2021-06-05 15:12:12,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.1962783583991845) internal successors, (16462), 3923 states have internal predecessors, (16462), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,226 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16462 transitions. [2021-06-05 15:12:12,226 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16462 transitions. Word has length 23 [2021-06-05 15:12:12,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:12,226 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16462 transitions. [2021-06-05 15:12:12,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:12,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16462 transitions. [2021-06-05 15:12:12,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:12,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:12,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:12,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1071,491 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:12,432 INFO L430 AbstractCegarLoop]: === Iteration 492 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:12,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:12,432 INFO L82 PathProgramCache]: Analyzing trace with hash -78558607, now seen corresponding path program 337 times [2021-06-05 15:12:12,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:12,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1809371590] [2021-06-05 15:12:12,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:12,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:12,521 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:12,521 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1809371590] [2021-06-05 15:12:12,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1809371590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:12,521 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62473205] [2021-06-05 15:12:12,521 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 492 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:12,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:12,544 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:12,544 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:12,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:12,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:12,612 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:12,621 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:12,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:12,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:12,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:12,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [62473205] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:12,716 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:12,716 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:12,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [376421548] [2021-06-05 15:12:12,717 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:12,717 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:12,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:12,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:12,717 INFO L87 Difference]: Start difference. First operand 3924 states and 16462 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:13,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:13,235 INFO L93 Difference]: Finished difference Result 4183 states and 17457 transitions. [2021-06-05 15:12:13,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:12:13,235 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:13,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:13,242 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 15:12:13,242 INFO L226 Difference]: Without dead ends: 4162 [2021-06-05 15:12:13,242 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 507.4ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:12:13,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4162 states. [2021-06-05 15:12:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4162 to 3916. [2021-06-05 15:12:13,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196424010217114) internal successors, (16429), 3915 states have internal predecessors, (16429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:13,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16429 transitions. [2021-06-05 15:12:13,291 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16429 transitions. Word has length 23 [2021-06-05 15:12:13,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:13,291 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16429 transitions. [2021-06-05 15:12:13,291 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:13,291 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16429 transitions. [2021-06-05 15:12:13,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:13,296 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:13,296 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:13,496 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1073,492 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:13,496 INFO L430 AbstractCegarLoop]: === Iteration 493 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:13,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:13,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1664788197, now seen corresponding path program 338 times [2021-06-05 15:12:13,497 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:13,497 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466623168] [2021-06-05 15:12:13,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:13,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:13,578 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:13,578 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:13,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466623168] [2021-06-05 15:12:13,578 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466623168] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:13,578 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753533872] [2021-06-05 15:12:13,578 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 493 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:13,602 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:13,602 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:13,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:13,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:13,697 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:13,697 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:13,698 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:13,706 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:13,706 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:13,707 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:13,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:13,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [753533872] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:13,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:13,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:13,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437669338] [2021-06-05 15:12:13,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:13,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:13,764 INFO L87 Difference]: Start difference. First operand 3916 states and 16429 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:14,174 INFO L93 Difference]: Finished difference Result 4223 states and 17632 transitions. [2021-06-05 15:12:14,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:12:14,174 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:14,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:14,182 INFO L225 Difference]: With dead ends: 4223 [2021-06-05 15:12:14,182 INFO L226 Difference]: Without dead ends: 4200 [2021-06-05 15:12:14,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 365.2ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:14,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4200 states. [2021-06-05 15:12:14,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4200 to 3912. [2021-06-05 15:12:14,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.196624904116594) internal successors, (16413), 3911 states have internal predecessors, (16413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16413 transitions. [2021-06-05 15:12:14,232 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16413 transitions. Word has length 23 [2021-06-05 15:12:14,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:14,232 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16413 transitions. [2021-06-05 15:12:14,232 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:14,232 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16413 transitions. [2021-06-05 15:12:14,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:14,237 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:14,237 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:14,438 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1075,493 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:14,438 INFO L430 AbstractCegarLoop]: === Iteration 494 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:14,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:14,438 INFO L82 PathProgramCache]: Analyzing trace with hash -1958361947, now seen corresponding path program 339 times [2021-06-05 15:12:14,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:14,438 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [150980789] [2021-06-05 15:12:14,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:14,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:14,544 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:14,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [150980789] [2021-06-05 15:12:14,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [150980789] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:14,544 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [585929927] [2021-06-05 15:12:14,545 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 494 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:14,568 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:12:14,568 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:14,569 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:14,569 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:14,661 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:14,661 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:14,662 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:14,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:14,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:14,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:14,727 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:14,727 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [585929927] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:14,727 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:14,727 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:14,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [999727442] [2021-06-05 15:12:14,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:14,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:14,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:14,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:14,728 INFO L87 Difference]: Start difference. First operand 3912 states and 16413 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:15,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:15,425 INFO L93 Difference]: Finished difference Result 4355 states and 18155 transitions. [2021-06-05 15:12:15,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:12:15,425 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:15,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:15,432 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 15:12:15,432 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 15:12:15,433 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 527.5ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:12:15,437 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 15:12:15,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3920. [2021-06-05 15:12:15,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:15,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 15:12:15,484 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 15:12:15,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:15,485 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 15:12:15,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:15,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 15:12:15,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:15,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:15,490 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:15,690 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 494 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1077 [2021-06-05 15:12:15,690 INFO L430 AbstractCegarLoop]: === Iteration 495 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:15,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:15,690 INFO L82 PathProgramCache]: Analyzing trace with hash -1444835095, now seen corresponding path program 340 times [2021-06-05 15:12:15,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:15,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217663027] [2021-06-05 15:12:15,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:15,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:15,774 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:15,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:15,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217663027] [2021-06-05 15:12:15,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217663027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:15,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825107652] [2021-06-05 15:12:15,774 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 495 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:15,798 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:15,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:15,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:15,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:15,876 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:15,876 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:15,877 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:15,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:15,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:15,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:15,960 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:15,960 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825107652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:15,960 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:15,960 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:15,960 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [192185649] [2021-06-05 15:12:15,960 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:15,960 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:15,960 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:15,960 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:15,961 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:16,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:16,405 INFO L93 Difference]: Finished difference Result 4356 states and 18132 transitions. [2021-06-05 15:12:16,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:12:16,405 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:16,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:16,412 INFO L225 Difference]: With dead ends: 4356 [2021-06-05 15:12:16,413 INFO L226 Difference]: Without dead ends: 4331 [2021-06-05 15:12:16,413 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:12:16,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4331 states. [2021-06-05 15:12:16,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4331 to 3924. [2021-06-05 15:12:16,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:16,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 15:12:16,468 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 15:12:16,468 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:16,468 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 15:12:16,468 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:16,468 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 15:12:16,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:16,473 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:16,473 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:16,674 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 495 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1079 [2021-06-05 15:12:16,674 INFO L430 AbstractCegarLoop]: === Iteration 496 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:16,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:16,674 INFO L82 PathProgramCache]: Analyzing trace with hash -369123939, now seen corresponding path program 341 times [2021-06-05 15:12:16,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:16,674 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380289730] [2021-06-05 15:12:16,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:16,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:16,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:16,758 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380289730] [2021-06-05 15:12:16,758 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380289730] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:16,758 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [513326334] [2021-06-05 15:12:16,758 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 496 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:16,782 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:12:16,782 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:16,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:16,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:16,860 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:16,860 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:16,861 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:16,869 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:16,869 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:16,870 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:16,945 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:16,945 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [513326334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:16,945 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:16,945 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:16,945 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351678541] [2021-06-05 15:12:16,945 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:16,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:16,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:16,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:16,946 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:17,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:17,787 INFO L93 Difference]: Finished difference Result 4295 states and 17905 transitions. [2021-06-05 15:12:17,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:12:17,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:17,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:17,795 INFO L225 Difference]: With dead ends: 4295 [2021-06-05 15:12:17,795 INFO L226 Difference]: Without dead ends: 4274 [2021-06-05 15:12:17,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 263 ImplicationChecksByTransitivity, 743.4ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:12:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4274 states. [2021-06-05 15:12:17,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4274 to 3916. [2021-06-05 15:12:17,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196424010217114) internal successors, (16429), 3915 states have internal predecessors, (16429), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:17,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16429 transitions. [2021-06-05 15:12:17,849 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16429 transitions. Word has length 23 [2021-06-05 15:12:17,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:17,849 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16429 transitions. [2021-06-05 15:12:17,850 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:17,850 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16429 transitions. [2021-06-05 15:12:17,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:17,855 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:17,855 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:18,055 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1081,496 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:18,055 INFO L430 AbstractCegarLoop]: === Iteration 497 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:18,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:18,055 INFO L82 PathProgramCache]: Analyzing trace with hash -198309007, now seen corresponding path program 342 times [2021-06-05 15:12:18,055 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:18,055 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724341031] [2021-06-05 15:12:18,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:18,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:18,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:18,136 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:18,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724341031] [2021-06-05 15:12:18,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724341031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:18,137 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355513605] [2021-06-05 15:12:18,137 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 497 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:18,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:18,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:18,254 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:18,254 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:18,255 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:18,263 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:18,263 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:18,263 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:18,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:18,321 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1355513605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:18,321 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:18,321 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:18,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085705067] [2021-06-05 15:12:18,321 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:18,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:18,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:18,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:18,321 INFO L87 Difference]: Start difference. First operand 3916 states and 16429 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:18,756 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:18,756 INFO L93 Difference]: Finished difference Result 4209 states and 17576 transitions. [2021-06-05 15:12:18,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:12:18,756 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:18,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:18,763 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 15:12:18,763 INFO L226 Difference]: Without dead ends: 4186 [2021-06-05 15:12:18,764 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 363.4ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:18,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4186 states. [2021-06-05 15:12:18,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4186 to 3912. [2021-06-05 15:12:18,806 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.196624904116594) internal successors, (16413), 3911 states have internal predecessors, (16413), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:18,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16413 transitions. [2021-06-05 15:12:18,815 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16413 transitions. Word has length 23 [2021-06-05 15:12:18,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:18,815 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16413 transitions. [2021-06-05 15:12:18,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:18,815 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16413 transitions. [2021-06-05 15:12:18,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:18,820 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:18,820 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:19,020 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 497 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1083 [2021-06-05 15:12:19,020 INFO L430 AbstractCegarLoop]: === Iteration 498 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:19,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:19,021 INFO L82 PathProgramCache]: Analyzing trace with hash 1238319051, now seen corresponding path program 343 times [2021-06-05 15:12:19,021 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:19,021 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496377984] [2021-06-05 15:12:19,021 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:19,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:19,108 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:19,108 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:19,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496377984] [2021-06-05 15:12:19,108 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496377984] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:19,108 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729353633] [2021-06-05 15:12:19,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 498 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:19,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:19,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:19,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:19,223 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:19,223 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:19,224 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:19,232 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:19,232 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:19,232 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:19,290 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:19,291 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [729353633] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:19,291 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:19,291 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:19,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991393656] [2021-06-05 15:12:19,291 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:19,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:19,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:19,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:19,291 INFO L87 Difference]: Start difference. First operand 3912 states and 16413 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:20,044 INFO L93 Difference]: Finished difference Result 4354 states and 18146 transitions. [2021-06-05 15:12:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:12:20,044 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:20,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:20,052 INFO L225 Difference]: With dead ends: 4354 [2021-06-05 15:12:20,052 INFO L226 Difference]: Without dead ends: 4332 [2021-06-05 15:12:20,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 548.0ms TimeCoverageRelationStatistics Valid=155, Invalid=775, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:20,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4332 states. [2021-06-05 15:12:20,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4332 to 3918. [2021-06-05 15:12:20,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.197089609394945) internal successors, (16440), 3917 states have internal predecessors, (16440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16440 transitions. [2021-06-05 15:12:20,106 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16440 transitions. Word has length 23 [2021-06-05 15:12:20,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:20,106 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16440 transitions. [2021-06-05 15:12:20,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16440 transitions. [2021-06-05 15:12:20,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:20,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:20,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:20,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1085,498 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:20,311 INFO L430 AbstractCegarLoop]: === Iteration 499 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:20,311 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:20,311 INFO L82 PathProgramCache]: Analyzing trace with hash 1823653003, now seen corresponding path program 344 times [2021-06-05 15:12:20,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:20,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1022103794] [2021-06-05 15:12:20,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:20,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:20,398 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:20,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1022103794] [2021-06-05 15:12:20,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1022103794] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:20,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1654432691] [2021-06-05 15:12:20,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 499 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:20,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:20,422 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:20,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:20,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:20,496 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:20,497 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:20,498 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:20,505 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:20,506 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:20,506 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:20,580 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:20,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1654432691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:20,581 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:20,581 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:20,581 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2013002378] [2021-06-05 15:12:20,581 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:20,581 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:20,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:20,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:20,581 INFO L87 Difference]: Start difference. First operand 3918 states and 16440 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:20,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:20,958 INFO L93 Difference]: Finished difference Result 4269 states and 17784 transitions. [2021-06-05 15:12:20,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:12:20,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:20,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:20,965 INFO L225 Difference]: With dead ends: 4269 [2021-06-05 15:12:20,965 INFO L226 Difference]: Without dead ends: 4243 [2021-06-05 15:12:20,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 367.7ms TimeCoverageRelationStatistics Valid=127, Invalid=575, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:12:20,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4243 states. [2021-06-05 15:12:21,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4243 to 3922. [2021-06-05 15:12:21,007 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.196888548839582) internal successors, (16456), 3921 states have internal predecessors, (16456), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:21,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16456 transitions. [2021-06-05 15:12:21,015 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16456 transitions. Word has length 23 [2021-06-05 15:12:21,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:21,015 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16456 transitions. [2021-06-05 15:12:21,015 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:21,015 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16456 transitions. [2021-06-05 15:12:21,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:21,020 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:21,020 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:21,220 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1087,499 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:21,220 INFO L430 AbstractCegarLoop]: === Iteration 500 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:21,221 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:21,221 INFO L82 PathProgramCache]: Analyzing trace with hash -857747559, now seen corresponding path program 345 times [2021-06-05 15:12:21,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:21,221 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729420517] [2021-06-05 15:12:21,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:21,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:21,314 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:21,314 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729420517] [2021-06-05 15:12:21,314 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729420517] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:21,314 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37333316] [2021-06-05 15:12:21,314 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 500 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:21,338 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:12:21,338 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:21,338 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:21,339 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:21,413 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:21,413 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:21,414 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:21,422 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:21,422 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:21,422 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:21,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:21,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37333316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:21,523 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:21,523 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:21,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [765827952] [2021-06-05 15:12:21,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:21,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:21,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:21,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:21,524 INFO L87 Difference]: Start difference. First operand 3922 states and 16456 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:22,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:22,275 INFO L93 Difference]: Finished difference Result 4276 states and 17820 transitions. [2021-06-05 15:12:22,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:12:22,275 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:22,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:22,302 INFO L225 Difference]: With dead ends: 4276 [2021-06-05 15:12:22,303 INFO L226 Difference]: Without dead ends: 4255 [2021-06-05 15:12:22,303 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 691.8ms TimeCoverageRelationStatistics Valid=186, Invalid=806, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:12:22,306 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4255 states. [2021-06-05 15:12:22,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4255 to 3914. [2021-06-05 15:12:22,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3914 states, 3913 states have (on average 4.196779964221824) internal successors, (16422), 3913 states have internal predecessors, (16422), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:22,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3914 states to 3914 states and 16422 transitions. [2021-06-05 15:12:22,353 INFO L78 Accepts]: Start accepts. Automaton has 3914 states and 16422 transitions. Word has length 23 [2021-06-05 15:12:22,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:22,353 INFO L482 AbstractCegarLoop]: Abstraction has 3914 states and 16422 transitions. [2021-06-05 15:12:22,353 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:22,353 INFO L276 IsEmpty]: Start isEmpty. Operand 3914 states and 16422 transitions. [2021-06-05 15:12:22,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:22,358 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:22,359 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:22,559 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 500 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1089 [2021-06-05 15:12:22,559 INFO L430 AbstractCegarLoop]: === Iteration 501 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:22,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:22,559 INFO L82 PathProgramCache]: Analyzing trace with hash 1011097671, now seen corresponding path program 346 times [2021-06-05 15:12:22,559 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:22,559 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116570599] [2021-06-05 15:12:22,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:22,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:22,646 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:22,646 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116570599] [2021-06-05 15:12:22,646 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116570599] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:22,646 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [748968932] [2021-06-05 15:12:22,646 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 501 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:22,669 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:22,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:22,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:22,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:22,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:22,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:22,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:22,769 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:22,769 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:22,769 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:22,826 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:22,827 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [748968932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:22,827 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:22,827 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:22,827 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1439617625] [2021-06-05 15:12:22,827 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:22,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:22,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:22,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:22,827 INFO L87 Difference]: Start difference. First operand 3914 states and 16422 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:23,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:23,565 INFO L93 Difference]: Finished difference Result 4385 states and 18270 transitions. [2021-06-05 15:12:23,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:12:23,565 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:23,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:23,572 INFO L225 Difference]: With dead ends: 4385 [2021-06-05 15:12:23,573 INFO L226 Difference]: Without dead ends: 4363 [2021-06-05 15:12:23,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 519.6ms TimeCoverageRelationStatistics Valid=154, Invalid=776, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:23,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4363 states. [2021-06-05 15:12:23,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4363 to 3922. [2021-06-05 15:12:23,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3922 states, 3921 states have (on average 4.197143585819944) internal successors, (16457), 3921 states have internal predecessors, (16457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3922 states to 3922 states and 16457 transitions. [2021-06-05 15:12:23,626 INFO L78 Accepts]: Start accepts. Automaton has 3922 states and 16457 transitions. Word has length 23 [2021-06-05 15:12:23,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:23,626 INFO L482 AbstractCegarLoop]: Abstraction has 3922 states and 16457 transitions. [2021-06-05 15:12:23,626 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:23,626 INFO L276 IsEmpty]: Start isEmpty. Operand 3922 states and 16457 transitions. [2021-06-05 15:12:23,631 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:23,631 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:23,631 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:23,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1091,501 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:23,832 INFO L430 AbstractCegarLoop]: === Iteration 502 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:23,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:23,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1524624523, now seen corresponding path program 347 times [2021-06-05 15:12:23,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:23,832 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888733027] [2021-06-05 15:12:23,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:23,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:23,923 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:23,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:23,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888733027] [2021-06-05 15:12:23,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [888733027] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:23,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992046389] [2021-06-05 15:12:23,924 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 502 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:23,947 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:23,947 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:23,948 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:23,948 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:24,024 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:24,024 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:24,025 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:24,032 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:24,033 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:24,033 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:24,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:24,109 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1992046389] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:24,109 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:24,109 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:24,109 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160602402] [2021-06-05 15:12:24,109 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:24,110 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:24,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:24,110 INFO L87 Difference]: Start difference. First operand 3922 states and 16457 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:24,662 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:24,663 INFO L93 Difference]: Finished difference Result 4297 states and 17896 transitions. [2021-06-05 15:12:24,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:12:24,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:24,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:24,670 INFO L225 Difference]: With dead ends: 4297 [2021-06-05 15:12:24,670 INFO L226 Difference]: Without dead ends: 4272 [2021-06-05 15:12:24,671 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 513.3ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:12:24,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4272 states. [2021-06-05 15:12:24,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4272 to 3926. [2021-06-05 15:12:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3926 states, 3925 states have (on average 4.196942675159236) internal successors, (16473), 3925 states have internal predecessors, (16473), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:24,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3926 states to 3926 states and 16473 transitions. [2021-06-05 15:12:24,721 INFO L78 Accepts]: Start accepts. Automaton has 3926 states and 16473 transitions. Word has length 23 [2021-06-05 15:12:24,721 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:24,721 INFO L482 AbstractCegarLoop]: Abstraction has 3926 states and 16473 transitions. [2021-06-05 15:12:24,721 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:24,721 INFO L276 IsEmpty]: Start isEmpty. Operand 3926 states and 16473 transitions. [2021-06-05 15:12:24,727 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:24,727 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:24,727 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:24,927 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 502 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1093 [2021-06-05 15:12:24,927 INFO L430 AbstractCegarLoop]: === Iteration 503 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:24,928 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:24,928 INFO L82 PathProgramCache]: Analyzing trace with hash -1694631617, now seen corresponding path program 348 times [2021-06-05 15:12:24,951 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:24,951 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226089885] [2021-06-05 15:12:24,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:24,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:25,043 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:25,043 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226089885] [2021-06-05 15:12:25,043 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226089885] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:25,043 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1478490115] [2021-06-05 15:12:25,044 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 503 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:25,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:12:25,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:25,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:25,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:25,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:25,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:25,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:25,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:25,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:25,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:25,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:25,231 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1478490115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:25,231 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:25,231 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:25,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086496807] [2021-06-05 15:12:25,231 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:25,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:25,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:25,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:25,232 INFO L87 Difference]: Start difference. First operand 3926 states and 16473 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:26,038 INFO L93 Difference]: Finished difference Result 4307 states and 17947 transitions. [2021-06-05 15:12:26,038 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:12:26,038 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:26,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:26,046 INFO L225 Difference]: With dead ends: 4307 [2021-06-05 15:12:26,046 INFO L226 Difference]: Without dead ends: 4286 [2021-06-05 15:12:26,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 695.8ms TimeCoverageRelationStatistics Valid=189, Invalid=867, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:12:26,050 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4286 states. [2021-06-05 15:12:26,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4286 to 3918. [2021-06-05 15:12:26,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3918 states, 3917 states have (on average 4.196834311973449) internal successors, (16439), 3917 states have internal predecessors, (16439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,097 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3918 states to 3918 states and 16439 transitions. [2021-06-05 15:12:26,097 INFO L78 Accepts]: Start accepts. Automaton has 3918 states and 16439 transitions. Word has length 23 [2021-06-05 15:12:26,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:26,097 INFO L482 AbstractCegarLoop]: Abstraction has 3918 states and 16439 transitions. [2021-06-05 15:12:26,097 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,097 INFO L276 IsEmpty]: Start isEmpty. Operand 3918 states and 16439 transitions. [2021-06-05 15:12:26,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:26,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:26,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:26,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1095,503 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:26,302 INFO L430 AbstractCegarLoop]: === Iteration 504 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:26,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:26,303 INFO L82 PathProgramCache]: Analyzing trace with hash -1413635765, now seen corresponding path program 349 times [2021-06-05 15:12:26,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:26,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179523701] [2021-06-05 15:12:26,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:26,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:26,397 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:26,398 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:26,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179523701] [2021-06-05 15:12:26,398 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179523701] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:26,398 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1540290253] [2021-06-05 15:12:26,398 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 504 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:26,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:26,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:26,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:26,485 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:26,485 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:26,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:26,494 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:26,495 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:26,495 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:26,592 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:26,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1540290253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:26,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:26,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:26,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641361193] [2021-06-05 15:12:26,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:26,593 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:26,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:26,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:26,593 INFO L87 Difference]: Start difference. First operand 3918 states and 16439 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:26,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:26,983 INFO L93 Difference]: Finished difference Result 4176 states and 17415 transitions. [2021-06-05 15:12:26,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:26,983 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:26,984 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:26,991 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 15:12:26,992 INFO L226 Difference]: Without dead ends: 4150 [2021-06-05 15:12:26,992 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 334.3ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:26,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4150 states. [2021-06-05 15:12:27,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4150 to 3927. [2021-06-05 15:12:27,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3927 states, 3926 states have (on average 4.195364238410596) internal successors, (16471), 3926 states have internal predecessors, (16471), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3927 states to 3927 states and 16471 transitions. [2021-06-05 15:12:27,045 INFO L78 Accepts]: Start accepts. Automaton has 3927 states and 16471 transitions. Word has length 23 [2021-06-05 15:12:27,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:27,045 INFO L482 AbstractCegarLoop]: Abstraction has 3927 states and 16471 transitions. [2021-06-05 15:12:27,045 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,045 INFO L276 IsEmpty]: Start isEmpty. Operand 3927 states and 16471 transitions. [2021-06-05 15:12:27,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:27,050 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:27,050 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:27,250 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1097,504 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:27,250 INFO L430 AbstractCegarLoop]: === Iteration 505 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:27,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:27,251 INFO L82 PathProgramCache]: Analyzing trace with hash 1839755463, now seen corresponding path program 350 times [2021-06-05 15:12:27,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:27,251 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440242254] [2021-06-05 15:12:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:27,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:27,346 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:27,346 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:27,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440242254] [2021-06-05 15:12:27,346 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440242254] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:27,346 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36253945] [2021-06-05 15:12:27,346 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 505 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:27,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:27,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:27,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:27,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:27,434 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:27,434 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:27,435 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:27,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:27,444 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:27,444 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:27,568 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [36253945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:27,568 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:27,568 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:27,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1301157371] [2021-06-05 15:12:27,568 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:27,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:27,568 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:27,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:27,569 INFO L87 Difference]: Start difference. First operand 3927 states and 16471 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:27,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:27,974 INFO L93 Difference]: Finished difference Result 4175 states and 17410 transitions. [2021-06-05 15:12:27,974 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:27,974 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:27,974 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:27,981 INFO L225 Difference]: With dead ends: 4175 [2021-06-05 15:12:27,981 INFO L226 Difference]: Without dead ends: 4147 [2021-06-05 15:12:27,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 387.3ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:27,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4147 states. [2021-06-05 15:12:28,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4147 to 3920. [2021-06-05 15:12:28,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:28,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 15:12:28,031 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 15:12:28,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:28,031 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 15:12:28,031 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:28,031 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 15:12:28,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:28,036 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:28,036 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:28,237 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 505 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1099 [2021-06-05 15:12:28,237 INFO L430 AbstractCegarLoop]: === Iteration 506 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:28,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:28,237 INFO L82 PathProgramCache]: Analyzing trace with hash 1552634111, now seen corresponding path program 351 times [2021-06-05 15:12:28,237 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:28,237 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667641112] [2021-06-05 15:12:28,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:28,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:28,330 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:28,330 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667641112] [2021-06-05 15:12:28,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [667641112] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:28,330 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [258155355] [2021-06-05 15:12:28,330 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 506 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:28,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:28,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:28,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:12:28,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:28,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:28,419 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:12:28,420 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:28,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:28,428 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:28,428 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:26 [2021-06-05 15:12:28,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:28,504 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [258155355] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:28,504 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:28,504 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:28,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906267132] [2021-06-05 15:12:28,504 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:28,504 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:28,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:28,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:28,505 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:28,849 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:28,849 INFO L93 Difference]: Finished difference Result 4195 states and 17490 transitions. [2021-06-05 15:12:28,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:28,849 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:28,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:28,856 INFO L225 Difference]: With dead ends: 4195 [2021-06-05 15:12:28,856 INFO L226 Difference]: Without dead ends: 4169 [2021-06-05 15:12:28,857 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 262.5ms TimeCoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2021-06-05 15:12:28,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4169 states. [2021-06-05 15:12:28,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4169 to 3924. [2021-06-05 15:12:28,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:28,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 15:12:28,907 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 15:12:28,907 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:28,907 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 15:12:28,907 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:28,907 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 15:12:28,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:28,912 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:28,912 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:29,112 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 506 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1101 [2021-06-05 15:12:29,112 INFO L430 AbstractCegarLoop]: === Iteration 507 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:29,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:29,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1059416725, now seen corresponding path program 352 times [2021-06-05 15:12:29,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:29,113 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [4746376] [2021-06-05 15:12:29,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:29,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:29,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:29,207 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [4746376] [2021-06-05 15:12:29,207 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [4746376] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:29,207 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273818848] [2021-06-05 15:12:29,207 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 507 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:29,263 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:29,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:29,264 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:29,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:29,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:29,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:29,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:29,337 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:29,338 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:29,338 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:29,438 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273818848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:29,438 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:29,438 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:29,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740859445] [2021-06-05 15:12:29,438 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:29,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:29,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:29,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:29,439 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:30,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:30,111 INFO L93 Difference]: Finished difference Result 4209 states and 17554 transitions. [2021-06-05 15:12:30,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:12:30,111 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:30,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:30,118 INFO L225 Difference]: With dead ends: 4209 [2021-06-05 15:12:30,118 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 15:12:30,118 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 573.1ms TimeCoverageRelationStatistics Valid=156, Invalid=656, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:12:30,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 15:12:30,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3920. [2021-06-05 15:12:30,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196733860678744) internal successors, (16447), 3919 states have internal predecessors, (16447), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:30,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16447 transitions. [2021-06-05 15:12:30,167 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16447 transitions. Word has length 23 [2021-06-05 15:12:30,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:30,167 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16447 transitions. [2021-06-05 15:12:30,167 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:30,167 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16447 transitions. [2021-06-05 15:12:30,172 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:30,172 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:30,172 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:30,372 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 507 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1102 [2021-06-05 15:12:30,373 INFO L430 AbstractCegarLoop]: === Iteration 508 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:30,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:30,373 INFO L82 PathProgramCache]: Analyzing trace with hash 1994192981, now seen corresponding path program 353 times [2021-06-05 15:12:30,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:30,373 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762823630] [2021-06-05 15:12:30,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:30,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:30,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:30,470 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:30,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762823630] [2021-06-05 15:12:30,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1762823630] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:30,470 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704592239] [2021-06-05 15:12:30,470 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 508 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:30,493 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:12:30,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:30,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:30,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:30,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:30,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:30,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:30,567 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:30,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:30,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:30,664 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:30,664 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704592239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:30,664 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:30,664 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:30,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [996662550] [2021-06-05 15:12:30,664 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:30,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:30,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:30,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:30,665 INFO L87 Difference]: Start difference. First operand 3920 states and 16447 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:31,139 INFO L93 Difference]: Finished difference Result 4246 states and 17695 transitions. [2021-06-05 15:12:31,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:12:31,139 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:31,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:31,146 INFO L225 Difference]: With dead ends: 4246 [2021-06-05 15:12:31,146 INFO L226 Difference]: Without dead ends: 4221 [2021-06-05 15:12:31,146 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 459.1ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:31,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4221 states. [2021-06-05 15:12:31,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4221 to 3924. [2021-06-05 15:12:31,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196533265358144) internal successors, (16463), 3923 states have internal predecessors, (16463), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16463 transitions. [2021-06-05 15:12:31,195 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16463 transitions. Word has length 23 [2021-06-05 15:12:31,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:31,195 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16463 transitions. [2021-06-05 15:12:31,196 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:31,196 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16463 transitions. [2021-06-05 15:12:31,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:31,200 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:31,201 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:31,401 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1104,508 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:31,401 INFO L430 AbstractCegarLoop]: === Iteration 509 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:31,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:31,401 INFO L82 PathProgramCache]: Analyzing trace with hash 981500449, now seen corresponding path program 354 times [2021-06-05 15:12:31,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:31,401 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1275021710] [2021-06-05 15:12:31,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:31,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:31,498 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:31,499 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:31,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1275021710] [2021-06-05 15:12:31,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1275021710] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:31,499 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [672516978] [2021-06-05 15:12:31,499 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 509 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:31,522 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:31,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:31,523 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:31,523 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:31,594 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:31,596 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:31,607 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:31,607 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:12:31,608 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:31,622 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:31,623 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:31,623 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:48 [2021-06-05 15:12:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:31,719 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [672516978] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:31,720 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:31,720 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:12:31,720 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [25835238] [2021-06-05 15:12:31,720 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:31,720 INFO L87 Difference]: Start difference. First operand 3924 states and 16463 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:32,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:32,410 INFO L93 Difference]: Finished difference Result 4236 states and 17665 transitions. [2021-06-05 15:12:32,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:12:32,411 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:32,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:32,418 INFO L225 Difference]: With dead ends: 4236 [2021-06-05 15:12:32,418 INFO L226 Difference]: Without dead ends: 4215 [2021-06-05 15:12:32,418 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 567.1ms TimeCoverageRelationStatistics Valid=146, Invalid=976, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:12:32,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4215 states. [2021-06-05 15:12:32,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4215 to 3916. [2021-06-05 15:12:32,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:32,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 15:12:32,493 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 15:12:32,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:32,493 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 15:12:32,493 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:32,493 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 15:12:32,498 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:32,498 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:32,498 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:32,699 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 509 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1106 [2021-06-05 15:12:32,699 INFO L430 AbstractCegarLoop]: === Iteration 510 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:32,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:32,699 INFO L82 PathProgramCache]: Analyzing trace with hash 162475199, now seen corresponding path program 355 times [2021-06-05 15:12:32,699 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:32,699 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574355782] [2021-06-05 15:12:32,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:32,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:32,786 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:32,786 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574355782] [2021-06-05 15:12:32,786 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1574355782] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:32,786 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987912053] [2021-06-05 15:12:32,786 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 510 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:32,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:32,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:32,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:32,895 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:32,895 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:32,896 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:32,904 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:32,904 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:32,904 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:32,961 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:32,961 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987912053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:32,961 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:32,961 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:32,961 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448160811] [2021-06-05 15:12:32,961 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:32,961 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:32,961 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:32,961 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:32,961 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:33,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:33,702 INFO L93 Difference]: Finished difference Result 4751 states and 19722 transitions. [2021-06-05 15:12:33,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:12:33,702 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:33,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:33,710 INFO L225 Difference]: With dead ends: 4751 [2021-06-05 15:12:33,710 INFO L226 Difference]: Without dead ends: 4729 [2021-06-05 15:12:33,710 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 606.9ms TimeCoverageRelationStatistics Valid=200, Invalid=922, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:12:33,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4729 states. [2021-06-05 15:12:33,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4729 to 3920. [2021-06-05 15:12:33,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.196989027813218) internal successors, (16448), 3919 states have internal predecessors, (16448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:33,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16448 transitions. [2021-06-05 15:12:33,764 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16448 transitions. Word has length 23 [2021-06-05 15:12:33,764 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:33,764 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16448 transitions. [2021-06-05 15:12:33,764 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:33,764 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16448 transitions. [2021-06-05 15:12:33,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:33,769 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:33,769 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:33,970 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 510 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1110 [2021-06-05 15:12:33,970 INFO L430 AbstractCegarLoop]: === Iteration 511 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:33,970 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:33,970 INFO L82 PathProgramCache]: Analyzing trace with hash 676002051, now seen corresponding path program 356 times [2021-06-05 15:12:33,970 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:33,970 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [966209142] [2021-06-05 15:12:33,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:33,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:34,062 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:34,062 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:34,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [966209142] [2021-06-05 15:12:34,062 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [966209142] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:34,062 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [704467295] [2021-06-05 15:12:34,062 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 511 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:34,087 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:34,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:34,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:34,088 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:34,159 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:34,159 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:34,160 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:34,168 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:34,168 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:34,168 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:34,245 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:34,245 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [704467295] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:34,245 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:34,245 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:34,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2166641] [2021-06-05 15:12:34,245 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:34,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:34,245 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:34,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:34,245 INFO L87 Difference]: Start difference. First operand 3920 states and 16448 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:34,805 INFO L93 Difference]: Finished difference Result 4579 states and 19011 transitions. [2021-06-05 15:12:34,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:12:34,805 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:34,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:34,813 INFO L225 Difference]: With dead ends: 4579 [2021-06-05 15:12:34,813 INFO L226 Difference]: Without dead ends: 4554 [2021-06-05 15:12:34,813 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 498.8ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:12:34,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4554 states. [2021-06-05 15:12:34,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4554 to 3924. [2021-06-05 15:12:34,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3924 states, 3923 states have (on average 4.196788172317104) internal successors, (16464), 3923 states have internal predecessors, (16464), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3924 states to 3924 states and 16464 transitions. [2021-06-05 15:12:34,866 INFO L78 Accepts]: Start accepts. Automaton has 3924 states and 16464 transitions. Word has length 23 [2021-06-05 15:12:34,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:34,866 INFO L482 AbstractCegarLoop]: Abstraction has 3924 states and 16464 transitions. [2021-06-05 15:12:34,866 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:34,866 INFO L276 IsEmpty]: Start isEmpty. Operand 3924 states and 16464 transitions. [2021-06-05 15:12:34,871 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:34,871 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:34,871 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:35,071 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 511 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1112 [2021-06-05 15:12:35,072 INFO L430 AbstractCegarLoop]: === Iteration 512 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:35,072 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:35,072 INFO L82 PathProgramCache]: Analyzing trace with hash 1751713207, now seen corresponding path program 357 times [2021-06-05 15:12:35,072 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:35,072 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186151406] [2021-06-05 15:12:35,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:35,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:35,191 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:35,191 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:35,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186151406] [2021-06-05 15:12:35,191 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186151406] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:35,191 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1596234209] [2021-06-05 15:12:35,191 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 512 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:35,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:12:35,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:35,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:35,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:35,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:35,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:35,292 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:35,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:35,300 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:35,300 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:35,376 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:35,376 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1596234209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:35,376 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:35,376 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:35,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630952737] [2021-06-05 15:12:35,377 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:35,377 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:35,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:35,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:35,377 INFO L87 Difference]: Start difference. First operand 3924 states and 16464 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:36,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:36,199 INFO L93 Difference]: Finished difference Result 4583 states and 19039 transitions. [2021-06-05 15:12:36,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:12:36,199 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:36,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:36,207 INFO L225 Difference]: With dead ends: 4583 [2021-06-05 15:12:36,207 INFO L226 Difference]: Without dead ends: 4562 [2021-06-05 15:12:36,208 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 692.5ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:12:36,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4562 states. [2021-06-05 15:12:36,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4562 to 3916. [2021-06-05 15:12:36,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:36,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 15:12:36,263 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 15:12:36,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:36,264 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 15:12:36,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:36,264 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 15:12:36,269 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:36,269 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:36,269 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:36,469 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 512 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1114 [2021-06-05 15:12:36,469 INFO L430 AbstractCegarLoop]: === Iteration 513 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:36,470 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:36,470 INFO L82 PathProgramCache]: Analyzing trace with hash 571982697, now seen corresponding path program 358 times [2021-06-05 15:12:36,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:36,470 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271084178] [2021-06-05 15:12:36,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:36,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:36,557 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:36,557 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:36,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271084178] [2021-06-05 15:12:36,557 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271084178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:36,557 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [696947172] [2021-06-05 15:12:36,557 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 513 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:36,580 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:36,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:36,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:36,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:36,664 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:36,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:36,666 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:36,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:36,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:36,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:36,734 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:36,734 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [696947172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:36,734 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:36,734 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:36,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [231896223] [2021-06-05 15:12:36,735 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:36,735 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:36,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:36,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:36,735 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:37,334 INFO L93 Difference]: Finished difference Result 4620 states and 19163 transitions. [2021-06-05 15:12:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:12:37,335 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:37,343 INFO L225 Difference]: With dead ends: 4620 [2021-06-05 15:12:37,343 INFO L226 Difference]: Without dead ends: 4589 [2021-06-05 15:12:37,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 422.6ms TimeCoverageRelationStatistics Valid=165, Invalid=765, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:37,347 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4589 states. [2021-06-05 15:12:37,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4589 to 3916. [2021-06-05 15:12:37,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.196679438058748) internal successors, (16430), 3915 states have internal predecessors, (16430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:37,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16430 transitions. [2021-06-05 15:12:37,398 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16430 transitions. Word has length 23 [2021-06-05 15:12:37,398 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:37,399 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16430 transitions. [2021-06-05 15:12:37,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:37,399 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16430 transitions. [2021-06-05 15:12:37,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:37,404 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:37,404 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:37,604 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1116,513 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:37,604 INFO L430 AbstractCegarLoop]: === Iteration 514 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:37,604 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:37,604 INFO L82 PathProgramCache]: Analyzing trace with hash -2059528121, now seen corresponding path program 359 times [2021-06-05 15:12:37,605 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:37,605 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400441407] [2021-06-05 15:12:37,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:37,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:37,696 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:37,696 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400441407] [2021-06-05 15:12:37,696 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400441407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:37,696 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211586848] [2021-06-05 15:12:37,696 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 514 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:37,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:12:37,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:37,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:37,814 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:37,814 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:37,815 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:37,822 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:37,823 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:37,823 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:37,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:37,897 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211586848] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:37,897 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:37,897 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:37,897 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69047443] [2021-06-05 15:12:37,897 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:37,897 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:37,897 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:37,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:37,898 INFO L87 Difference]: Start difference. First operand 3916 states and 16430 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:38,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:38,764 INFO L93 Difference]: Finished difference Result 4481 states and 18639 transitions. [2021-06-05 15:12:38,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:12:38,764 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:38,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:38,772 INFO L225 Difference]: With dead ends: 4481 [2021-06-05 15:12:38,772 INFO L226 Difference]: Without dead ends: 4460 [2021-06-05 15:12:38,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 629.4ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:12:38,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4460 states. [2021-06-05 15:12:38,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4460 to 3908. [2021-06-05 15:12:38,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.197850012797542) internal successors, (16401), 3907 states have internal predecessors, (16401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:38,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16401 transitions. [2021-06-05 15:12:38,825 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16401 transitions. Word has length 23 [2021-06-05 15:12:38,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:38,825 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16401 transitions. [2021-06-05 15:12:38,825 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:38,825 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16401 transitions. [2021-06-05 15:12:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:38,830 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:38,830 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:39,030 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1118,514 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:39,030 INFO L430 AbstractCegarLoop]: === Iteration 515 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:39,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:39,031 INFO L82 PathProgramCache]: Analyzing trace with hash 1971726573, now seen corresponding path program 360 times [2021-06-05 15:12:39,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:39,031 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314749157] [2021-06-05 15:12:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:39,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:39,119 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:39,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314749157] [2021-06-05 15:12:39,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314749157] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:39,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46880810] [2021-06-05 15:12:39,119 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 515 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:39,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:39,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:39,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:39,226 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:39,238 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:39,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:12:39,241 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:12:39,264 INFO L628 ElimStorePlain]: treesize reduction 55, result has 28.6 percent of original size [2021-06-05 15:12:39,264 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:39,264 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:33, output treesize:22 [2021-06-05 15:12:39,323 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:39,323 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [46880810] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:39,323 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:39,323 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:12:39,323 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714129660] [2021-06-05 15:12:39,323 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:39,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:39,323 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:39,323 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:39,324 INFO L87 Difference]: Start difference. First operand 3908 states and 16401 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:39,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:39,948 INFO L93 Difference]: Finished difference Result 4190 states and 17466 transitions. [2021-06-05 15:12:39,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:12:39,948 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:39,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:39,955 INFO L225 Difference]: With dead ends: 4190 [2021-06-05 15:12:39,955 INFO L226 Difference]: Without dead ends: 4164 [2021-06-05 15:12:39,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 385.7ms TimeCoverageRelationStatistics Valid=121, Invalid=809, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:39,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4164 states. [2021-06-05 15:12:39,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4164 to 3915. [2021-06-05 15:12:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3915 states, 3914 states have (on average 4.196474195196729) internal successors, (16425), 3914 states have internal predecessors, (16425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3915 states to 3915 states and 16425 transitions. [2021-06-05 15:12:40,007 INFO L78 Accepts]: Start accepts. Automaton has 3915 states and 16425 transitions. Word has length 23 [2021-06-05 15:12:40,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:40,007 INFO L482 AbstractCegarLoop]: Abstraction has 3915 states and 16425 transitions. [2021-06-05 15:12:40,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,007 INFO L276 IsEmpty]: Start isEmpty. Operand 3915 states and 16425 transitions. [2021-06-05 15:12:40,012 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:40,012 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:40,012 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:40,213 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1120,515 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:40,213 INFO L430 AbstractCegarLoop]: === Iteration 516 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:40,213 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:40,213 INFO L82 PathProgramCache]: Analyzing trace with hash 930150505, now seen corresponding path program 361 times [2021-06-05 15:12:40,213 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:40,213 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1346195412] [2021-06-05 15:12:40,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:40,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:40,326 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:40,327 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:40,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1346195412] [2021-06-05 15:12:40,327 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1346195412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:40,327 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837303196] [2021-06-05 15:12:40,327 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 516 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:40,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:40,351 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:40,351 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:40,428 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:40,428 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:40,430 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:40,438 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:40,439 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:40,439 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:12:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:40,521 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [837303196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:40,521 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:40,521 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:40,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249953687] [2021-06-05 15:12:40,521 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:40,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:40,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:40,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:40,521 INFO L87 Difference]: Start difference. First operand 3915 states and 16425 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:40,935 INFO L93 Difference]: Finished difference Result 4159 states and 17347 transitions. [2021-06-05 15:12:40,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:40,935 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:40,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:40,942 INFO L225 Difference]: With dead ends: 4159 [2021-06-05 15:12:40,942 INFO L226 Difference]: Without dead ends: 4131 [2021-06-05 15:12:40,942 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 354.6ms TimeCoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:40,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4131 states. [2021-06-05 15:12:40,981 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4131 to 3908. [2021-06-05 15:12:40,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.197082160225237) internal successors, (16398), 3907 states have internal predecessors, (16398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16398 transitions. [2021-06-05 15:12:40,992 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16398 transitions. Word has length 23 [2021-06-05 15:12:40,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:40,993 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16398 transitions. [2021-06-05 15:12:40,993 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:40,993 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16398 transitions. [2021-06-05 15:12:40,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:40,998 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:40,998 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:41,198 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1124,516 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:41,198 INFO L430 AbstractCegarLoop]: === Iteration 517 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:41,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:41,198 INFO L82 PathProgramCache]: Analyzing trace with hash 44352225, now seen corresponding path program 362 times [2021-06-05 15:12:41,198 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:41,198 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314772477] [2021-06-05 15:12:41,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:41,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:41,286 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:41,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:41,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314772477] [2021-06-05 15:12:41,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314772477] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:41,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100003716] [2021-06-05 15:12:41,286 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 517 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:41,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:41,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:41,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:41,400 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:41,400 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:41,401 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:41,408 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:41,409 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:41,409 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:41,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:41,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1100003716] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:41,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:41,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:41,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062130103] [2021-06-05 15:12:41,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:41,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:41,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:41,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:41,470 INFO L87 Difference]: Start difference. First operand 3908 states and 16398 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:41,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:41,963 INFO L93 Difference]: Finished difference Result 4325 states and 18000 transitions. [2021-06-05 15:12:41,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:12:41,963 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:41,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:41,970 INFO L225 Difference]: With dead ends: 4325 [2021-06-05 15:12:41,971 INFO L226 Difference]: Without dead ends: 4291 [2021-06-05 15:12:41,971 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 329.9ms TimeCoverageRelationStatistics Valid=108, Invalid=542, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:41,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4291 states. [2021-06-05 15:12:42,010 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4291 to 3901. [2021-06-05 15:12:42,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.197435897435898) internal successors, (16370), 3900 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16370 transitions. [2021-06-05 15:12:42,021 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16370 transitions. Word has length 23 [2021-06-05 15:12:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:42,021 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16370 transitions. [2021-06-05 15:12:42,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,022 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16370 transitions. [2021-06-05 15:12:42,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:42,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:42,027 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:42,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 517 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1126 [2021-06-05 15:12:42,227 INFO L430 AbstractCegarLoop]: === Iteration 518 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash -140702057, now seen corresponding path program 363 times [2021-06-05 15:12:42,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:42,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2075002637] [2021-06-05 15:12:42,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:42,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:42,321 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:42,322 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:42,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2075002637] [2021-06-05 15:12:42,322 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2075002637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:42,322 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251280304] [2021-06-05 15:12:42,322 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 518 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:42,345 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:42,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:42,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:42,409 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:42,410 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:42,411 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:42,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:42,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:42,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:42,517 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:42,517 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251280304] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:42,517 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:42,517 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:42,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043379650] [2021-06-05 15:12:42,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:42,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:42,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:42,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:42,517 INFO L87 Difference]: Start difference. First operand 3901 states and 16370 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:42,873 INFO L93 Difference]: Finished difference Result 4120 states and 17191 transitions. [2021-06-05 15:12:42,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:42,873 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:42,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:42,880 INFO L225 Difference]: With dead ends: 4120 [2021-06-05 15:12:42,880 INFO L226 Difference]: Without dead ends: 4094 [2021-06-05 15:12:42,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 331.4ms TimeCoverageRelationStatistics Valid=107, Invalid=445, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:42,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4094 states. [2021-06-05 15:12:42,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4094 to 3910. [2021-06-05 15:12:42,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.195958045535943) internal successors, (16402), 3909 states have internal predecessors, (16402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16402 transitions. [2021-06-05 15:12:42,930 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16402 transitions. Word has length 23 [2021-06-05 15:12:42,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:42,930 INFO L482 AbstractCegarLoop]: Abstraction has 3910 states and 16402 transitions. [2021-06-05 15:12:42,930 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:42,930 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16402 transitions. [2021-06-05 15:12:42,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:42,935 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:42,935 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:43,135 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1128,518 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:43,135 INFO L430 AbstractCegarLoop]: === Iteration 519 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:43,135 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:43,135 INFO L82 PathProgramCache]: Analyzing trace with hash -1182278125, now seen corresponding path program 364 times [2021-06-05 15:12:43,136 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:43,136 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1897743395] [2021-06-05 15:12:43,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:43,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:43,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:43,232 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1897743395] [2021-06-05 15:12:43,232 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1897743395] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:43,232 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1844888375] [2021-06-05 15:12:43,232 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 519 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:43,254 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:43,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:43,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:43,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:43,325 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:43,325 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:43,326 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:43,334 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:43,335 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:43,335 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:43,435 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:43,435 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1844888375] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:43,435 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:43,435 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:43,435 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [257425230] [2021-06-05 15:12:43,435 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:43,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:43,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:43,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:43,436 INFO L87 Difference]: Start difference. First operand 3910 states and 16402 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:43,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:43,799 INFO L93 Difference]: Finished difference Result 4119 states and 17186 transitions. [2021-06-05 15:12:43,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:43,799 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:43,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:43,806 INFO L225 Difference]: With dead ends: 4119 [2021-06-05 15:12:43,806 INFO L226 Difference]: Without dead ends: 4091 [2021-06-05 15:12:43,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 363.9ms TimeCoverageRelationStatistics Valid=104, Invalid=448, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:43,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4091 states. [2021-06-05 15:12:43,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4091 to 3903. [2021-06-05 15:12:43,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.1973347001537675) internal successors, (16378), 3902 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:43,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16378 transitions. [2021-06-05 15:12:43,856 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16378 transitions. Word has length 23 [2021-06-05 15:12:43,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:43,856 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16378 transitions. [2021-06-05 15:12:43,856 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:43,856 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16378 transitions. [2021-06-05 15:12:43,861 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:43,862 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:43,862 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:44,062 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 519 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1130 [2021-06-05 15:12:44,062 INFO L430 AbstractCegarLoop]: === Iteration 520 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:44,062 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:44,062 INFO L82 PathProgramCache]: Analyzing trace with hash -1469399477, now seen corresponding path program 365 times [2021-06-05 15:12:44,062 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:44,062 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587482993] [2021-06-05 15:12:44,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:44,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:44,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587482993] [2021-06-05 15:12:44,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587482993] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:44,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1808924844] [2021-06-05 15:12:44,155 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 520 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:44,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:12:44,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:44,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:44,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:44,241 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:44,242 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:44,243 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:44,251 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:44,252 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:44,252 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:44,349 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:44,349 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1808924844] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:44,349 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:44,349 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:44,349 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [126760080] [2021-06-05 15:12:44,349 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:44,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:44,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:44,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:44,350 INFO L87 Difference]: Start difference. First operand 3903 states and 16378 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:44,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:44,695 INFO L93 Difference]: Finished difference Result 4143 states and 17282 transitions. [2021-06-05 15:12:44,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:44,695 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:44,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:44,702 INFO L225 Difference]: With dead ends: 4143 [2021-06-05 15:12:44,702 INFO L226 Difference]: Without dead ends: 4117 [2021-06-05 15:12:44,702 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 331.6ms TimeCoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:44,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4117 states. [2021-06-05 15:12:44,742 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4117 to 3907. [2021-06-05 15:12:44,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.197132616487456) internal successors, (16394), 3906 states have internal predecessors, (16394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:44,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16394 transitions. [2021-06-05 15:12:44,753 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16394 transitions. Word has length 23 [2021-06-05 15:12:44,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:44,753 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16394 transitions. [2021-06-05 15:12:44,753 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:44,753 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16394 transitions. [2021-06-05 15:12:44,758 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:44,758 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:44,758 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:44,958 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 520 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1132 [2021-06-05 15:12:44,959 INFO L430 AbstractCegarLoop]: === Iteration 521 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:44,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:44,959 INFO L82 PathProgramCache]: Analyzing trace with hash -1962616863, now seen corresponding path program 366 times [2021-06-05 15:12:44,959 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:44,959 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749123629] [2021-06-05 15:12:44,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:44,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:45,053 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:45,053 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:45,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749123629] [2021-06-05 15:12:45,053 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749123629] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:45,053 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1796060036] [2021-06-05 15:12:45,053 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 521 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:45,077 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2021-06-05 15:12:45,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:45,077 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:12:45,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:45,165 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:12:45,166 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:12:45,167 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:45,178 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:45,179 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:45,179 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 15:12:45,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:45,282 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1796060036] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:45,282 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:45,282 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:12:45,282 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959704342] [2021-06-05 15:12:45,282 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:45,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:45,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:45,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:45,283 INFO L87 Difference]: Start difference. First operand 3907 states and 16394 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:45,907 INFO L93 Difference]: Finished difference Result 4222 states and 17600 transitions. [2021-06-05 15:12:45,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:12:45,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:45,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:45,914 INFO L225 Difference]: With dead ends: 4222 [2021-06-05 15:12:45,914 INFO L226 Difference]: Without dead ends: 4201 [2021-06-05 15:12:45,914 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 497.9ms TimeCoverageRelationStatistics Valid=151, Invalid=905, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:12:45,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4201 states. [2021-06-05 15:12:45,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4201 to 3903. [2021-06-05 15:12:45,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.1973347001537675) internal successors, (16378), 3902 states have internal predecessors, (16378), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16378 transitions. [2021-06-05 15:12:45,964 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16378 transitions. Word has length 23 [2021-06-05 15:12:45,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:45,964 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16378 transitions. [2021-06-05 15:12:45,964 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:45,964 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16378 transitions. [2021-06-05 15:12:45,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:45,969 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:45,969 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:46,170 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 521 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1134 [2021-06-05 15:12:46,170 INFO L430 AbstractCegarLoop]: === Iteration 522 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:46,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:46,170 INFO L82 PathProgramCache]: Analyzing trace with hash -1027840607, now seen corresponding path program 367 times [2021-06-05 15:12:46,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:46,170 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340577727] [2021-06-05 15:12:46,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:46,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:46,267 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340577727] [2021-06-05 15:12:46,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [340577727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:46,267 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333501221] [2021-06-05 15:12:46,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 522 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:46,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:46,291 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:46,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:46,357 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:46,357 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:46,358 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:46,367 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:46,368 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:46,368 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:46,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:46,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1333501221] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:46,466 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:46,466 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:46,466 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464748823] [2021-06-05 15:12:46,467 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:46,467 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:46,467 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:46,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:46,467 INFO L87 Difference]: Start difference. First operand 3903 states and 16378 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:46,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:46,945 INFO L93 Difference]: Finished difference Result 4184 states and 17448 transitions. [2021-06-05 15:12:46,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:12:46,946 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:46,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:46,953 INFO L225 Difference]: With dead ends: 4184 [2021-06-05 15:12:46,953 INFO L226 Difference]: Without dead ends: 4159 [2021-06-05 15:12:46,953 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:12:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4159 states. [2021-06-05 15:12:46,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4159 to 3907. [2021-06-05 15:12:46,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.197132616487456) internal successors, (16394), 3906 states have internal predecessors, (16394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:47,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16394 transitions. [2021-06-05 15:12:47,003 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16394 transitions. Word has length 23 [2021-06-05 15:12:47,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:47,003 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16394 transitions. [2021-06-05 15:12:47,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:47,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16394 transitions. [2021-06-05 15:12:47,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:47,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:47,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:47,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1138,522 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:47,209 INFO L430 AbstractCegarLoop]: === Iteration 523 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:47,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:47,209 INFO L82 PathProgramCache]: Analyzing trace with hash -2040533139, now seen corresponding path program 368 times [2021-06-05 15:12:47,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:47,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1486738163] [2021-06-05 15:12:47,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:47,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:47,306 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:47,306 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:47,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1486738163] [2021-06-05 15:12:47,306 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1486738163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:47,306 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463998178] [2021-06-05 15:12:47,306 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 523 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:47,329 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:47,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:47,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:47,394 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:47,394 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:47,395 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:47,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:47,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:47,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:47,500 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:47,500 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1463998178] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:47,500 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:47,500 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:47,500 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054873364] [2021-06-05 15:12:47,500 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:47,500 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:47,501 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:47,501 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:47,501 INFO L87 Difference]: Start difference. First operand 3907 states and 16394 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:48,196 INFO L93 Difference]: Finished difference Result 4176 states and 17426 transitions. [2021-06-05 15:12:48,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:12:48,196 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:48,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:48,203 INFO L225 Difference]: With dead ends: 4176 [2021-06-05 15:12:48,203 INFO L226 Difference]: Without dead ends: 4155 [2021-06-05 15:12:48,203 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 623.8ms TimeCoverageRelationStatistics Valid=162, Invalid=708, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:12:48,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4155 states. [2021-06-05 15:12:48,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4155 to 3901. [2021-06-05 15:12:48,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.197435897435898) internal successors, (16370), 3900 states have internal predecessors, (16370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16370 transitions. [2021-06-05 15:12:48,255 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16370 transitions. Word has length 23 [2021-06-05 15:12:48,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:48,255 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16370 transitions. [2021-06-05 15:12:48,255 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:48,255 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16370 transitions. [2021-06-05 15:12:48,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:48,260 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:48,260 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:48,460 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1140,523 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:48,460 INFO L430 AbstractCegarLoop]: === Iteration 524 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:48,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:48,461 INFO L82 PathProgramCache]: Analyzing trace with hash 536947987, now seen corresponding path program 369 times [2021-06-05 15:12:48,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:48,461 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1074167006] [2021-06-05 15:12:48,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:48,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:48,547 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:48,547 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:48,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1074167006] [2021-06-05 15:12:48,547 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1074167006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:48,547 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789032658] [2021-06-05 15:12:48,547 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 524 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:48,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:12:48,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:48,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:48,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:48,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:48,657 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:12:48,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:48,666 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:48,667 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:48,667 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:12:48,728 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:48,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1789032658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:48,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:48,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:48,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1517871562] [2021-06-05 15:12:48,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:48,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:48,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:48,729 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:48,729 INFO L87 Difference]: Start difference. First operand 3901 states and 16370 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:49,166 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:49,166 INFO L93 Difference]: Finished difference Result 4404 states and 18312 transitions. [2021-06-05 15:12:49,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:12:49,167 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:49,167 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:49,174 INFO L225 Difference]: With dead ends: 4404 [2021-06-05 15:12:49,174 INFO L226 Difference]: Without dead ends: 4373 [2021-06-05 15:12:49,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 395.2ms TimeCoverageRelationStatistics Valid=142, Invalid=728, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:12:49,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4373 states. [2021-06-05 15:12:49,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4373 to 3903. [2021-06-05 15:12:49,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196822142491031) internal successors, (16376), 3902 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:49,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16376 transitions. [2021-06-05 15:12:49,226 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16376 transitions. Word has length 23 [2021-06-05 15:12:49,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:49,226 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16376 transitions. [2021-06-05 15:12:49,226 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:49,226 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16376 transitions. [2021-06-05 15:12:49,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:49,231 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:49,231 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:49,431 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1142,524 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:49,431 INFO L430 AbstractCegarLoop]: === Iteration 525 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:49,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:49,431 INFO L82 PathProgramCache]: Analyzing trace with hash 1577183785, now seen corresponding path program 370 times [2021-06-05 15:12:49,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:49,432 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758548875] [2021-06-05 15:12:49,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:49,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:49,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:49,523 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:49,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758548875] [2021-06-05 15:12:49,523 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1758548875] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:49,523 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671630462] [2021-06-05 15:12:49,523 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 525 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:49,546 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:49,546 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:49,547 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:49,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:49,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:49,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:49,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:49,629 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:49,629 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:49,629 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:49,707 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:49,707 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671630462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:49,707 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:49,707 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:49,707 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473095805] [2021-06-05 15:12:49,707 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:49,708 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:49,708 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:49,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:49,708 INFO L87 Difference]: Start difference. First operand 3903 states and 16376 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:50,226 INFO L93 Difference]: Finished difference Result 4322 states and 17993 transitions. [2021-06-05 15:12:50,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:12:50,227 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:50,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:50,234 INFO L225 Difference]: With dead ends: 4322 [2021-06-05 15:12:50,234 INFO L226 Difference]: Without dead ends: 4297 [2021-06-05 15:12:50,234 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 484.0ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:12:50,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4297 states. [2021-06-05 15:12:50,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4297 to 3907. [2021-06-05 15:12:50,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.196620583717358) internal successors, (16392), 3906 states have internal predecessors, (16392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16392 transitions. [2021-06-05 15:12:50,289 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16392 transitions. Word has length 23 [2021-06-05 15:12:50,289 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:50,289 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16392 transitions. [2021-06-05 15:12:50,289 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:50,289 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16392 transitions. [2021-06-05 15:12:50,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:50,294 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:50,294 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:50,494 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 525 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1144 [2021-06-05 15:12:50,495 INFO L430 AbstractCegarLoop]: === Iteration 526 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:50,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:50,495 INFO L82 PathProgramCache]: Analyzing trace with hash 564491253, now seen corresponding path program 371 times [2021-06-05 15:12:50,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:50,495 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895671612] [2021-06-05 15:12:50,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:50,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:50,610 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:50,610 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:50,610 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895671612] [2021-06-05 15:12:50,611 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895671612] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:50,611 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1368647010] [2021-06-05 15:12:50,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 526 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:50,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:12:50,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:50,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:50,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:50,709 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:50,709 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:50,710 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:50,718 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:50,718 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:50,718 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:50,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:50,795 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1368647010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:50,795 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:50,795 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:50,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771695252] [2021-06-05 15:12:50,795 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:50,795 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:50,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:50,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:50,796 INFO L87 Difference]: Start difference. First operand 3907 states and 16392 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:51,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:51,563 INFO L93 Difference]: Finished difference Result 4340 states and 18073 transitions. [2021-06-05 15:12:51,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:12:51,564 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:51,564 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:51,572 INFO L225 Difference]: With dead ends: 4340 [2021-06-05 15:12:51,573 INFO L226 Difference]: Without dead ends: 4319 [2021-06-05 15:12:51,573 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 208 ImplicationChecksByTransitivity, 635.6ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:12:51,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4319 states. [2021-06-05 15:12:51,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4319 to 3899. [2021-06-05 15:12:51,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196511031298102) internal successors, (16358), 3898 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:51,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16358 transitions. [2021-06-05 15:12:51,628 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16358 transitions. Word has length 23 [2021-06-05 15:12:51,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:51,628 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16358 transitions. [2021-06-05 15:12:51,628 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:51,628 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16358 transitions. [2021-06-05 15:12:51,633 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:51,633 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:51,633 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:51,834 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 526 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1146 [2021-06-05 15:12:51,834 INFO L430 AbstractCegarLoop]: === Iteration 527 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:51,834 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:51,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1581030667, now seen corresponding path program 372 times [2021-06-05 15:12:51,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:51,834 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115458089] [2021-06-05 15:12:51,834 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:51,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:51,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:51,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:51,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115458089] [2021-06-05 15:12:51,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115458089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:51,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105024590] [2021-06-05 15:12:51,917 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 527 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:51,940 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:51,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:51,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:12:51,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:52,074 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:12:52,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 61 treesize of output 72 [2021-06-05 15:12:52,084 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:52,101 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:12:52,101 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:52,101 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:61, output treesize:14 [2021-06-05 15:12:52,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:52,137 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105024590] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:52,137 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:52,137 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:12:52,137 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465576510] [2021-06-05 15:12:52,137 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:52,137 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:52,137 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:52,138 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:52,138 INFO L87 Difference]: Start difference. First operand 3899 states and 16358 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:52,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:52,990 INFO L93 Difference]: Finished difference Result 4355 states and 18141 transitions. [2021-06-05 15:12:52,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:12:52,990 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:52,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:52,997 INFO L225 Difference]: With dead ends: 4355 [2021-06-05 15:12:52,997 INFO L226 Difference]: Without dead ends: 4333 [2021-06-05 15:12:52,998 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 244 ImplicationChecksByTransitivity, 436.8ms TimeCoverageRelationStatistics Valid=153, Invalid=1107, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:12:53,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4333 states. [2021-06-05 15:12:53,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4333 to 3903. [2021-06-05 15:12:53,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196822142491031) internal successors, (16376), 3902 states have internal predecessors, (16376), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16376 transitions. [2021-06-05 15:12:53,069 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16376 transitions. Word has length 23 [2021-06-05 15:12:53,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:53,069 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16376 transitions. [2021-06-05 15:12:53,069 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,069 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16376 transitions. [2021-06-05 15:12:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:53,074 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:53,075 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:53,275 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1148,527 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:53,275 INFO L430 AbstractCegarLoop]: === Iteration 528 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:53,275 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:53,275 INFO L82 PathProgramCache]: Analyzing trace with hash -995696715, now seen corresponding path program 373 times [2021-06-05 15:12:53,276 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:53,276 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140206053] [2021-06-05 15:12:53,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:53,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:53,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:53,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140206053] [2021-06-05 15:12:53,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140206053] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:53,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549784965] [2021-06-05 15:12:53,359 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 528 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:53,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:53,382 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:53,382 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:53,459 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:53,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:53,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:53,468 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:53,469 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:53,469 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:53,543 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:53,544 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [549784965] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:53,544 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:53,544 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:53,544 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665391816] [2021-06-05 15:12:53,544 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:53,544 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:53,544 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:53,544 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:53,544 INFO L87 Difference]: Start difference. First operand 3903 states and 16376 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,926 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:53,926 INFO L93 Difference]: Finished difference Result 4217 states and 17575 transitions. [2021-06-05 15:12:53,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:12:53,927 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:53,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:53,934 INFO L225 Difference]: With dead ends: 4217 [2021-06-05 15:12:53,934 INFO L226 Difference]: Without dead ends: 4191 [2021-06-05 15:12:53,934 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 367.9ms TimeCoverageRelationStatistics Valid=131, Invalid=571, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:12:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4191 states. [2021-06-05 15:12:53,975 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4191 to 3907. [2021-06-05 15:12:53,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.196620583717358) internal successors, (16392), 3906 states have internal predecessors, (16392), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16392 transitions. [2021-06-05 15:12:53,988 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16392 transitions. Word has length 23 [2021-06-05 15:12:53,988 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:53,988 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16392 transitions. [2021-06-05 15:12:53,988 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:53,988 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16392 transitions. [2021-06-05 15:12:53,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:53,993 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:53,993 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:54,194 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1152,528 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:54,194 INFO L430 AbstractCegarLoop]: === Iteration 529 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:54,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:54,194 INFO L82 PathProgramCache]: Analyzing trace with hash 617870019, now seen corresponding path program 374 times [2021-06-05 15:12:54,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:54,194 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1211382646] [2021-06-05 15:12:54,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:54,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:54,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:54,278 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1211382646] [2021-06-05 15:12:54,278 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1211382646] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:54,278 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068642961] [2021-06-05 15:12:54,278 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 529 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:54,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:12:54,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:54,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:54,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:54,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:54,379 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:54,380 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:54,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:54,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:54,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:12:54,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:54,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1068642961] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:54,464 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:54,464 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:54,464 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230842279] [2021-06-05 15:12:54,465 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:54,465 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:54,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:54,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:54,465 INFO L87 Difference]: Start difference. First operand 3907 states and 16392 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:55,172 INFO L93 Difference]: Finished difference Result 4216 states and 17584 transitions. [2021-06-05 15:12:55,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:12:55,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:55,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:55,180 INFO L225 Difference]: With dead ends: 4216 [2021-06-05 15:12:55,180 INFO L226 Difference]: Without dead ends: 4195 [2021-06-05 15:12:55,181 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 609.2ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:55,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4195 states. [2021-06-05 15:12:55,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4195 to 3899. [2021-06-05 15:12:55,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196511031298102) internal successors, (16358), 3898 states have internal predecessors, (16358), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16358 transitions. [2021-06-05 15:12:55,235 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16358 transitions. Word has length 23 [2021-06-05 15:12:55,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:55,235 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16358 transitions. [2021-06-05 15:12:55,235 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:55,235 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16358 transitions. [2021-06-05 15:12:55,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:55,240 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:55,240 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:55,440 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 529 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1154 [2021-06-05 15:12:55,441 INFO L430 AbstractCegarLoop]: === Iteration 530 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:55,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:55,441 INFO L82 PathProgramCache]: Analyzing trace with hash 61981813, now seen corresponding path program 375 times [2021-06-05 15:12:55,441 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:55,441 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835230154] [2021-06-05 15:12:55,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:55,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:55,531 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:55,531 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:55,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835230154] [2021-06-05 15:12:55,531 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835230154] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:55,531 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456838755] [2021-06-05 15:12:55,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 530 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:55,555 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2021-06-05 15:12:55,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:55,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:55,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:55,620 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:55,620 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:55,621 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:55,630 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:55,630 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:55,630 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:55,750 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:55,750 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456838755] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:55,750 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:55,750 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:55,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077817805] [2021-06-05 15:12:55,750 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:55,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:55,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:55,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:55,751 INFO L87 Difference]: Start difference. First operand 3899 states and 16358 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:56,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:56,060 INFO L93 Difference]: Finished difference Result 4126 states and 17214 transitions. [2021-06-05 15:12:56,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:12:56,061 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:56,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:56,068 INFO L225 Difference]: With dead ends: 4126 [2021-06-05 15:12:56,068 INFO L226 Difference]: Without dead ends: 4100 [2021-06-05 15:12:56,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 354.4ms TimeCoverageRelationStatistics Valid=106, Invalid=446, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:56,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4100 states. [2021-06-05 15:12:56,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4100 to 3908. [2021-06-05 15:12:56,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3908 states, 3907 states have (on average 4.195034553365754) internal successors, (16390), 3907 states have internal predecessors, (16390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3908 states to 3908 states and 16390 transitions. [2021-06-05 15:12:56,119 INFO L78 Accepts]: Start accepts. Automaton has 3908 states and 16390 transitions. Word has length 23 [2021-06-05 15:12:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:56,119 INFO L482 AbstractCegarLoop]: Abstraction has 3908 states and 16390 transitions. [2021-06-05 15:12:56,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 3908 states and 16390 transitions. [2021-06-05 15:12:56,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:56,124 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:56,124 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:56,324 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1156,530 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:56,325 INFO L430 AbstractCegarLoop]: === Iteration 531 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:56,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:56,325 INFO L82 PathProgramCache]: Analyzing trace with hash -979594255, now seen corresponding path program 376 times [2021-06-05 15:12:56,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:56,325 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1774354632] [2021-06-05 15:12:56,325 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:56,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:56,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:56,417 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:56,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1774354632] [2021-06-05 15:12:56,417 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1774354632] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:56,417 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719904504] [2021-06-05 15:12:56,417 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 531 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:56,439 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:12:56,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:56,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:56,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:56,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:56,507 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:56,508 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:56,517 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:56,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:56,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:56,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:56,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [719904504] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:56,618 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:56,618 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:56,618 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737900576] [2021-06-05 15:12:56,619 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:56,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:56,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:56,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:56,619 INFO L87 Difference]: Start difference. First operand 3908 states and 16390 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:56,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:56,996 INFO L93 Difference]: Finished difference Result 4083 states and 17047 transitions. [2021-06-05 15:12:56,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-06-05 15:12:56,997 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:56,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:57,003 INFO L225 Difference]: With dead ends: 4083 [2021-06-05 15:12:57,004 INFO L226 Difference]: Without dead ends: 4055 [2021-06-05 15:12:57,004 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 99 ImplicationChecksByTransitivity, 364.7ms TimeCoverageRelationStatistics Valid=105, Invalid=447, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:57,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4055 states. [2021-06-05 15:12:57,041 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4055 to 3901. [2021-06-05 15:12:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196410256410257) internal successors, (16366), 3900 states have internal predecessors, (16366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16366 transitions. [2021-06-05 15:12:57,052 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16366 transitions. Word has length 23 [2021-06-05 15:12:57,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:57,052 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16366 transitions. [2021-06-05 15:12:57,052 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,052 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16366 transitions. [2021-06-05 15:12:57,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:57,057 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:57,057 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:57,258 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 531 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1158 [2021-06-05 15:12:57,258 INFO L430 AbstractCegarLoop]: === Iteration 532 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:57,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:57,258 INFO L82 PathProgramCache]: Analyzing trace with hash -1266715607, now seen corresponding path program 377 times [2021-06-05 15:12:57,258 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:57,258 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991322998] [2021-06-05 15:12:57,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:57,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:57,347 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:57,347 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:57,347 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991322998] [2021-06-05 15:12:57,348 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [991322998] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:57,348 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435522761] [2021-06-05 15:12:57,348 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 532 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:57,371 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2021-06-05 15:12:57,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:57,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:57,372 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:57,437 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:57,437 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:57,438 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:57,446 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:57,447 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:57,447 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:57,540 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:57,540 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1435522761] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:57,540 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:57,540 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:57,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013468977] [2021-06-05 15:12:57,541 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:57,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:57,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:57,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:57,541 INFO L87 Difference]: Start difference. First operand 3901 states and 16366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,863 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:57,863 INFO L93 Difference]: Finished difference Result 4147 states and 17297 transitions. [2021-06-05 15:12:57,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-06-05 15:12:57,864 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:57,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:57,871 INFO L225 Difference]: With dead ends: 4147 [2021-06-05 15:12:57,871 INFO L226 Difference]: Without dead ends: 4121 [2021-06-05 15:12:57,871 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 325.5ms TimeCoverageRelationStatistics Valid=109, Invalid=443, Unknown=0, NotChecked=0, Total=552 [2021-06-05 15:12:57,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4121 states. [2021-06-05 15:12:57,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4121 to 3905. [2021-06-05 15:12:57,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196209016393443) internal successors, (16382), 3904 states have internal predecessors, (16382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16382 transitions. [2021-06-05 15:12:57,921 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16382 transitions. Word has length 23 [2021-06-05 15:12:57,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:57,921 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16382 transitions. [2021-06-05 15:12:57,921 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:57,922 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16382 transitions. [2021-06-05 15:12:57,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:57,927 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:57,927 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:58,127 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1160,532 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:58,127 INFO L430 AbstractCegarLoop]: === Iteration 533 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:58,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:58,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1759932993, now seen corresponding path program 378 times [2021-06-05 15:12:58,127 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:58,127 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [510207636] [2021-06-05 15:12:58,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:58,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:58,250 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:58,251 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [510207636] [2021-06-05 15:12:58,251 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [510207636] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:58,251 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [89826357] [2021-06-05 15:12:58,251 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 533 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:58,274 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:12:58,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:12:58,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:12:58,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:58,352 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:58,355 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:12:58,365 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:58,366 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 27 treesize of output 55 [2021-06-05 15:12:58,367 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:58,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:58,382 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:58,382 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:40, output treesize:54 [2021-06-05 15:12:58,483 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:58,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [89826357] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:58,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:58,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:12:58,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839681777] [2021-06-05 15:12:58,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:12:58,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:58,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:12:58,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:12:58,484 INFO L87 Difference]: Start difference. First operand 3905 states and 16382 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:12:59,177 INFO L93 Difference]: Finished difference Result 4161 states and 17362 transitions. [2021-06-05 15:12:59,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:12:59,177 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:12:59,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:12:59,184 INFO L225 Difference]: With dead ends: 4161 [2021-06-05 15:12:59,185 INFO L226 Difference]: Without dead ends: 4140 [2021-06-05 15:12:59,185 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 553.4ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:12:59,188 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4140 states. [2021-06-05 15:12:59,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4140 to 3901. [2021-06-05 15:12:59,229 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196410256410257) internal successors, (16366), 3900 states have internal predecessors, (16366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16366 transitions. [2021-06-05 15:12:59,237 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16366 transitions. Word has length 23 [2021-06-05 15:12:59,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:12:59,237 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16366 transitions. [2021-06-05 15:12:59,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:12:59,237 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16366 transitions. [2021-06-05 15:12:59,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:12:59,242 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:12:59,242 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:12:59,443 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1162,533 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:59,443 INFO L430 AbstractCegarLoop]: === Iteration 534 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:12:59,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:12:59,443 INFO L82 PathProgramCache]: Analyzing trace with hash -825156737, now seen corresponding path program 379 times [2021-06-05 15:12:59,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:12:59,443 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350694172] [2021-06-05 15:12:59,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:12:59,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:59,537 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:59,537 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:12:59,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350694172] [2021-06-05 15:12:59,537 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350694172] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:59,537 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030212997] [2021-06-05 15:12:59,537 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 534 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:12:59,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:12:59,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:12:59,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:12:59,627 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:59,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:12:59,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:12:59,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:12:59,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:12:59,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:12:59,733 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:12:59,733 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1030212997] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:12:59,733 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:12:59,733 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:12:59,733 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969431875] [2021-06-05 15:12:59,733 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:12:59,733 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:12:59,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:12:59,734 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:12:59,734 INFO L87 Difference]: Start difference. First operand 3901 states and 16366 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:00,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:00,204 INFO L93 Difference]: Finished difference Result 4152 states and 17321 transitions. [2021-06-05 15:13:00,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:13:00,205 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:00,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:00,212 INFO L225 Difference]: With dead ends: 4152 [2021-06-05 15:13:00,212 INFO L226 Difference]: Without dead ends: 4127 [2021-06-05 15:13:00,212 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 125 ImplicationChecksByTransitivity, 457.7ms TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:13:00,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4127 states. [2021-06-05 15:13:00,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4127 to 3905. [2021-06-05 15:13:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196209016393443) internal successors, (16382), 3904 states have internal predecessors, (16382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:00,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16382 transitions. [2021-06-05 15:13:00,263 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16382 transitions. Word has length 23 [2021-06-05 15:13:00,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:00,263 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16382 transitions. [2021-06-05 15:13:00,263 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:00,263 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16382 transitions. [2021-06-05 15:13:00,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:00,268 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:00,268 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:00,468 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 534 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1166 [2021-06-05 15:13:00,468 INFO L430 AbstractCegarLoop]: === Iteration 535 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:00,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:00,469 INFO L82 PathProgramCache]: Analyzing trace with hash -1837849269, now seen corresponding path program 380 times [2021-06-05 15:13:00,469 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:00,469 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667203765] [2021-06-05 15:13:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:00,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:00,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:00,566 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667203765] [2021-06-05 15:13:00,566 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667203765] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:00,566 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1290242704] [2021-06-05 15:13:00,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 535 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:00,589 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:00,589 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:00,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:00,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:00,657 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:00,658 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:00,659 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:00,667 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:00,668 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:00,668 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:13:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:00,788 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1290242704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:00,788 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:00,788 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:00,788 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2227026] [2021-06-05 15:13:00,788 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:00,788 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:00,789 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:00,789 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:00,789 INFO L87 Difference]: Start difference. First operand 3905 states and 16382 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:01,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:01,423 INFO L93 Difference]: Finished difference Result 4162 states and 17371 transitions. [2021-06-05 15:13:01,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:13:01,423 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:01,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:01,431 INFO L225 Difference]: With dead ends: 4162 [2021-06-05 15:13:01,431 INFO L226 Difference]: Without dead ends: 4141 [2021-06-05 15:13:01,431 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 168 ImplicationChecksByTransitivity, 575.0ms TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:01,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4141 states. [2021-06-05 15:13:01,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4141 to 3897. [2021-06-05 15:13:01,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.19635523613963) internal successors, (16349), 3896 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:01,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16349 transitions. [2021-06-05 15:13:01,485 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16349 transitions. Word has length 23 [2021-06-05 15:13:01,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:01,485 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16349 transitions. [2021-06-05 15:13:01,485 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:01,485 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16349 transitions. [2021-06-05 15:13:01,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:01,490 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:01,490 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:01,691 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 535 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1168 [2021-06-05 15:13:01,691 INFO L430 AbstractCegarLoop]: === Iteration 536 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:01,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:01,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1441002921, now seen corresponding path program 381 times [2021-06-05 15:13:01,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:01,691 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992939886] [2021-06-05 15:13:01,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:01,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:01,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:01,773 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:01,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992939886] [2021-06-05 15:13:01,773 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1992939886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:01,773 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328112855] [2021-06-05 15:13:01,773 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 536 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:01,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:13:01,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:01,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:01,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:01,888 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:01,888 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:01,889 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:01,897 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:01,897 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:01,897 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:01,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:01,954 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [328112855] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:01,954 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:01,954 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:01,954 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298797361] [2021-06-05 15:13:01,954 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:01,954 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:01,954 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:01,954 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:01,954 INFO L87 Difference]: Start difference. First operand 3897 states and 16349 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:02,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:02,624 INFO L93 Difference]: Finished difference Result 4278 states and 17840 transitions. [2021-06-05 15:13:02,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:13:02,624 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:02,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:02,632 INFO L225 Difference]: With dead ends: 4278 [2021-06-05 15:13:02,632 INFO L226 Difference]: Without dead ends: 4256 [2021-06-05 15:13:02,632 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 504.0ms TimeCoverageRelationStatistics Valid=162, Invalid=830, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4256 states. [2021-06-05 15:13:02,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4256 to 3905. [2021-06-05 15:13:02,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196465163934426) internal successors, (16383), 3904 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:02,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16383 transitions. [2021-06-05 15:13:02,683 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16383 transitions. Word has length 23 [2021-06-05 15:13:02,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:02,683 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16383 transitions. [2021-06-05 15:13:02,683 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:02,683 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16383 transitions. [2021-06-05 15:13:02,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:02,688 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:02,688 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:02,888 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 536 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1170 [2021-06-05 15:13:02,889 INFO L430 AbstractCegarLoop]: === Iteration 537 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:02,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:02,889 INFO L82 PathProgramCache]: Analyzing trace with hash 2026336873, now seen corresponding path program 382 times [2021-06-05 15:13:02,889 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:02,889 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945826031] [2021-06-05 15:13:02,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:02,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:02,972 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:02,972 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:02,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945826031] [2021-06-05 15:13:02,972 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945826031] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:02,972 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200130945] [2021-06-05 15:13:02,972 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 537 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:02,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:02,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:02,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:02,998 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:03,075 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:03,075 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:03,076 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:03,084 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:03,084 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:03,084 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:03,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:03,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200130945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:03,159 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:03,159 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:03,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [132986320] [2021-06-05 15:13:03,159 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:03,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:03,160 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:03,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:03,160 INFO L87 Difference]: Start difference. First operand 3905 states and 16383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:03,660 INFO L93 Difference]: Finished difference Result 4265 states and 17753 transitions. [2021-06-05 15:13:03,660 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:13:03,660 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:03,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:03,667 INFO L225 Difference]: With dead ends: 4265 [2021-06-05 15:13:03,667 INFO L226 Difference]: Without dead ends: 4239 [2021-06-05 15:13:03,667 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 382.7ms TimeCoverageRelationStatistics Valid=129, Invalid=573, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:03,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4239 states. [2021-06-05 15:13:03,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4239 to 3909. [2021-06-05 15:13:03,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.1962640736949846) internal successors, (16399), 3908 states have internal predecessors, (16399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16399 transitions. [2021-06-05 15:13:03,719 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16399 transitions. Word has length 23 [2021-06-05 15:13:03,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:03,719 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16399 transitions. [2021-06-05 15:13:03,719 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:03,719 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16399 transitions. [2021-06-05 15:13:03,724 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:03,724 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:03,724 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:03,924 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1172,537 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:03,925 INFO L430 AbstractCegarLoop]: === Iteration 538 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:03,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:03,925 INFO L82 PathProgramCache]: Analyzing trace with hash -655063689, now seen corresponding path program 383 times [2021-06-05 15:13:03,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:03,925 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366505412] [2021-06-05 15:13:03,925 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:03,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:04,008 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:04,008 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:04,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366505412] [2021-06-05 15:13:04,008 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366505412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:04,008 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1685569931] [2021-06-05 15:13:04,008 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 538 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:04,031 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:13:04,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:04,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:04,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:04,109 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:04,109 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:04,110 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:04,118 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:04,118 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:04,118 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:04,194 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:04,194 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1685569931] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:04,194 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:04,194 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:04,194 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670082623] [2021-06-05 15:13:04,194 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:04,194 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:04,194 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:04,194 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:04,194 INFO L87 Difference]: Start difference. First operand 3909 states and 16399 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:05,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:05,057 INFO L93 Difference]: Finished difference Result 4213 states and 17570 transitions. [2021-06-05 15:13:05,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:13:05,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:05,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:05,065 INFO L225 Difference]: With dead ends: 4213 [2021-06-05 15:13:05,065 INFO L226 Difference]: Without dead ends: 4192 [2021-06-05 15:13:05,065 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 726.1ms TimeCoverageRelationStatistics Valid=216, Invalid=974, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:13:05,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4192 states. [2021-06-05 15:13:05,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4192 to 3901. [2021-06-05 15:13:05,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196153846153846) internal successors, (16365), 3900 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:05,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16365 transitions. [2021-06-05 15:13:05,116 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16365 transitions. Word has length 23 [2021-06-05 15:13:05,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:05,116 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16365 transitions. [2021-06-05 15:13:05,116 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:05,116 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16365 transitions. [2021-06-05 15:13:05,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:05,121 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:05,121 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:05,321 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1174,538 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:05,321 INFO L430 AbstractCegarLoop]: === Iteration 539 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:05,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:05,322 INFO L82 PathProgramCache]: Analyzing trace with hash -94502465, now seen corresponding path program 384 times [2021-06-05 15:13:05,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:05,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747728699] [2021-06-05 15:13:05,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:05,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:05,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:05,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:05,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747728699] [2021-06-05 15:13:05,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747728699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:05,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [898494145] [2021-06-05 15:13:05,404 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 539 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:05,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:13:05,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:05,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:05,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:05,554 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:13:05,555 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:13:05,558 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:05,577 INFO L628 ElimStorePlain]: treesize reduction 53, result has 20.9 percent of original size [2021-06-05 15:13:05,577 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:05,577 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:13:05,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:05,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [898494145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:05,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:05,612 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:13:05,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479803301] [2021-06-05 15:13:05,612 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:13:05,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:05,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:13:05,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:13:05,613 INFO L87 Difference]: Start difference. First operand 3901 states and 16365 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:06,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:06,218 INFO L93 Difference]: Finished difference Result 4156 states and 17350 transitions. [2021-06-05 15:13:06,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:06,218 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:06,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:06,225 INFO L225 Difference]: With dead ends: 4156 [2021-06-05 15:13:06,225 INFO L226 Difference]: Without dead ends: 4133 [2021-06-05 15:13:06,225 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 400.1ms TimeCoverageRelationStatistics Valid=134, Invalid=922, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:06,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4133 states. [2021-06-05 15:13:06,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4133 to 3897. [2021-06-05 15:13:06,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.19635523613963) internal successors, (16349), 3896 states have internal predecessors, (16349), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:06,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16349 transitions. [2021-06-05 15:13:06,276 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16349 transitions. Word has length 23 [2021-06-05 15:13:06,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:06,276 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16349 transitions. [2021-06-05 15:13:06,276 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:06,276 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16349 transitions. [2021-06-05 15:13:06,281 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:06,281 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:06,281 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:06,482 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 539 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1176 [2021-06-05 15:13:06,482 INFO L430 AbstractCegarLoop]: === Iteration 540 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:06,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:06,482 INFO L82 PathProgramCache]: Analyzing trace with hash 577314687, now seen corresponding path program 385 times [2021-06-05 15:13:06,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:06,482 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189591813] [2021-06-05 15:13:06,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:06,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:06,563 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:06,563 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189591813] [2021-06-05 15:13:06,563 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [189591813] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:06,563 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [683822886] [2021-06-05 15:13:06,563 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 540 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:06,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:06,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:06,587 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:06,678 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:06,678 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:06,679 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:06,687 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:06,687 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:06,687 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:06,743 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:06,743 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [683822886] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:06,743 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:06,743 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:06,743 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981738421] [2021-06-05 15:13:06,743 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:06,743 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:06,743 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:06,743 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:06,743 INFO L87 Difference]: Start difference. First operand 3897 states and 16349 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:07,356 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:07,356 INFO L93 Difference]: Finished difference Result 4295 states and 17907 transitions. [2021-06-05 15:13:07,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:13:07,357 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:07,357 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:07,364 INFO L225 Difference]: With dead ends: 4295 [2021-06-05 15:13:07,364 INFO L226 Difference]: Without dead ends: 4273 [2021-06-05 15:13:07,365 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:07,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4273 states. [2021-06-05 15:13:07,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4273 to 3905. [2021-06-05 15:13:07,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.196465163934426) internal successors, (16383), 3904 states have internal predecessors, (16383), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:07,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16383 transitions. [2021-06-05 15:13:07,420 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16383 transitions. Word has length 23 [2021-06-05 15:13:07,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:07,420 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16383 transitions. [2021-06-05 15:13:07,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:07,420 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16383 transitions. [2021-06-05 15:13:07,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:07,425 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:07,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:07,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1180,540 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:07,626 INFO L430 AbstractCegarLoop]: === Iteration 541 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:07,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:07,626 INFO L82 PathProgramCache]: Analyzing trace with hash 1090841539, now seen corresponding path program 386 times [2021-06-05 15:13:07,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:07,626 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741059120] [2021-06-05 15:13:07,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:07,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:07,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:07,713 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:07,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741059120] [2021-06-05 15:13:07,713 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1741059120] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:07,713 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720432675] [2021-06-05 15:13:07,713 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 541 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:07,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:07,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:07,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:07,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:07,811 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:07,812 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:07,813 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:07,820 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:07,821 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:07,821 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:07,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:07,895 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720432675] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:07,895 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:07,895 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:07,895 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [539973992] [2021-06-05 15:13:07,896 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:07,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:07,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:07,896 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:07,896 INFO L87 Difference]: Start difference. First operand 3905 states and 16383 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:08,415 INFO L93 Difference]: Finished difference Result 4213 states and 17561 transitions. [2021-06-05 15:13:08,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:13:08,416 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:08,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:08,423 INFO L225 Difference]: With dead ends: 4213 [2021-06-05 15:13:08,423 INFO L226 Difference]: Without dead ends: 4188 [2021-06-05 15:13:08,423 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 487.8ms TimeCoverageRelationStatistics Valid=145, Invalid=611, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:13:08,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4188 states. [2021-06-05 15:13:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4188 to 3909. [2021-06-05 15:13:08,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.1962640736949846) internal successors, (16399), 3908 states have internal predecessors, (16399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16399 transitions. [2021-06-05 15:13:08,497 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16399 transitions. Word has length 23 [2021-06-05 15:13:08,497 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:08,497 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16399 transitions. [2021-06-05 15:13:08,497 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:08,497 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16399 transitions. [2021-06-05 15:13:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:08,502 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:08,502 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:08,702 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1182,541 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:08,702 INFO L430 AbstractCegarLoop]: === Iteration 542 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:08,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:08,703 INFO L82 PathProgramCache]: Analyzing trace with hash -2128414601, now seen corresponding path program 387 times [2021-06-05 15:13:08,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:08,703 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234759320] [2021-06-05 15:13:08,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:08,789 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:08,789 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:08,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234759320] [2021-06-05 15:13:08,789 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234759320] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:08,789 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267515010] [2021-06-05 15:13:08,789 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 542 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:08,812 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:08,812 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:08,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:08,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:08,887 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:08,887 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:08,888 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:08,896 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:08,896 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:08,896 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:08,969 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:08,970 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [267515010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:08,970 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:08,970 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:08,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1218093470] [2021-06-05 15:13:08,970 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:08,970 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:08,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:08,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:08,970 INFO L87 Difference]: Start difference. First operand 3909 states and 16399 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:09,607 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:09,607 INFO L93 Difference]: Finished difference Result 4215 states and 17580 transitions. [2021-06-05 15:13:09,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:13:09,607 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:09,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:09,615 INFO L225 Difference]: With dead ends: 4215 [2021-06-05 15:13:09,615 INFO L226 Difference]: Without dead ends: 4194 [2021-06-05 15:13:09,615 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 622.5ms TimeCoverageRelationStatistics Valid=181, Invalid=749, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:13:09,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4194 states. [2021-06-05 15:13:09,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4194 to 3901. [2021-06-05 15:13:09,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.196153846153846) internal successors, (16365), 3900 states have internal predecessors, (16365), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:09,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16365 transitions. [2021-06-05 15:13:09,667 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16365 transitions. Word has length 23 [2021-06-05 15:13:09,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:09,668 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16365 transitions. [2021-06-05 15:13:09,668 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:09,668 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16365 transitions. [2021-06-05 15:13:09,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:09,673 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:09,673 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:09,873 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1184,542 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:09,873 INFO L430 AbstractCegarLoop]: === Iteration 543 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:09,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:09,873 INFO L82 PathProgramCache]: Analyzing trace with hash -1957599669, now seen corresponding path program 388 times [2021-06-05 15:13:09,873 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:09,874 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745722737] [2021-06-05 15:13:09,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:09,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:09,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:09,955 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745722737] [2021-06-05 15:13:09,955 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745722737] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:09,955 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1148317316] [2021-06-05 15:13:09,955 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 543 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:09,978 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:09,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:09,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:09,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:10,072 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:10,072 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:10,073 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:10,081 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:10,082 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:10,082 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:10,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:10,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1148317316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:10,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:10,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:10,140 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072883343] [2021-06-05 15:13:10,140 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:10,140 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:10,140 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:10,140 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:10,140 INFO L87 Difference]: Start difference. First operand 3901 states and 16365 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:10,566 INFO L93 Difference]: Finished difference Result 4183 states and 17465 transitions. [2021-06-05 15:13:10,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:13:10,567 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:10,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:10,574 INFO L225 Difference]: With dead ends: 4183 [2021-06-05 15:13:10,574 INFO L226 Difference]: Without dead ends: 4160 [2021-06-05 15:13:10,574 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 366.1ms TimeCoverageRelationStatistics Valid=119, Invalid=531, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:13:10,578 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4160 states. [2021-06-05 15:13:10,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4160 to 3895. [2021-06-05 15:13:10,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 4.196456086286595) internal successors, (16341), 3894 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 16341 transitions. [2021-06-05 15:13:10,624 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 16341 transitions. Word has length 23 [2021-06-05 15:13:10,624 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:10,624 INFO L482 AbstractCegarLoop]: Abstraction has 3895 states and 16341 transitions. [2021-06-05 15:13:10,625 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:10,625 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 16341 transitions. [2021-06-05 15:13:10,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:10,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:10,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:10,830 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1186,543 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:10,830 INFO L430 AbstractCegarLoop]: === Iteration 544 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:10,830 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:10,830 INFO L82 PathProgramCache]: Analyzing trace with hash 1100599921, now seen corresponding path program 389 times [2021-06-05 15:13:10,830 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:10,830 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084625109] [2021-06-05 15:13:10,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:10,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:10,915 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:10,915 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:10,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084625109] [2021-06-05 15:13:10,915 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2084625109] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:10,915 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428279286] [2021-06-05 15:13:10,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 544 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:10,938 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:13:10,938 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:10,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:10,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:11,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:11,023 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:11,024 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:11,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:11,032 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:11,032 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:11,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:11,087 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1428279286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:11,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:11,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:11,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872504149] [2021-06-05 15:13:11,088 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:11,088 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:11,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:11,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:11,100 INFO L87 Difference]: Start difference. First operand 3895 states and 16341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:11,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:11,797 INFO L93 Difference]: Finished difference Result 4664 states and 19376 transitions. [2021-06-05 15:13:11,797 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:13:11,798 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:11,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:11,805 INFO L225 Difference]: With dead ends: 4664 [2021-06-05 15:13:11,805 INFO L226 Difference]: Without dead ends: 4642 [2021-06-05 15:13:11,806 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 545.6ms TimeCoverageRelationStatistics Valid=185, Invalid=871, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:11,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4642 states. [2021-06-05 15:13:11,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4642 to 3899. [2021-06-05 15:13:11,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.196767573114418) internal successors, (16359), 3898 states have internal predecessors, (16359), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:11,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16359 transitions. [2021-06-05 15:13:11,859 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16359 transitions. Word has length 23 [2021-06-05 15:13:11,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:11,859 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16359 transitions. [2021-06-05 15:13:11,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:11,859 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16359 transitions. [2021-06-05 15:13:11,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:11,864 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:11,864 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:12,064 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 544 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1188 [2021-06-05 15:13:12,064 INFO L430 AbstractCegarLoop]: === Iteration 545 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:12,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:12,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1614126773, now seen corresponding path program 390 times [2021-06-05 15:13:12,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:12,064 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104865637] [2021-06-05 15:13:12,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:12,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:12,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:12,155 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104865637] [2021-06-05 15:13:12,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104865637] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:12,155 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134970667] [2021-06-05 15:13:12,155 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 545 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:12,178 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:12,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:12,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:12,179 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:12,250 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:12,251 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:12,252 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:12,259 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:12,260 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:12,260 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:12,335 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:12,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134970667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:12,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:12,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:12,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1952778944] [2021-06-05 15:13:12,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:12,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:12,336 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:12,336 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:12,336 INFO L87 Difference]: Start difference. First operand 3899 states and 16359 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:12,904 INFO L93 Difference]: Finished difference Result 4543 states and 18870 transitions. [2021-06-05 15:13:12,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:13:12,904 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:12,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:12,912 INFO L225 Difference]: With dead ends: 4543 [2021-06-05 15:13:12,912 INFO L226 Difference]: Without dead ends: 4518 [2021-06-05 15:13:12,912 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 490.7ms TimeCoverageRelationStatistics Valid=163, Invalid=649, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:12,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4518 states. [2021-06-05 15:13:12,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4518 to 3903. [2021-06-05 15:13:12,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.196565863659662) internal successors, (16375), 3902 states have internal predecessors, (16375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16375 transitions. [2021-06-05 15:13:12,965 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16375 transitions. Word has length 23 [2021-06-05 15:13:12,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:12,965 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16375 transitions. [2021-06-05 15:13:12,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:12,965 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16375 transitions. [2021-06-05 15:13:12,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:12,970 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:12,970 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:13,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 545 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1190 [2021-06-05 15:13:13,171 INFO L430 AbstractCegarLoop]: === Iteration 546 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:13,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:13,171 INFO L82 PathProgramCache]: Analyzing trace with hash -1605129367, now seen corresponding path program 391 times [2021-06-05 15:13:13,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:13,171 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988327483] [2021-06-05 15:13:13,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:13,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:13,271 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:13,271 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:13,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988327483] [2021-06-05 15:13:13,271 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988327483] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:13,271 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2132706724] [2021-06-05 15:13:13,271 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 546 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:13,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:13,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:13,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:13,377 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:13,377 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:13,378 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:13,388 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:13,388 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:13,388 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:13,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:13,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2132706724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:13,475 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:13,475 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:13,475 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632383911] [2021-06-05 15:13:13,475 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:13,475 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:13,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:13,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:13,475 INFO L87 Difference]: Start difference. First operand 3903 states and 16375 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:14,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:14,302 INFO L93 Difference]: Finished difference Result 4517 states and 18778 transitions. [2021-06-05 15:13:14,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:13:14,302 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:14,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:14,310 INFO L225 Difference]: With dead ends: 4517 [2021-06-05 15:13:14,310 INFO L226 Difference]: Without dead ends: 4496 [2021-06-05 15:13:14,311 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 666.1ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:13:14,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4496 states. [2021-06-05 15:13:14,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4496 to 3895. [2021-06-05 15:13:14,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3895 states, 3894 states have (on average 4.196456086286595) internal successors, (16341), 3894 states have internal predecessors, (16341), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:14,363 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3895 states to 3895 states and 16341 transitions. [2021-06-05 15:13:14,364 INFO L78 Accepts]: Start accepts. Automaton has 3895 states and 16341 transitions. Word has length 23 [2021-06-05 15:13:14,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:14,364 INFO L482 AbstractCegarLoop]: Abstraction has 3895 states and 16341 transitions. [2021-06-05 15:13:14,364 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:14,364 INFO L276 IsEmpty]: Start isEmpty. Operand 3895 states and 16341 transitions. [2021-06-05 15:13:14,369 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:14,369 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:14,369 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:14,569 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1192,546 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:14,569 INFO L430 AbstractCegarLoop]: === Iteration 547 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:14,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:14,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1510107419, now seen corresponding path program 392 times [2021-06-05 15:13:14,569 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:14,570 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1984418652] [2021-06-05 15:13:14,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:14,571 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:14,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:14,655 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:14,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1984418652] [2021-06-05 15:13:14,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1984418652] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:14,655 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1431584256] [2021-06-05 15:13:14,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 547 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:14,678 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:14,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:14,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:14,679 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:14,761 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:14,761 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:14,762 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:14,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:14,771 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:14,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:14,829 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:14,829 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1431584256] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:14,829 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:14,829 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:14,829 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445179580] [2021-06-05 15:13:14,829 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:14,829 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:14,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:14,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:14,830 INFO L87 Difference]: Start difference. First operand 3895 states and 16341 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:15,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:15,390 INFO L93 Difference]: Finished difference Result 4588 states and 19032 transitions. [2021-06-05 15:13:15,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:13:15,391 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:15,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:15,399 INFO L225 Difference]: With dead ends: 4588 [2021-06-05 15:13:15,399 INFO L226 Difference]: Without dead ends: 4557 [2021-06-05 15:13:15,399 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 395.9ms TimeCoverageRelationStatistics Valid=152, Invalid=660, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:15,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4557 states. [2021-06-05 15:13:15,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4557 to 3893. [2021-06-05 15:13:15,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3892 states have (on average 4.195015416238438) internal successors, (16327), 3892 states have internal predecessors, (16327), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:15,451 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16327 transitions. [2021-06-05 15:13:15,451 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16327 transitions. Word has length 23 [2021-06-05 15:13:15,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:15,451 INFO L482 AbstractCegarLoop]: Abstraction has 3893 states and 16327 transitions. [2021-06-05 15:13:15,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:15,451 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16327 transitions. [2021-06-05 15:13:15,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:15,456 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:15,456 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:15,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1194,547 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:15,657 INFO L430 AbstractCegarLoop]: === Iteration 548 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:15,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:15,657 INFO L82 PathProgramCache]: Analyzing trace with hash 2097852741, now seen corresponding path program 393 times [2021-06-05 15:13:15,657 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:15,657 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396937573] [2021-06-05 15:13:15,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:15,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:15,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:15,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:15,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396937573] [2021-06-05 15:13:15,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396937573] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:15,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1767081476] [2021-06-05 15:13:15,747 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 548 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:15,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:15,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:15,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:15,773 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:15,844 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:15,844 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:15,845 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:15,853 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:15,853 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:15,853 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:15,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:15,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1767081476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:15,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:15,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:15,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082099162] [2021-06-05 15:13:15,929 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:15,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:15,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:15,929 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=270, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:15,929 INFO L87 Difference]: Start difference. First operand 3893 states and 16327 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:16,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:16,557 INFO L93 Difference]: Finished difference Result 4418 states and 18376 transitions. [2021-06-05 15:13:16,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:13:16,557 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:16,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:16,564 INFO L225 Difference]: With dead ends: 4418 [2021-06-05 15:13:16,564 INFO L226 Difference]: Without dead ends: 4393 [2021-06-05 15:13:16,564 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 487.1ms TimeCoverageRelationStatistics Valid=166, Invalid=646, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:16,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4393 states. [2021-06-05 15:13:16,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4393 to 3885. [2021-06-05 15:13:16,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3885 states, 3884 states have (on average 4.196189495365602) internal successors, (16298), 3884 states have internal predecessors, (16298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3885 states to 3885 states and 16298 transitions. [2021-06-05 15:13:16,616 INFO L78 Accepts]: Start accepts. Automaton has 3885 states and 16298 transitions. Word has length 23 [2021-06-05 15:13:16,616 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:16,616 INFO L482 AbstractCegarLoop]: Abstraction has 3885 states and 16298 transitions. [2021-06-05 15:13:16,616 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:16,616 INFO L276 IsEmpty]: Start isEmpty. Operand 3885 states and 16298 transitions. [2021-06-05 15:13:16,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:16,621 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:16,621 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:16,821 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1196,548 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:16,821 INFO L430 AbstractCegarLoop]: === Iteration 549 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:16,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:16,822 INFO L82 PathProgramCache]: Analyzing trace with hash 39821831, now seen corresponding path program 394 times [2021-06-05 15:13:16,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:16,822 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [447410052] [2021-06-05 15:13:16,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:16,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:16,905 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:16,905 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:16,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [447410052] [2021-06-05 15:13:16,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [447410052] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:16,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035098502] [2021-06-05 15:13:16,906 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 549 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:16,928 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:16,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:16,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:16,929 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:17,018 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:17,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:17,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:17,027 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:17,028 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:17,028 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:17,084 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:17,084 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2035098502] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:17,084 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:17,085 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:17,085 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1765025191] [2021-06-05 15:13:17,085 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:17,085 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:17,085 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:17,085 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:17,085 INFO L87 Difference]: Start difference. First operand 3885 states and 16298 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:17,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:17,740 INFO L93 Difference]: Finished difference Result 4472 states and 18609 transitions. [2021-06-05 15:13:17,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:13:17,740 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:17,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:17,747 INFO L225 Difference]: With dead ends: 4472 [2021-06-05 15:13:17,748 INFO L226 Difference]: Without dead ends: 4450 [2021-06-05 15:13:17,748 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 472.0ms TimeCoverageRelationStatistics Valid=156, Invalid=774, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:13:17,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-06-05 15:13:17,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3893. [2021-06-05 15:13:17,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3893 states, 3892 states have (on average 4.196300102774923) internal successors, (16332), 3892 states have internal predecessors, (16332), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:17,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3893 states to 3893 states and 16332 transitions. [2021-06-05 15:13:17,800 INFO L78 Accepts]: Start accepts. Automaton has 3893 states and 16332 transitions. Word has length 23 [2021-06-05 15:13:17,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:17,800 INFO L482 AbstractCegarLoop]: Abstraction has 3893 states and 16332 transitions. [2021-06-05 15:13:17,800 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:17,800 INFO L276 IsEmpty]: Start isEmpty. Operand 3893 states and 16332 transitions. [2021-06-05 15:13:17,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:17,805 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:17,805 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:18,005 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1198,549 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:18,006 INFO L430 AbstractCegarLoop]: === Iteration 550 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:18,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:18,006 INFO L82 PathProgramCache]: Analyzing trace with hash 553348683, now seen corresponding path program 395 times [2021-06-05 15:13:18,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:18,006 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040619832] [2021-06-05 15:13:18,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:18,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:18,096 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:18,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040619832] [2021-06-05 15:13:18,096 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040619832] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:18,096 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [151658722] [2021-06-05 15:13:18,096 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 550 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:18,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:18,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:18,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:18,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:18,195 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:18,195 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:18,196 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:18,204 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:18,204 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:18,204 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:18,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:18,281 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [151658722] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:18,281 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:18,281 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:18,281 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [986703173] [2021-06-05 15:13:18,281 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:18,281 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:18,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:18,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:18,282 INFO L87 Difference]: Start difference. First operand 3893 states and 16332 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:18,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:18,831 INFO L93 Difference]: Finished difference Result 4376 states and 18204 transitions. [2021-06-05 15:13:18,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:13:18,832 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:18,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:18,839 INFO L225 Difference]: With dead ends: 4376 [2021-06-05 15:13:18,839 INFO L226 Difference]: Without dead ends: 4351 [2021-06-05 15:13:18,839 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 513.6ms TimeCoverageRelationStatistics Valid=146, Invalid=666, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:18,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4351 states. [2021-06-05 15:13:18,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4351 to 3897. [2021-06-05 15:13:18,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3897 states, 3896 states have (on average 4.196098562628337) internal successors, (16348), 3896 states have internal predecessors, (16348), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:18,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3897 states to 3897 states and 16348 transitions. [2021-06-05 15:13:18,909 INFO L78 Accepts]: Start accepts. Automaton has 3897 states and 16348 transitions. Word has length 23 [2021-06-05 15:13:18,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:18,909 INFO L482 AbstractCegarLoop]: Abstraction has 3897 states and 16348 transitions. [2021-06-05 15:13:18,909 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:18,909 INFO L276 IsEmpty]: Start isEmpty. Operand 3897 states and 16348 transitions. [2021-06-05 15:13:18,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:18,914 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:18,914 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:19,115 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 550 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1200 [2021-06-05 15:13:19,115 INFO L430 AbstractCegarLoop]: === Iteration 551 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:19,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:19,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1629059839, now seen corresponding path program 396 times [2021-06-05 15:13:19,115 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:19,115 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818246920] [2021-06-05 15:13:19,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:19,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:19,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818246920] [2021-06-05 15:13:19,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818246920] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:19,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1367674462] [2021-06-05 15:13:19,208 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 551 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:19,231 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:19,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:19,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:19,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:19,306 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:19,307 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:19,307 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:19,315 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:19,316 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:19,316 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:19,392 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:19,392 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1367674462] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:19,392 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:19,392 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:19,392 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484570874] [2021-06-05 15:13:19,392 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:19,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:19,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:19,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=276, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:19,393 INFO L87 Difference]: Start difference. First operand 3897 states and 16348 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:20,116 INFO L93 Difference]: Finished difference Result 4345 states and 18092 transitions. [2021-06-05 15:13:20,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:20,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:20,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:20,124 INFO L225 Difference]: With dead ends: 4345 [2021-06-05 15:13:20,124 INFO L226 Difference]: Without dead ends: 4324 [2021-06-05 15:13:20,124 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 656.3ms TimeCoverageRelationStatistics Valid=191, Invalid=865, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:20,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4324 states. [2021-06-05 15:13:20,163 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4324 to 3889. [2021-06-05 15:13:20,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3889 states, 3888 states have (on average 4.195987654320987) internal successors, (16314), 3888 states have internal predecessors, (16314), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,175 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3889 states to 3889 states and 16314 transitions. [2021-06-05 15:13:20,175 INFO L78 Accepts]: Start accepts. Automaton has 3889 states and 16314 transitions. Word has length 23 [2021-06-05 15:13:20,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:20,175 INFO L482 AbstractCegarLoop]: Abstraction has 3889 states and 16314 transitions. [2021-06-05 15:13:20,175 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:20,175 INFO L276 IsEmpty]: Start isEmpty. Operand 3889 states and 16314 transitions. [2021-06-05 15:13:20,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:20,180 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:20,180 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:20,380 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 551 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1202 [2021-06-05 15:13:20,380 INFO L430 AbstractCegarLoop]: === Iteration 552 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:20,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:20,381 INFO L82 PathProgramCache]: Analyzing trace with hash 1799874771, now seen corresponding path program 397 times [2021-06-05 15:13:20,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:20,381 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460461906] [2021-06-05 15:13:20,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:20,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:20,466 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:20,466 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460461906] [2021-06-05 15:13:20,466 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [460461906] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:20,466 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1372374744] [2021-06-05 15:13:20,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 552 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:20,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:20,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:20,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:20,580 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:20,581 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:20,582 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,589 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:20,590 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:20,590 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:20,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1372374744] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:20,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:20,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:20,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1497954202] [2021-06-05 15:13:20,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:20,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:20,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:20,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:20,648 INFO L87 Difference]: Start difference. First operand 3889 states and 16314 transitions. Second operand has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:21,046 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:21,046 INFO L93 Difference]: Finished difference Result 4301 states and 17926 transitions. [2021-06-05 15:13:21,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-06-05 15:13:21,047 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:21,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:21,054 INFO L225 Difference]: With dead ends: 4301 [2021-06-05 15:13:21,054 INFO L226 Difference]: Without dead ends: 4278 [2021-06-05 15:13:21,054 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 375.3ms TimeCoverageRelationStatistics Valid=124, Invalid=578, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:13:21,058 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4278 states. [2021-06-05 15:13:21,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4278 to 3883. [2021-06-05 15:13:21,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3883 states, 3882 states have (on average 4.196805770221535) internal successors, (16292), 3882 states have internal predecessors, (16292), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:21,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3883 states to 3883 states and 16292 transitions. [2021-06-05 15:13:21,106 INFO L78 Accepts]: Start accepts. Automaton has 3883 states and 16292 transitions. Word has length 23 [2021-06-05 15:13:21,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:21,106 INFO L482 AbstractCegarLoop]: Abstraction has 3883 states and 16292 transitions. [2021-06-05 15:13:21,106 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.0526315789473686) internal successors, (39), 18 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:21,106 INFO L276 IsEmpty]: Start isEmpty. Operand 3883 states and 16292 transitions. [2021-06-05 15:13:21,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:21,111 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:21,111 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:21,311 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 552 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1204 [2021-06-05 15:13:21,311 INFO L430 AbstractCegarLoop]: === Iteration 553 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:21,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:21,312 INFO L82 PathProgramCache]: Analyzing trace with hash 879475445, now seen corresponding path program 1 times [2021-06-05 15:13:21,312 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:21,312 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010399619] [2021-06-05 15:13:21,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:21,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:21,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:21,427 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:21,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010399619] [2021-06-05 15:13:21,427 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2010399619] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:21,427 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86891402] [2021-06-05 15:13:21,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 553 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:21,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:21,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:21,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:21,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:21,566 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:21,567 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:21,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:21,575 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:21,575 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:21,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:21,637 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [86891402] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:21,637 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:21,637 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:21,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [158316532] [2021-06-05 15:13:21,637 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:21,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:21,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:21,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:21,638 INFO L87 Difference]: Start difference. First operand 3883 states and 16292 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:22,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:22,641 INFO L93 Difference]: Finished difference Result 4622 states and 19202 transitions. [2021-06-05 15:13:22,641 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:22,641 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:22,641 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:22,649 INFO L225 Difference]: With dead ends: 4622 [2021-06-05 15:13:22,649 INFO L226 Difference]: Without dead ends: 4600 [2021-06-05 15:13:22,649 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 720.2ms TimeCoverageRelationStatistics Valid=180, Invalid=812, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:22,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4600 states. [2021-06-05 15:13:22,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4600 to 3903. [2021-06-05 15:13:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3903 states, 3902 states have (on average 4.199384930804715) internal successors, (16386), 3902 states have internal predecessors, (16386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:22,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3903 states to 3903 states and 16386 transitions. [2021-06-05 15:13:22,702 INFO L78 Accepts]: Start accepts. Automaton has 3903 states and 16386 transitions. Word has length 23 [2021-06-05 15:13:22,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:22,702 INFO L482 AbstractCegarLoop]: Abstraction has 3903 states and 16386 transitions. [2021-06-05 15:13:22,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:22,702 INFO L276 IsEmpty]: Start isEmpty. Operand 3903 states and 16386 transitions. [2021-06-05 15:13:22,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:22,707 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:22,707 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:22,908 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1206,553 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:22,908 INFO L430 AbstractCegarLoop]: === Iteration 554 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:22,908 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:22,908 INFO L82 PathProgramCache]: Analyzing trace with hash 1464809397, now seen corresponding path program 2 times [2021-06-05 15:13:22,908 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:22,908 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1592442616] [2021-06-05 15:13:22,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:22,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:23,022 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:23,022 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:23,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1592442616] [2021-06-05 15:13:23,022 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1592442616] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:23,022 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1409947275] [2021-06-05 15:13:23,023 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 554 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:23,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:23,045 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:23,046 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:23,046 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:23,118 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:23,118 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:23,119 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:23,127 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:23,128 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:23,128 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:23,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:23,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1409947275] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:23,208 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:23,208 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:23,208 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175057171] [2021-06-05 15:13:23,208 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:23,208 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:23,209 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:23,209 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:23,209 INFO L87 Difference]: Start difference. First operand 3903 states and 16386 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:24,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:24,005 INFO L93 Difference]: Finished difference Result 4476 states and 18602 transitions. [2021-06-05 15:13:24,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:13:24,006 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:24,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:24,014 INFO L225 Difference]: With dead ends: 4476 [2021-06-05 15:13:24,014 INFO L226 Difference]: Without dead ends: 4450 [2021-06-05 15:13:24,014 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 720.3ms TimeCoverageRelationStatistics Valid=209, Invalid=913, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:13:24,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4450 states. [2021-06-05 15:13:24,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4450 to 3907. [2021-06-05 15:13:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3907 states, 3906 states have (on average 4.199180747567844) internal successors, (16402), 3906 states have internal predecessors, (16402), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:24,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3907 states to 3907 states and 16402 transitions. [2021-06-05 15:13:24,084 INFO L78 Accepts]: Start accepts. Automaton has 3907 states and 16402 transitions. Word has length 23 [2021-06-05 15:13:24,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:24,084 INFO L482 AbstractCegarLoop]: Abstraction has 3907 states and 16402 transitions. [2021-06-05 15:13:24,084 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:24,084 INFO L276 IsEmpty]: Start isEmpty. Operand 3907 states and 16402 transitions. [2021-06-05 15:13:24,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:24,089 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:24,089 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:24,289 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1208,554 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:24,290 INFO L430 AbstractCegarLoop]: === Iteration 555 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:24,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:24,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1216591165, now seen corresponding path program 3 times [2021-06-05 15:13:24,290 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:24,290 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320916557] [2021-06-05 15:13:24,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:24,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:24,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:24,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:24,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320916557] [2021-06-05 15:13:24,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320916557] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:24,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859925605] [2021-06-05 15:13:24,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 555 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:24,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:24,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:24,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:24,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:24,503 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:24,503 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:24,504 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:24,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:24,513 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:24,513 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:24,591 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:24,592 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859925605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:24,592 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:24,592 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:24,592 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [30076365] [2021-06-05 15:13:24,592 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:24,592 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:24,592 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:24,592 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:24,592 INFO L87 Difference]: Start difference. First operand 3907 states and 16402 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:25,611 INFO L93 Difference]: Finished difference Result 4476 states and 18602 transitions. [2021-06-05 15:13:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:13:25,611 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:25,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:25,619 INFO L225 Difference]: With dead ends: 4476 [2021-06-05 15:13:25,619 INFO L226 Difference]: Without dead ends: 4455 [2021-06-05 15:13:25,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 942.2ms TimeCoverageRelationStatistics Valid=235, Invalid=955, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:13:25,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4455 states. [2021-06-05 15:13:25,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4455 to 3899. [2021-06-05 15:13:25,663 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3899 states, 3898 states have (on average 4.199076449461262) internal successors, (16368), 3898 states have internal predecessors, (16368), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:25,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3899 states to 3899 states and 16368 transitions. [2021-06-05 15:13:25,671 INFO L78 Accepts]: Start accepts. Automaton has 3899 states and 16368 transitions. Word has length 23 [2021-06-05 15:13:25,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:25,671 INFO L482 AbstractCegarLoop]: Abstraction has 3899 states and 16368 transitions. [2021-06-05 15:13:25,671 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:25,671 INFO L276 IsEmpty]: Start isEmpty. Operand 3899 states and 16368 transitions. [2021-06-05 15:13:25,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:25,676 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:25,676 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:25,876 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 555 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1210 [2021-06-05 15:13:25,876 INFO L430 AbstractCegarLoop]: === Iteration 556 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:25,877 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:25,877 INFO L82 PathProgramCache]: Analyzing trace with hash 1228972823, now seen corresponding path program 4 times [2021-06-05 15:13:25,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:25,877 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401377095] [2021-06-05 15:13:25,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:25,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:25,987 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:25,988 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1401377095] [2021-06-05 15:13:25,988 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1401377095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:25,988 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [637341313] [2021-06-05 15:13:25,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 556 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:26,010 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:26,010 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:26,011 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:26,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:26,097 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:26,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:26,098 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:26,106 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:26,107 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:26,107 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:26,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [637341313] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:26,168 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:26,168 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:26,168 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238426224] [2021-06-05 15:13:26,168 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:26,168 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:26,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:26,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=281, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:26,169 INFO L87 Difference]: Start difference. First operand 3899 states and 16368 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:26,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:26,857 INFO L93 Difference]: Finished difference Result 4638 states and 19236 transitions. [2021-06-05 15:13:26,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:26,857 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:26,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:26,865 INFO L225 Difference]: With dead ends: 4638 [2021-06-05 15:13:26,865 INFO L226 Difference]: Without dead ends: 4608 [2021-06-05 15:13:26,865 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 580.4ms TimeCoverageRelationStatistics Valid=172, Invalid=820, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:26,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4608 states. [2021-06-05 15:13:26,906 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4608 to 3905. [2021-06-05 15:13:26,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3905 states, 3904 states have (on average 4.200819672131147) internal successors, (16400), 3904 states have internal predecessors, (16400), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:26,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3905 states to 3905 states and 16400 transitions. [2021-06-05 15:13:26,918 INFO L78 Accepts]: Start accepts. Automaton has 3905 states and 16400 transitions. Word has length 23 [2021-06-05 15:13:26,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:26,918 INFO L482 AbstractCegarLoop]: Abstraction has 3905 states and 16400 transitions. [2021-06-05 15:13:26,918 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:26,918 INFO L276 IsEmpty]: Start isEmpty. Operand 3905 states and 16400 transitions. [2021-06-05 15:13:26,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:26,923 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:26,923 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:27,123 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 556 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1212 [2021-06-05 15:13:27,123 INFO L430 AbstractCegarLoop]: === Iteration 557 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:27,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:27,123 INFO L82 PathProgramCache]: Analyzing trace with hash 1310371879, now seen corresponding path program 5 times [2021-06-05 15:13:27,124 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:27,124 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185291900] [2021-06-05 15:13:27,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:27,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:27,238 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:27,238 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:27,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185291900] [2021-06-05 15:13:27,238 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185291900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:27,238 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359557000] [2021-06-05 15:13:27,238 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 557 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:27,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:27,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:27,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:27,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:27,334 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:27,334 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:27,335 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:27,343 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:27,343 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:27,343 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:27,422 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:27,422 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1359557000] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:27,422 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:27,422 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:27,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967391486] [2021-06-05 15:13:27,423 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:27,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:27,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:27,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:27,423 INFO L87 Difference]: Start difference. First operand 3905 states and 16400 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:28,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:28,328 INFO L93 Difference]: Finished difference Result 4456 states and 18531 transitions. [2021-06-05 15:13:28,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:13:28,329 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:28,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:28,337 INFO L225 Difference]: With dead ends: 4456 [2021-06-05 15:13:28,337 INFO L226 Difference]: Without dead ends: 4430 [2021-06-05 15:13:28,337 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 742.7ms TimeCoverageRelationStatistics Valid=214, Invalid=908, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:13:28,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4430 states. [2021-06-05 15:13:28,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4430 to 3909. [2021-06-05 15:13:28,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3909 states, 3908 states have (on average 4.200614124872057) internal successors, (16416), 3908 states have internal predecessors, (16416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:28,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3909 states to 3909 states and 16416 transitions. [2021-06-05 15:13:28,389 INFO L78 Accepts]: Start accepts. Automaton has 3909 states and 16416 transitions. Word has length 23 [2021-06-05 15:13:28,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:28,389 INFO L482 AbstractCegarLoop]: Abstraction has 3909 states and 16416 transitions. [2021-06-05 15:13:28,389 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:28,389 INFO L276 IsEmpty]: Start isEmpty. Operand 3909 states and 16416 transitions. [2021-06-05 15:13:28,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:28,394 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:28,394 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:28,595 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1214,557 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:28,595 INFO L430 AbstractCegarLoop]: === Iteration 558 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:28,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash -1371028683, now seen corresponding path program 6 times [2021-06-05 15:13:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:28,595 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822570826] [2021-06-05 15:13:28,595 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:28,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:28,711 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:28,711 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:28,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822570826] [2021-06-05 15:13:28,711 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822570826] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:28,711 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375097367] [2021-06-05 15:13:28,711 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 558 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:28,734 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:28,734 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:28,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:28,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:28,840 INFO L354 Elim1Store]: treesize reduction 20, result has 67.2 percent of original size [2021-06-05 15:13:28,840 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 44 treesize of output 64 [2021-06-05 15:13:28,842 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:28,854 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:28,855 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:28,855 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:44, output treesize:48 [2021-06-05 15:13:28,921 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:28,922 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375097367] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:28,922 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:28,922 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:13:28,922 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1861297332] [2021-06-05 15:13:28,922 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:13:28,922 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:28,922 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:13:28,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:13:28,922 INFO L87 Difference]: Start difference. First operand 3909 states and 16416 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:29,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:29,710 INFO L93 Difference]: Finished difference Result 4268 states and 17776 transitions. [2021-06-05 15:13:29,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:13:29,710 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:29,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:29,717 INFO L225 Difference]: With dead ends: 4268 [2021-06-05 15:13:29,718 INFO L226 Difference]: Without dead ends: 4247 [2021-06-05 15:13:29,718 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 653.3ms TimeCoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:13:29,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4247 states. [2021-06-05 15:13:29,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4247 to 3901. [2021-06-05 15:13:29,762 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3901 states, 3900 states have (on average 4.201794871794871) internal successors, (16387), 3900 states have internal predecessors, (16387), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3901 states to 3901 states and 16387 transitions. [2021-06-05 15:13:29,770 INFO L78 Accepts]: Start accepts. Automaton has 3901 states and 16387 transitions. Word has length 23 [2021-06-05 15:13:29,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:29,770 INFO L482 AbstractCegarLoop]: Abstraction has 3901 states and 16387 transitions. [2021-06-05 15:13:29,770 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:29,770 INFO L276 IsEmpty]: Start isEmpty. Operand 3901 states and 16387 transitions. [2021-06-05 15:13:29,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:29,776 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:29,776 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:29,976 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1216,558 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:29,976 INFO L430 AbstractCegarLoop]: === Iteration 559 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:29,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:29,976 INFO L82 PathProgramCache]: Analyzing trace with hash 1004425269, now seen corresponding path program 7 times [2021-06-05 15:13:29,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:29,976 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1305913169] [2021-06-05 15:13:29,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:29,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:30,085 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:30,085 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1305913169] [2021-06-05 15:13:30,085 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1305913169] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:30,085 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502446820] [2021-06-05 15:13:30,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 559 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:30,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:30,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:30,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:30,201 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:30,201 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:30,202 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:30,210 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:30,210 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:30,210 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:30,272 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:30,273 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [502446820] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:30,273 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:30,273 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:30,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049822830] [2021-06-05 15:13:30,273 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:30,273 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:30,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:30,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:30,273 INFO L87 Difference]: Start difference. First operand 3901 states and 16387 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:30,835 INFO L93 Difference]: Finished difference Result 4386 states and 18262 transitions. [2021-06-05 15:13:30,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:13:30,835 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:30,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:30,843 INFO L225 Difference]: With dead ends: 4386 [2021-06-05 15:13:30,843 INFO L226 Difference]: Without dead ends: 4352 [2021-06-05 15:13:30,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 434.8ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:13:30,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4352 states. [2021-06-05 15:13:30,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4352 to 3912. [2021-06-05 15:13:30,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3912 states, 3911 states have (on average 4.2019943748401944) internal successors, (16434), 3911 states have internal predecessors, (16434), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3912 states to 3912 states and 16434 transitions. [2021-06-05 15:13:30,895 INFO L78 Accepts]: Start accepts. Automaton has 3912 states and 16434 transitions. Word has length 23 [2021-06-05 15:13:30,895 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:30,895 INFO L482 AbstractCegarLoop]: Abstraction has 3912 states and 16434 transitions. [2021-06-05 15:13:30,895 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:30,895 INFO L276 IsEmpty]: Start isEmpty. Operand 3912 states and 16434 transitions. [2021-06-05 15:13:30,900 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:30,900 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:30,900 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:31,100 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 559 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1220 [2021-06-05 15:13:31,100 INFO L430 AbstractCegarLoop]: === Iteration 560 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:31,101 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:31,101 INFO L82 PathProgramCache]: Analyzing trace with hash 1158862787, now seen corresponding path program 8 times [2021-06-05 15:13:31,101 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:31,101 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131528331] [2021-06-05 15:13:31,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:31,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:31,208 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:31,208 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:31,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131528331] [2021-06-05 15:13:31,208 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131528331] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:31,208 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1724862659] [2021-06-05 15:13:31,208 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 560 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:31,231 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:31,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:31,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:31,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:31,322 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:31,322 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:31,324 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:31,331 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:31,332 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:31,332 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:31,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:31,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1724862659] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:31,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:31,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:31,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005266959] [2021-06-05 15:13:31,395 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:31,395 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:31,395 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:31,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:31,395 INFO L87 Difference]: Start difference. First operand 3912 states and 16434 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:32,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:32,084 INFO L93 Difference]: Finished difference Result 4464 states and 18562 transitions. [2021-06-05 15:13:32,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:13:32,084 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:32,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:32,092 INFO L225 Difference]: With dead ends: 4464 [2021-06-05 15:13:32,092 INFO L226 Difference]: Without dead ends: 4434 [2021-06-05 15:13:32,092 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 484.3ms TimeCoverageRelationStatistics Valid=145, Invalid=725, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:13:32,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4434 states. [2021-06-05 15:13:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4434 to 3916. [2021-06-05 15:13:32,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3916 states, 3915 states have (on average 4.202298850574713) internal successors, (16452), 3915 states have internal predecessors, (16452), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:32,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3916 states to 3916 states and 16452 transitions. [2021-06-05 15:13:32,145 INFO L78 Accepts]: Start accepts. Automaton has 3916 states and 16452 transitions. Word has length 23 [2021-06-05 15:13:32,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:32,145 INFO L482 AbstractCegarLoop]: Abstraction has 3916 states and 16452 transitions. [2021-06-05 15:13:32,145 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:32,145 INFO L276 IsEmpty]: Start isEmpty. Operand 3916 states and 16452 transitions. [2021-06-05 15:13:32,151 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:32,151 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:32,151 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:32,351 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 560 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1222 [2021-06-05 15:13:32,351 INFO L430 AbstractCegarLoop]: === Iteration 561 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:32,351 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:32,351 INFO L82 PathProgramCache]: Analyzing trace with hash 1240261843, now seen corresponding path program 9 times [2021-06-05 15:13:32,351 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:32,352 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620991853] [2021-06-05 15:13:32,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:32,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:32,464 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:32,464 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620991853] [2021-06-05 15:13:32,464 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [620991853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:32,464 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446193777] [2021-06-05 15:13:32,464 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 561 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:32,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:32,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:32,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:32,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:32,565 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:32,565 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:32,566 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:32,574 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:32,574 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:32,574 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:32,655 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:32,655 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [446193777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:32,655 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:32,655 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:32,656 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296238791] [2021-06-05 15:13:32,656 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:32,656 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:32,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:32,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:32,656 INFO L87 Difference]: Start difference. First operand 3916 states and 16452 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:33,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:33,355 INFO L93 Difference]: Finished difference Result 4328 states and 18029 transitions. [2021-06-05 15:13:33,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:13:33,355 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:33,355 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:33,363 INFO L225 Difference]: With dead ends: 4328 [2021-06-05 15:13:33,363 INFO L226 Difference]: Without dead ends: 4302 [2021-06-05 15:13:33,363 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 652.8ms TimeCoverageRelationStatistics Valid=167, Invalid=763, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:13:33,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4302 states. [2021-06-05 15:13:33,404 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4302 to 3920. [2021-06-05 15:13:33,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3920 states, 3919 states have (on average 4.20209237050268) internal successors, (16468), 3919 states have internal predecessors, (16468), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3920 states to 3920 states and 16468 transitions. [2021-06-05 15:13:33,416 INFO L78 Accepts]: Start accepts. Automaton has 3920 states and 16468 transitions. Word has length 23 [2021-06-05 15:13:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:33,416 INFO L482 AbstractCegarLoop]: Abstraction has 3920 states and 16468 transitions. [2021-06-05 15:13:33,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 3920 states and 16468 transitions. [2021-06-05 15:13:33,422 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:33,422 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:33,422 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:33,622 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1224,561 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:33,622 INFO L430 AbstractCegarLoop]: === Iteration 562 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:33,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:33,623 INFO L82 PathProgramCache]: Analyzing trace with hash -1441138719, now seen corresponding path program 10 times [2021-06-05 15:13:33,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:33,623 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493028469] [2021-06-05 15:13:33,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:33,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:33,735 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:33,735 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:33,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493028469] [2021-06-05 15:13:33,736 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1493028469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:33,736 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018983339] [2021-06-05 15:13:33,736 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 562 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:33,758 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:33,759 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:33,837 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:33,838 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:33,838 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:33,846 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:33,847 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:33,847 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:33,927 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:33,927 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1018983339] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:33,927 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:33,927 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:33,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668644557] [2021-06-05 15:13:33,927 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:33,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:33,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:33,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:33,928 INFO L87 Difference]: Start difference. First operand 3920 states and 16468 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:34,843 INFO L93 Difference]: Finished difference Result 4339 states and 18070 transitions. [2021-06-05 15:13:34,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:13:34,843 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:34,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:34,850 INFO L225 Difference]: With dead ends: 4339 [2021-06-05 15:13:34,850 INFO L226 Difference]: Without dead ends: 4318 [2021-06-05 15:13:34,850 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 783.6ms TimeCoverageRelationStatistics Valid=171, Invalid=759, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:13:34,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4318 states. [2021-06-05 15:13:34,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4318 to 3910. [2021-06-05 15:13:34,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3910 states, 3909 states have (on average 4.202609363008442) internal successors, (16428), 3909 states have internal predecessors, (16428), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3910 states to 3910 states and 16428 transitions. [2021-06-05 15:13:34,904 INFO L78 Accepts]: Start accepts. Automaton has 3910 states and 16428 transitions. Word has length 23 [2021-06-05 15:13:34,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:34,904 INFO L482 AbstractCegarLoop]: Abstraction has 3910 states and 16428 transitions. [2021-06-05 15:13:34,904 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:34,904 INFO L276 IsEmpty]: Start isEmpty. Operand 3910 states and 16428 transitions. [2021-06-05 15:13:34,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:34,909 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:34,909 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:35,109 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 562 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1226 [2021-06-05 15:13:35,109 INFO L430 AbstractCegarLoop]: === Iteration 563 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:35,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:35,110 INFO L82 PathProgramCache]: Analyzing trace with hash 1998744343, now seen corresponding path program 11 times [2021-06-05 15:13:35,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:35,110 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406668602] [2021-06-05 15:13:35,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:35,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:35,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:35,211 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:35,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406668602] [2021-06-05 15:13:35,211 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406668602] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:35,211 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [764050058] [2021-06-05 15:13:35,211 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 563 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:35,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:13:35,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:35,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:35,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:35,330 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:35,331 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:35,332 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:35,339 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:35,340 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:35,340 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:35,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:35,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [764050058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:35,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:35,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:35,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1667726739] [2021-06-05 15:13:35,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:35,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:35,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:35,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:35,404 INFO L87 Difference]: Start difference. First operand 3910 states and 16428 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:35,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:35,942 INFO L93 Difference]: Finished difference Result 4321 states and 18000 transitions. [2021-06-05 15:13:35,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:13:35,943 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:35,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:35,950 INFO L225 Difference]: With dead ends: 4321 [2021-06-05 15:13:35,950 INFO L226 Difference]: Without dead ends: 4312 [2021-06-05 15:13:35,950 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 470.4ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:13:35,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4312 states. [2021-06-05 15:13:35,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4312 to 3941. [2021-06-05 15:13:35,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3941 states, 3940 states have (on average 4.20761421319797) internal successors, (16578), 3940 states have internal predecessors, (16578), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:36,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3941 states to 3941 states and 16578 transitions. [2021-06-05 15:13:36,003 INFO L78 Accepts]: Start accepts. Automaton has 3941 states and 16578 transitions. Word has length 23 [2021-06-05 15:13:36,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:36,003 INFO L482 AbstractCegarLoop]: Abstraction has 3941 states and 16578 transitions. [2021-06-05 15:13:36,003 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:36,003 INFO L276 IsEmpty]: Start isEmpty. Operand 3941 states and 16578 transitions. [2021-06-05 15:13:36,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:36,008 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:36,008 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:36,208 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1228,563 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:36,208 INFO L430 AbstractCegarLoop]: === Iteration 564 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:36,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:36,209 INFO L82 PathProgramCache]: Analyzing trace with hash -1381141465, now seen corresponding path program 12 times [2021-06-05 15:13:36,209 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:36,209 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208176513] [2021-06-05 15:13:36,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:36,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:36,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:36,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:36,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208176513] [2021-06-05 15:13:36,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208176513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:36,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617903929] [2021-06-05 15:13:36,311 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 564 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:36,335 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:13:36,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:36,336 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 32 conjunts are in the unsatisfiable core [2021-06-05 15:13:36,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:36,476 INFO L354 Elim1Store]: treesize reduction 10, result has 81.8 percent of original size [2021-06-05 15:13:36,477 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 22 treesize of output 56 [2021-06-05 15:13:36,486 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:13:36,553 INFO L628 ElimStorePlain]: treesize reduction 61, result has 55.5 percent of original size [2021-06-05 15:13:36,554 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:36,554 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:76 [2021-06-05 15:13:36,671 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:36,671 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [617903929] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:36,671 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:36,671 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:13:36,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589501796] [2021-06-05 15:13:36,671 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:13:36,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:36,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:13:36,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=332, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:13:36,671 INFO L87 Difference]: Start difference. First operand 3941 states and 16578 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:36,910 WARN L205 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 63 DAG size of output: 49 [2021-06-05 15:13:37,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:37,729 INFO L93 Difference]: Finished difference Result 4315 states and 18017 transitions. [2021-06-05 15:13:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:13:37,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:37,737 INFO L225 Difference]: With dead ends: 4315 [2021-06-05 15:13:37,737 INFO L226 Difference]: Without dead ends: 4306 [2021-06-05 15:13:37,737 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 865.0ms TimeCoverageRelationStatistics Valid=128, Invalid=928, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:37,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4306 states. [2021-06-05 15:13:37,778 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4306 to 3945. [2021-06-05 15:13:37,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3945 states, 3944 states have (on average 4.2074036511156185) internal successors, (16594), 3944 states have internal predecessors, (16594), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:37,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3945 states to 3945 states and 16594 transitions. [2021-06-05 15:13:37,790 INFO L78 Accepts]: Start accepts. Automaton has 3945 states and 16594 transitions. Word has length 23 [2021-06-05 15:13:37,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:37,791 INFO L482 AbstractCegarLoop]: Abstraction has 3945 states and 16594 transitions. [2021-06-05 15:13:37,791 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:37,791 INFO L276 IsEmpty]: Start isEmpty. Operand 3945 states and 16594 transitions. [2021-06-05 15:13:37,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:37,796 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:37,796 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:37,996 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1230,564 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:37,996 INFO L430 AbstractCegarLoop]: === Iteration 565 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:37,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:37,996 INFO L82 PathProgramCache]: Analyzing trace with hash -1226703947, now seen corresponding path program 13 times [2021-06-05 15:13:37,996 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:37,996 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42518329] [2021-06-05 15:13:37,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:37,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:38,098 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:38,098 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:38,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42518329] [2021-06-05 15:13:38,098 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42518329] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:38,098 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1438173581] [2021-06-05 15:13:38,098 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 565 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:38,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:38,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:38,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:38,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:38,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:38,217 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:38,224 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:38,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:38,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:38,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1438173581] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:38,287 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:38,287 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:38,287 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752863101] [2021-06-05 15:13:38,287 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:38,287 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:38,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:38,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:38,287 INFO L87 Difference]: Start difference. First operand 3945 states and 16594 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:38,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:38,957 INFO L93 Difference]: Finished difference Result 4385 states and 18284 transitions. [2021-06-05 15:13:38,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:13:38,958 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:38,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:38,965 INFO L225 Difference]: With dead ends: 4385 [2021-06-05 15:13:38,965 INFO L226 Difference]: Without dead ends: 4376 [2021-06-05 15:13:38,965 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 536.7ms TimeCoverageRelationStatistics Valid=161, Invalid=831, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:38,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4376 states. [2021-06-05 15:13:39,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4376 to 3968. [2021-06-05 15:13:39,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.206705318880767) internal successors, (16688), 3967 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,021 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16688 transitions. [2021-06-05 15:13:39,021 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16688 transitions. Word has length 23 [2021-06-05 15:13:39,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:39,021 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 16688 transitions. [2021-06-05 15:13:39,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:39,021 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16688 transitions. [2021-06-05 15:13:39,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:39,026 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:39,026 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:39,227 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1235,565 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:39,227 INFO L430 AbstractCegarLoop]: === Iteration 566 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:39,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:39,227 INFO L82 PathProgramCache]: Analyzing trace with hash -1145304891, now seen corresponding path program 14 times [2021-06-05 15:13:39,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:39,227 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2135221932] [2021-06-05 15:13:39,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:39,332 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:39,332 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:39,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2135221932] [2021-06-05 15:13:39,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2135221932] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:39,333 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650494368] [2021-06-05 15:13:39,333 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 566 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:39,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:39,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:39,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:39,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:39,443 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:39,443 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:39,444 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:39,452 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:39,452 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:39,453 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:39,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:39,534 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1650494368] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:39,534 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:39,534 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:39,534 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313251609] [2021-06-05 15:13:39,534 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:39,534 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:39,534 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:39,534 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:39,534 INFO L87 Difference]: Start difference. First operand 3968 states and 16688 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:40,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:40,393 INFO L93 Difference]: Finished difference Result 4260 states and 17798 transitions. [2021-06-05 15:13:40,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:40,393 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:40,393 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:40,400 INFO L225 Difference]: With dead ends: 4260 [2021-06-05 15:13:40,400 INFO L226 Difference]: Without dead ends: 4251 [2021-06-05 15:13:40,400 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 738.2ms TimeCoverageRelationStatistics Valid=198, Invalid=924, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:13:40,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4251 states. [2021-06-05 15:13:40,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4251 to 3972. [2021-06-05 15:13:40,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3972 states, 3971 states have (on average 4.206497104004029) internal successors, (16704), 3971 states have internal predecessors, (16704), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:40,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3972 states to 3972 states and 16704 transitions. [2021-06-05 15:13:40,452 INFO L78 Accepts]: Start accepts. Automaton has 3972 states and 16704 transitions. Word has length 23 [2021-06-05 15:13:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:40,453 INFO L482 AbstractCegarLoop]: Abstraction has 3972 states and 16704 transitions. [2021-06-05 15:13:40,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:40,453 INFO L276 IsEmpty]: Start isEmpty. Operand 3972 states and 16704 transitions. [2021-06-05 15:13:40,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:40,458 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:40,458 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:40,658 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 566 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1237 [2021-06-05 15:13:40,658 INFO L430 AbstractCegarLoop]: === Iteration 567 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:40,658 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:40,658 INFO L82 PathProgramCache]: Analyzing trace with hash 468261843, now seen corresponding path program 15 times [2021-06-05 15:13:40,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:40,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763558129] [2021-06-05 15:13:40,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:40,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:40,763 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:40,764 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:40,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763558129] [2021-06-05 15:13:40,764 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763558129] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:40,764 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1925507074] [2021-06-05 15:13:40,764 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 567 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:40,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:13:40,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:40,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:40,788 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:40,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:40,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:40,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:40,876 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:40,876 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:40,876 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:40,957 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1925507074] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:40,957 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:40,957 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:13:40,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232747484] [2021-06-05 15:13:40,958 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:40,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:40,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:40,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:40,958 INFO L87 Difference]: Start difference. First operand 3972 states and 16704 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:41,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:41,949 INFO L93 Difference]: Finished difference Result 4233 states and 17674 transitions. [2021-06-05 15:13:41,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:13:41,950 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:41,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:41,957 INFO L225 Difference]: With dead ends: 4233 [2021-06-05 15:13:41,957 INFO L226 Difference]: Without dead ends: 4222 [2021-06-05 15:13:41,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 821.4ms TimeCoverageRelationStatistics Valid=182, Invalid=810, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:41,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4222 states. [2021-06-05 15:13:41,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4222 to 3968. [2021-06-05 15:13:42,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 3968 states, 3967 states have (on average 4.206705318880767) internal successors, (16688), 3967 states have internal predecessors, (16688), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:42,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3968 states to 3968 states and 16688 transitions. [2021-06-05 15:13:42,009 INFO L78 Accepts]: Start accepts. Automaton has 3968 states and 16688 transitions. Word has length 23 [2021-06-05 15:13:42,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:42,009 INFO L482 AbstractCegarLoop]: Abstraction has 3968 states and 16688 transitions. [2021-06-05 15:13:42,009 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:42,009 INFO L276 IsEmpty]: Start isEmpty. Operand 3968 states and 16688 transitions. [2021-06-05 15:13:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:42,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:42,015 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:42,215 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1239,567 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:42,215 INFO L430 AbstractCegarLoop]: === Iteration 568 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:42,215 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:42,215 INFO L82 PathProgramCache]: Analyzing trace with hash 570192243, now seen corresponding path program 1 times [2021-06-05 15:13:42,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:42,215 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [53032018] [2021-06-05 15:13:42,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:42,217 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:42,295 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:42,295 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [53032018] [2021-06-05 15:13:42,295 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [53032018] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:42,295 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414317276] [2021-06-05 15:13:42,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 568 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:42,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:42,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:42,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:42,419 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:42,420 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:42,421 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:42,428 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:42,429 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:42,429 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:42,489 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:42,489 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [414317276] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:42,490 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:42,490 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:42,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248864568] [2021-06-05 15:13:42,490 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:42,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:42,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:42,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:42,490 INFO L87 Difference]: Start difference. First operand 3968 states and 16688 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:43,245 INFO L93 Difference]: Finished difference Result 5405 states and 22414 transitions. [2021-06-05 15:13:43,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:13:43,245 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:43,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:43,257 INFO L225 Difference]: With dead ends: 5405 [2021-06-05 15:13:43,257 INFO L226 Difference]: Without dead ends: 5361 [2021-06-05 15:13:43,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 506.8ms TimeCoverageRelationStatistics Valid=152, Invalid=904, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:43,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5361 states. [2021-06-05 15:13:43,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5361 to 4028. [2021-06-05 15:13:43,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4028 states, 4027 states have (on average 4.215545070772287) internal successors, (16976), 4027 states have internal predecessors, (16976), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4028 states to 4028 states and 16976 transitions. [2021-06-05 15:13:43,323 INFO L78 Accepts]: Start accepts. Automaton has 4028 states and 16976 transitions. Word has length 23 [2021-06-05 15:13:43,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:43,323 INFO L482 AbstractCegarLoop]: Abstraction has 4028 states and 16976 transitions. [2021-06-05 15:13:43,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:43,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4028 states and 16976 transitions. [2021-06-05 15:13:43,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:43,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:43,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:43,529 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1241,568 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:43,529 INFO L430 AbstractCegarLoop]: === Iteration 569 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:43,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:43,529 INFO L82 PathProgramCache]: Analyzing trace with hash 1155526195, now seen corresponding path program 2 times [2021-06-05 15:13:43,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:43,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609347924] [2021-06-05 15:13:43,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:43,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:43,618 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:43,618 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:43,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609347924] [2021-06-05 15:13:43,618 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609347924] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,618 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839683685] [2021-06-05 15:13:43,618 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 569 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:43,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:43,641 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:43,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:43,641 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:43,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:43,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:43,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:43,738 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:43,738 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:43,738 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:43,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:43,820 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [839683685] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:43,820 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:43,820 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:43,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699465108] [2021-06-05 15:13:43,821 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:43,821 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:43,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:43,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:43,821 INFO L87 Difference]: Start difference. First operand 4028 states and 16976 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:44,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:44,668 INFO L93 Difference]: Finished difference Result 5250 states and 21765 transitions. [2021-06-05 15:13:44,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:13:44,669 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:44,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:44,678 INFO L225 Difference]: With dead ends: 5250 [2021-06-05 15:13:44,678 INFO L226 Difference]: Without dead ends: 5198 [2021-06-05 15:13:44,678 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:13:44,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-06-05 15:13:44,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4094. [2021-06-05 15:13:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4094 states, 4093 states have (on average 4.219643293427803) internal successors, (17271), 4093 states have internal predecessors, (17271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:44,736 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4094 states to 4094 states and 17271 transitions. [2021-06-05 15:13:44,736 INFO L78 Accepts]: Start accepts. Automaton has 4094 states and 17271 transitions. Word has length 23 [2021-06-05 15:13:44,736 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:44,736 INFO L482 AbstractCegarLoop]: Abstraction has 4094 states and 17271 transitions. [2021-06-05 15:13:44,736 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:44,736 INFO L276 IsEmpty]: Start isEmpty. Operand 4094 states and 17271 transitions. [2021-06-05 15:13:44,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:44,742 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:44,742 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:44,942 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 569 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1243 [2021-06-05 15:13:44,942 INFO L430 AbstractCegarLoop]: === Iteration 570 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:44,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:44,942 INFO L82 PathProgramCache]: Analyzing trace with hash -1525874367, now seen corresponding path program 3 times [2021-06-05 15:13:44,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:44,942 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [834124285] [2021-06-05 15:13:44,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:44,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:45,033 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:45,033 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [834124285] [2021-06-05 15:13:45,033 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [834124285] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:45,033 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [477428428] [2021-06-05 15:13:45,033 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 570 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:45,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:13:45,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:45,056 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:45,057 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:45,144 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:45,145 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:45,146 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:45,153 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:45,154 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:45,154 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:45,261 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:45,261 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [477428428] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:45,261 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:45,261 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:45,261 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746931267] [2021-06-05 15:13:45,261 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:45,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:45,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:45,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:45,261 INFO L87 Difference]: Start difference. First operand 4094 states and 17271 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:45,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:45,954 INFO L93 Difference]: Finished difference Result 5166 states and 21474 transitions. [2021-06-05 15:13:45,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:13:45,954 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:45,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:45,964 INFO L225 Difference]: With dead ends: 5166 [2021-06-05 15:13:45,964 INFO L226 Difference]: Without dead ends: 5124 [2021-06-05 15:13:45,964 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 584.5ms TimeCoverageRelationStatistics Valid=154, Invalid=838, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:45,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5124 states. [2021-06-05 15:13:46,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5124 to 4146. [2021-06-05 15:13:46,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4146 states, 4145 states have (on average 4.222677925211098) internal successors, (17503), 4145 states have internal predecessors, (17503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4146 states to 4146 states and 17503 transitions. [2021-06-05 15:13:46,023 INFO L78 Accepts]: Start accepts. Automaton has 4146 states and 17503 transitions. Word has length 23 [2021-06-05 15:13:46,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:46,023 INFO L482 AbstractCegarLoop]: Abstraction has 4146 states and 17503 transitions. [2021-06-05 15:13:46,023 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:46,023 INFO L276 IsEmpty]: Start isEmpty. Operand 4146 states and 17503 transitions. [2021-06-05 15:13:46,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:46,029 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:46,029 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:46,229 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 570 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1245 [2021-06-05 15:13:46,229 INFO L430 AbstractCegarLoop]: === Iteration 571 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:46,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:46,229 INFO L82 PathProgramCache]: Analyzing trace with hash 919689621, now seen corresponding path program 4 times [2021-06-05 15:13:46,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:46,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186384576] [2021-06-05 15:13:46,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:46,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:46,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:46,309 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:46,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186384576] [2021-06-05 15:13:46,309 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186384576] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:46,309 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051607216] [2021-06-05 15:13:46,309 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 571 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:46,331 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:46,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:46,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:46,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:46,427 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:46,427 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:46,428 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:46,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:46,436 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:46,436 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:46,498 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051607216] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:46,498 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:46,498 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:46,498 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628617916] [2021-06-05 15:13:46,498 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:46,498 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:46,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:46,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:46,499 INFO L87 Difference]: Start difference. First operand 4146 states and 17503 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:47,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:47,277 INFO L93 Difference]: Finished difference Result 5533 states and 22929 transitions. [2021-06-05 15:13:47,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:13:47,277 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:47,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:47,287 INFO L225 Difference]: With dead ends: 5533 [2021-06-05 15:13:47,287 INFO L226 Difference]: Without dead ends: 5472 [2021-06-05 15:13:47,287 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 564.5ms TimeCoverageRelationStatistics Valid=180, Invalid=1080, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:13:47,292 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5472 states. [2021-06-05 15:13:47,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5472 to 4158. [2021-06-05 15:13:47,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4158 states, 4157 states have (on average 4.223237911955738) internal successors, (17556), 4157 states have internal predecessors, (17556), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:47,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4158 states to 4158 states and 17556 transitions. [2021-06-05 15:13:47,349 INFO L78 Accepts]: Start accepts. Automaton has 4158 states and 17556 transitions. Word has length 23 [2021-06-05 15:13:47,349 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:47,349 INFO L482 AbstractCegarLoop]: Abstraction has 4158 states and 17556 transitions. [2021-06-05 15:13:47,349 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:47,349 INFO L276 IsEmpty]: Start isEmpty. Operand 4158 states and 17556 transitions. [2021-06-05 15:13:47,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:47,354 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:47,354 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:47,554 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 571 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1247 [2021-06-05 15:13:47,555 INFO L430 AbstractCegarLoop]: === Iteration 572 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:47,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:47,555 INFO L82 PathProgramCache]: Analyzing trace with hash 1001088677, now seen corresponding path program 5 times [2021-06-05 15:13:47,555 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:47,555 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2038042721] [2021-06-05 15:13:47,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:47,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:47,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:47,644 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2038042721] [2021-06-05 15:13:47,644 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2038042721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:47,644 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610427308] [2021-06-05 15:13:47,644 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 572 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:47,667 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:47,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:47,668 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:47,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:47,755 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:47,755 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:47,756 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:47,762 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:47,763 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:47,763 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 15:13:47,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:47,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [610427308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:47,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:47,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:47,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475693313] [2021-06-05 15:13:47,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:47,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:47,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:47,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:47,853 INFO L87 Difference]: Start difference. First operand 4158 states and 17556 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:48,575 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:48,575 INFO L93 Difference]: Finished difference Result 4985 states and 20747 transitions. [2021-06-05 15:13:48,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:13:48,575 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:48,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:48,584 INFO L225 Difference]: With dead ends: 4985 [2021-06-05 15:13:48,584 INFO L226 Difference]: Without dead ends: 4933 [2021-06-05 15:13:48,584 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 495.9ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:13:48,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4933 states. [2021-06-05 15:13:48,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4933 to 4160. [2021-06-05 15:13:48,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4160 states, 4159 states have (on average 4.224092329886992) internal successors, (17568), 4159 states have internal predecessors, (17568), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:48,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4160 states to 4160 states and 17568 transitions. [2021-06-05 15:13:48,642 INFO L78 Accepts]: Start accepts. Automaton has 4160 states and 17568 transitions. Word has length 23 [2021-06-05 15:13:48,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:48,642 INFO L482 AbstractCegarLoop]: Abstraction has 4160 states and 17568 transitions. [2021-06-05 15:13:48,642 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:48,642 INFO L276 IsEmpty]: Start isEmpty. Operand 4160 states and 17568 transitions. [2021-06-05 15:13:48,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:48,647 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:48,647 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:48,847 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 572 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1249 [2021-06-05 15:13:48,848 INFO L430 AbstractCegarLoop]: === Iteration 573 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:48,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:48,848 INFO L82 PathProgramCache]: Analyzing trace with hash -1680311885, now seen corresponding path program 6 times [2021-06-05 15:13:48,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:48,848 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498979785] [2021-06-05 15:13:48,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:48,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:48,936 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:48,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498979785] [2021-06-05 15:13:48,936 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1498979785] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:48,936 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158075226] [2021-06-05 15:13:48,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 573 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:48,960 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:48,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:48,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:48,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:49,048 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:49,048 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:49,049 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:49,057 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:49,057 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:49,057 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:49,138 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:49,139 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158075226] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:49,139 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:49,139 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:49,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663859262] [2021-06-05 15:13:49,139 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:49,139 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:49,139 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:49,139 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:49,139 INFO L87 Difference]: Start difference. First operand 4160 states and 17568 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:49,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:49,810 INFO L93 Difference]: Finished difference Result 5108 states and 21253 transitions. [2021-06-05 15:13:49,811 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:49,811 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:49,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:49,819 INFO L225 Difference]: With dead ends: 5108 [2021-06-05 15:13:49,819 INFO L226 Difference]: Without dead ends: 5066 [2021-06-05 15:13:49,820 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 549.3ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:13:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5066 states. [2021-06-05 15:13:49,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5066 to 4164. [2021-06-05 15:13:49,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4164 states, 4163 states have (on average 4.223877011770358) internal successors, (17584), 4163 states have internal predecessors, (17584), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:49,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4164 states to 4164 states and 17584 transitions. [2021-06-05 15:13:49,880 INFO L78 Accepts]: Start accepts. Automaton has 4164 states and 17584 transitions. Word has length 23 [2021-06-05 15:13:49,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:49,880 INFO L482 AbstractCegarLoop]: Abstraction has 4164 states and 17584 transitions. [2021-06-05 15:13:49,880 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:49,880 INFO L276 IsEmpty]: Start isEmpty. Operand 4164 states and 17584 transitions. [2021-06-05 15:13:49,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:49,886 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:49,886 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:50,086 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1250,573 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:50,086 INFO L430 AbstractCegarLoop]: === Iteration 574 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:50,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:50,086 INFO L82 PathProgramCache]: Analyzing trace with hash 413446001, now seen corresponding path program 1 times [2021-06-05 15:13:50,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:50,086 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [449507151] [2021-06-05 15:13:50,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:50,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:50,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:50,166 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [449507151] [2021-06-05 15:13:50,166 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [449507151] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:50,166 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2143911208] [2021-06-05 15:13:50,166 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 574 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:50,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:50,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:50,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:50,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:50,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:50,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:50,300 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:50,301 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:50,301 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:50,394 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:50,394 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2143911208] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:50,394 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:50,394 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:50,394 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [420521988] [2021-06-05 15:13:50,394 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:50,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:50,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:50,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:50,394 INFO L87 Difference]: Start difference. First operand 4164 states and 17584 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:51,105 INFO L93 Difference]: Finished difference Result 5900 states and 24455 transitions. [2021-06-05 15:13:51,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:13:51,105 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:51,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:51,115 INFO L225 Difference]: With dead ends: 5900 [2021-06-05 15:13:51,116 INFO L226 Difference]: Without dead ends: 5852 [2021-06-05 15:13:51,116 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 205 ImplicationChecksByTransitivity, 565.4ms TimeCoverageRelationStatistics Valid=161, Invalid=961, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:13:51,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5852 states. [2021-06-05 15:13:51,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5852 to 4252. [2021-06-05 15:13:51,169 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4252 states, 4251 states have (on average 4.235474006116208) internal successors, (18005), 4251 states have internal predecessors, (18005), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4252 states to 4252 states and 18005 transitions. [2021-06-05 15:13:51,179 INFO L78 Accepts]: Start accepts. Automaton has 4252 states and 18005 transitions. Word has length 23 [2021-06-05 15:13:51,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:51,179 INFO L482 AbstractCegarLoop]: Abstraction has 4252 states and 18005 transitions. [2021-06-05 15:13:51,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:51,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4252 states and 18005 transitions. [2021-06-05 15:13:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:51,185 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:51,185 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:51,385 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1252,574 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:51,385 INFO L430 AbstractCegarLoop]: === Iteration 575 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:51,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:51,386 INFO L82 PathProgramCache]: Analyzing trace with hash 926972853, now seen corresponding path program 2 times [2021-06-05 15:13:51,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:51,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208524763] [2021-06-05 15:13:51,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:51,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:51,475 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:51,475 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:51,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208524763] [2021-06-05 15:13:51,475 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208524763] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:51,475 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762546144] [2021-06-05 15:13:51,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 575 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:51,498 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:51,498 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:51,499 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:51,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:51,582 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:51,583 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:51,584 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:51,591 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:51,592 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:51,592 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:51,672 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:51,673 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762546144] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:51,673 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:51,673 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:51,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358548999] [2021-06-05 15:13:51,673 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:51,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:51,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:51,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:51,673 INFO L87 Difference]: Start difference. First operand 4252 states and 18005 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,343 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:52,344 INFO L93 Difference]: Finished difference Result 5525 states and 23009 transitions. [2021-06-05 15:13:52,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:13:52,344 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:52,344 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:52,353 INFO L225 Difference]: With dead ends: 5525 [2021-06-05 15:13:52,353 INFO L226 Difference]: Without dead ends: 5469 [2021-06-05 15:13:52,354 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 194 ImplicationChecksByTransitivity, 577.6ms TimeCoverageRelationStatistics Valid=166, Invalid=890, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:52,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5469 states. [2021-06-05 15:13:52,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5469 to 4336. [2021-06-05 15:13:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4336 states, 4335 states have (on average 4.242214532871972) internal successors, (18390), 4335 states have internal predecessors, (18390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4336 states to 4336 states and 18390 transitions. [2021-06-05 15:13:52,420 INFO L78 Accepts]: Start accepts. Automaton has 4336 states and 18390 transitions. Word has length 23 [2021-06-05 15:13:52,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:52,420 INFO L482 AbstractCegarLoop]: Abstraction has 4336 states and 18390 transitions. [2021-06-05 15:13:52,420 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:52,420 INFO L276 IsEmpty]: Start isEmpty. Operand 4336 states and 18390 transitions. [2021-06-05 15:13:52,426 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:52,426 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:52,426 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:52,626 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 575 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1254 [2021-06-05 15:13:52,627 INFO L430 AbstractCegarLoop]: === Iteration 576 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:52,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:52,627 INFO L82 PathProgramCache]: Analyzing trace with hash 2002684009, now seen corresponding path program 3 times [2021-06-05 15:13:52,627 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:52,627 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633701084] [2021-06-05 15:13:52,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:52,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:52,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:52,716 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:52,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633701084] [2021-06-05 15:13:52,716 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1633701084] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:52,716 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2070178040] [2021-06-05 15:13:52,716 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 576 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:52,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:13:52,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:52,740 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:13:52,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:52,829 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:52,829 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 21 treesize of output 29 [2021-06-05 15:13:52,830 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:52,865 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:52,866 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:52,866 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:23 [2021-06-05 15:13:52,928 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:52,928 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2070178040] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:52,928 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:52,928 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:52,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620786075] [2021-06-05 15:13:52,928 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:52,928 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:52,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:52,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=293, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:52,929 INFO L87 Difference]: Start difference. First operand 4336 states and 18390 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:53,618 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:53,618 INFO L93 Difference]: Finished difference Result 5447 states and 22729 transitions. [2021-06-05 15:13:53,619 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:13:53,619 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:53,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:53,628 INFO L225 Difference]: With dead ends: 5447 [2021-06-05 15:13:53,628 INFO L226 Difference]: Without dead ends: 5401 [2021-06-05 15:13:53,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 497.6ms TimeCoverageRelationStatistics Valid=146, Invalid=910, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:13:53,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5401 states. [2021-06-05 15:13:53,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5401 to 4412. [2021-06-05 15:13:53,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4412 states, 4411 states have (on average 4.2443890274314215) internal successors, (18722), 4411 states have internal predecessors, (18722), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:53,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4412 states to 4412 states and 18722 transitions. [2021-06-05 15:13:53,690 INFO L78 Accepts]: Start accepts. Automaton has 4412 states and 18722 transitions. Word has length 23 [2021-06-05 15:13:53,690 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:53,690 INFO L482 AbstractCegarLoop]: Abstraction has 4412 states and 18722 transitions. [2021-06-05 15:13:53,690 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:53,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4412 states and 18722 transitions. [2021-06-05 15:13:53,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:53,696 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:53,696 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:53,896 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 576 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1256 [2021-06-05 15:13:53,897 INFO L430 AbstractCegarLoop]: === Iteration 577 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:53,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:53,897 INFO L82 PathProgramCache]: Analyzing trace with hash 822953499, now seen corresponding path program 4 times [2021-06-05 15:13:53,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:53,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1083361605] [2021-06-05 15:13:53,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:53,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:53,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:53,979 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:53,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1083361605] [2021-06-05 15:13:53,979 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1083361605] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:53,979 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251985364] [2021-06-05 15:13:53,979 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 577 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:54,001 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:13:54,002 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:54,002 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:54,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:54,095 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:54,095 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:54,096 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:54,103 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:54,104 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:54,104 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:54,163 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1251985364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:54,163 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:54,163 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:54,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1611779147] [2021-06-05 15:13:54,163 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:54,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:54,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:54,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:54,163 INFO L87 Difference]: Start difference. First operand 4412 states and 18722 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:54,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:54,891 INFO L93 Difference]: Finished difference Result 5663 states and 23581 transitions. [2021-06-05 15:13:54,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:54,891 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:54,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:54,901 INFO L225 Difference]: With dead ends: 5663 [2021-06-05 15:13:54,901 INFO L226 Difference]: Without dead ends: 5597 [2021-06-05 15:13:54,901 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 172 ImplicationChecksByTransitivity, 457.1ms TimeCoverageRelationStatistics Valid=136, Invalid=734, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:13:54,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5597 states. [2021-06-05 15:13:54,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5597 to 4457. [2021-06-05 15:13:54,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4457 states, 4456 states have (on average 4.248204667863555) internal successors, (18930), 4456 states have internal predecessors, (18930), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:54,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4457 states to 4457 states and 18930 transitions. [2021-06-05 15:13:54,965 INFO L78 Accepts]: Start accepts. Automaton has 4457 states and 18930 transitions. Word has length 23 [2021-06-05 15:13:54,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:54,965 INFO L482 AbstractCegarLoop]: Abstraction has 4457 states and 18930 transitions. [2021-06-05 15:13:54,965 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:54,965 INFO L276 IsEmpty]: Start isEmpty. Operand 4457 states and 18930 transitions. [2021-06-05 15:13:54,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:54,971 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:54,971 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:55,171 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 577 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1257 [2021-06-05 15:13:55,171 INFO L430 AbstractCegarLoop]: === Iteration 578 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:55,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:55,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1410698821, now seen corresponding path program 5 times [2021-06-05 15:13:55,172 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:55,172 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [323370743] [2021-06-05 15:13:55,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:55,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:55,264 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:55,264 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [323370743] [2021-06-05 15:13:55,264 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [323370743] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:55,264 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228014374] [2021-06-05 15:13:55,264 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 578 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:55,287 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:13:55,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:55,288 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:13:55,288 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:55,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:55,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 35 treesize of output 51 [2021-06-05 15:13:55,427 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:55,436 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:55,438 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-0 vars, 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:55,438 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 2 variables, input treesize:35, output treesize:12 [2021-06-05 15:13:55,470 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:55,470 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [228014374] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:55,470 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:55,470 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-06-05 15:13:55,470 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [52966601] [2021-06-05 15:13:55,470 INFO L462 AbstractCegarLoop]: Interpolant automaton has 17 states [2021-06-05 15:13:55,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:55,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-06-05 15:13:55,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=228, Unknown=0, NotChecked=0, Total=272 [2021-06-05 15:13:55,470 INFO L87 Difference]: Start difference. First operand 4457 states and 18930 transitions. Second operand has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:56,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:56,111 INFO L93 Difference]: Finished difference Result 5357 states and 22443 transitions. [2021-06-05 15:13:56,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:13:56,111 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:56,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:56,121 INFO L225 Difference]: With dead ends: 5357 [2021-06-05 15:13:56,121 INFO L226 Difference]: Without dead ends: 5329 [2021-06-05 15:13:56,122 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 15 SyntacticMatches, 2 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 405.1ms TimeCoverageRelationStatistics Valid=135, Invalid=735, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:13:56,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5329 states. [2021-06-05 15:13:56,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5329 to 4501. [2021-06-05 15:13:56,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4501 states, 4500 states have (on average 4.2508888888888885) internal successors, (19129), 4500 states have internal predecessors, (19129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:56,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4501 states to 4501 states and 19129 transitions. [2021-06-05 15:13:56,186 INFO L78 Accepts]: Start accepts. Automaton has 4501 states and 19129 transitions. Word has length 23 [2021-06-05 15:13:56,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:56,186 INFO L482 AbstractCegarLoop]: Abstraction has 4501 states and 19129 transitions. [2021-06-05 15:13:56,186 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 17 states, 17 states have (on average 2.176470588235294) internal successors, (37), 16 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:56,187 INFO L276 IsEmpty]: Start isEmpty. Operand 4501 states and 19129 transitions. [2021-06-05 15:13:56,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:56,192 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:56,193 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:56,393 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 578 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1259 [2021-06-05 15:13:56,393 INFO L430 AbstractCegarLoop]: === Iteration 579 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:56,393 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:56,393 INFO L82 PathProgramCache]: Analyzing trace with hash -1808557319, now seen corresponding path program 6 times [2021-06-05 15:13:56,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:56,393 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1133619903] [2021-06-05 15:13:56,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:56,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:56,484 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2021-06-05 15:13:56,484 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:56,484 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1133619903] [2021-06-05 15:13:56,484 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1133619903] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:56,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [381137816] [2021-06-05 15:13:56,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 579 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:56,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:13:56,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:56,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:13:56,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:56,597 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:56,597 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:13:56,598 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:56,605 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:56,606 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:56,606 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:13:56,687 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:56,687 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [381137816] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:56,687 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:56,687 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 18 [2021-06-05 15:13:56,687 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915261892] [2021-06-05 15:13:56,687 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:13:56,687 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:56,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:13:56,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:13:56,688 INFO L87 Difference]: Start difference. First operand 4501 states and 19129 transitions. Second operand has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:57,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:57,484 INFO L93 Difference]: Finished difference Result 5494 states and 22980 transitions. [2021-06-05 15:13:57,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:13:57,485 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:57,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:57,495 INFO L225 Difference]: With dead ends: 5494 [2021-06-05 15:13:57,496 INFO L226 Difference]: Without dead ends: 5448 [2021-06-05 15:13:57,496 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 558.2ms TimeCoverageRelationStatistics Valid=132, Invalid=738, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:13:57,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5448 states. [2021-06-05 15:13:57,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5448 to 4547. [2021-06-05 15:13:57,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4547 states, 4546 states have (on average 4.251869775626925) internal successors, (19329), 4546 states have internal predecessors, (19329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:57,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4547 states to 4547 states and 19329 transitions. [2021-06-05 15:13:57,562 INFO L78 Accepts]: Start accepts. Automaton has 4547 states and 19329 transitions. Word has length 23 [2021-06-05 15:13:57,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:57,562 INFO L482 AbstractCegarLoop]: Abstraction has 4547 states and 19329 transitions. [2021-06-05 15:13:57,562 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.3684210526315788) internal successors, (45), 18 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:57,562 INFO L276 IsEmpty]: Start isEmpty. Operand 4547 states and 19329 transitions. [2021-06-05 15:13:57,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:57,568 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:57,568 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:57,768 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1262,579 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:57,768 INFO L430 AbstractCegarLoop]: === Iteration 580 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:57,768 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:57,769 INFO L82 PathProgramCache]: Analyzing trace with hash 601928087, now seen corresponding path program 7 times [2021-06-05 15:13:57,769 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:57,769 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1834313783] [2021-06-05 15:13:57,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:57,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:57,857 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:57,857 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:57,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1834313783] [2021-06-05 15:13:57,857 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1834313783] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:57,857 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73546132] [2021-06-05 15:13:57,857 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 580 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:57,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:57,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:57,881 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:58,012 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:58,012 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:58,013 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:58,021 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:58,021 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:58,021 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:58,082 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:58,082 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73546132] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:58,082 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:58,082 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:13:58,082 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455994497] [2021-06-05 15:13:58,082 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:13:58,082 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:58,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:13:58,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:13:58,082 INFO L87 Difference]: Start difference. First operand 4547 states and 19329 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:58,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:13:58,989 INFO L93 Difference]: Finished difference Result 5474 states and 22929 transitions. [2021-06-05 15:13:58,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:13:58,989 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:13:58,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:13:58,999 INFO L225 Difference]: With dead ends: 5474 [2021-06-05 15:13:58,999 INFO L226 Difference]: Without dead ends: 5440 [2021-06-05 15:13:58,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 801.3ms TimeCoverageRelationStatistics Valid=214, Invalid=1268, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:13:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5440 states. [2021-06-05 15:13:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5440 to 4568. [2021-06-05 15:13:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4567 states have (on average 4.253558134442741) internal successors, (19426), 4567 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 19426 transitions. [2021-06-05 15:13:59,064 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 19426 transitions. Word has length 23 [2021-06-05 15:13:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:13:59,064 INFO L482 AbstractCegarLoop]: Abstraction has 4568 states and 19426 transitions. [2021-06-05 15:13:59,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:13:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 19426 transitions. [2021-06-05 15:13:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:13:59,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:13:59,070 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:13:59,270 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 580 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1264 [2021-06-05 15:13:59,270 INFO L430 AbstractCegarLoop]: === Iteration 581 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:13:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:13:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash -726769333, now seen corresponding path program 8 times [2021-06-05 15:13:59,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:13:59,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213436660] [2021-06-05 15:13:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:13:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:13:59,359 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:59,359 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:13:59,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213436660] [2021-06-05 15:13:59,359 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1213436660] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:59,359 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645087257] [2021-06-05 15:13:59,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 581 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:13:59,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:13:59,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:13:59,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:13:59,384 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:13:59,484 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:59,484 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:13:59,485 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:13:59,493 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:13:59,494 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:13:59,494 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:13:59,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:13:59,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [645087257] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:13:59,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:13:59,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:13:59,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909307055] [2021-06-05 15:13:59,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:13:59,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:13:59,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:13:59,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:13:59,567 INFO L87 Difference]: Start difference. First operand 4568 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:00,442 INFO L93 Difference]: Finished difference Result 5696 states and 23793 transitions. [2021-06-05 15:14:00,442 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:14:00,442 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:00,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:00,452 INFO L225 Difference]: With dead ends: 5696 [2021-06-05 15:14:00,452 INFO L226 Difference]: Without dead ends: 5634 [2021-06-05 15:14:00,453 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 612.8ms TimeCoverageRelationStatistics Valid=175, Invalid=1015, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:14:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5634 states. [2021-06-05 15:14:00,526 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5634 to 4568. [2021-06-05 15:14:00,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4568 states, 4567 states have (on average 4.253558134442741) internal successors, (19426), 4567 states have internal predecessors, (19426), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4568 states to 4568 states and 19426 transitions. [2021-06-05 15:14:00,541 INFO L78 Accepts]: Start accepts. Automaton has 4568 states and 19426 transitions. Word has length 23 [2021-06-05 15:14:00,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:00,541 INFO L482 AbstractCegarLoop]: Abstraction has 4568 states and 19426 transitions. [2021-06-05 15:14:00,541 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:00,541 INFO L276 IsEmpty]: Start isEmpty. Operand 4568 states and 19426 transitions. [2021-06-05 15:14:00,547 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:00,547 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:00,547 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:00,747 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1266,581 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:00,747 INFO L430 AbstractCegarLoop]: === Iteration 582 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:00,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:00,748 INFO L82 PathProgramCache]: Analyzing trace with hash -139024011, now seen corresponding path program 9 times [2021-06-05 15:14:00,748 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:00,748 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807954057] [2021-06-05 15:14:00,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:00,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:00,844 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:00,844 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:00,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807954057] [2021-06-05 15:14:00,844 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807954057] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:00,844 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1464621409] [2021-06-05 15:14:00,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 582 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:00,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:00,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:00,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:00,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:00,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:00,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:00,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:00,988 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:00,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:00,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:01,078 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:01,078 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1464621409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:01,078 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:01,078 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:01,078 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382106446] [2021-06-05 15:14:01,078 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:01,078 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:01,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:01,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:01,078 INFO L87 Difference]: Start difference. First operand 4568 states and 19426 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:02,016 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:02,016 INFO L93 Difference]: Finished difference Result 5416 states and 22681 transitions. [2021-06-05 15:14:02,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:14:02,017 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:02,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:02,026 INFO L225 Difference]: With dead ends: 5416 [2021-06-05 15:14:02,026 INFO L226 Difference]: Without dead ends: 5360 [2021-06-05 15:14:02,026 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 708.9ms TimeCoverageRelationStatistics Valid=185, Invalid=1075, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:14:02,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5360 states. [2021-06-05 15:14:02,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5360 to 4574. [2021-06-05 15:14:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254100153072382) internal successors, (19454), 4573 states have internal predecessors, (19454), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:02,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19454 transitions. [2021-06-05 15:14:02,091 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19454 transitions. Word has length 23 [2021-06-05 15:14:02,091 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:02,091 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19454 transitions. [2021-06-05 15:14:02,091 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:02,091 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19454 transitions. [2021-06-05 15:14:02,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:02,097 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:02,097 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:02,297 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 582 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1268 [2021-06-05 15:14:02,297 INFO L430 AbstractCegarLoop]: === Iteration 583 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:02,297 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:02,297 INFO L82 PathProgramCache]: Analyzing trace with hash 936687145, now seen corresponding path program 10 times [2021-06-05 15:14:02,298 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:02,298 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [475796513] [2021-06-05 15:14:02,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:02,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:02,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:02,396 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [475796513] [2021-06-05 15:14:02,396 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [475796513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:02,396 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439532095] [2021-06-05 15:14:02,396 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 583 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:02,420 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:02,420 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:02,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:02,421 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:02,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:02,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:02,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:02,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:02,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:02,528 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:02,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:02,612 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1439532095] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:02,612 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:02,613 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:02,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048378930] [2021-06-05 15:14:02,613 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:02,613 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:02,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:02,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:02,613 INFO L87 Difference]: Start difference. First operand 4574 states and 19454 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:03,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:03,527 INFO L93 Difference]: Finished difference Result 5380 states and 22550 transitions. [2021-06-05 15:14:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:14:03,527 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:03,538 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 15:14:03,538 INFO L226 Difference]: Without dead ends: 5334 [2021-06-05 15:14:03,538 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 709.9ms TimeCoverageRelationStatistics Valid=166, Invalid=1024, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:14:03,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-05 15:14:03,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4572. [2021-06-05 15:14:03,598 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4572 states, 4571 states have (on average 4.254648873331875) internal successors, (19448), 4571 states have internal predecessors, (19448), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:03,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4572 states to 4572 states and 19448 transitions. [2021-06-05 15:14:03,609 INFO L78 Accepts]: Start accepts. Automaton has 4572 states and 19448 transitions. Word has length 23 [2021-06-05 15:14:03,609 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:03,609 INFO L482 AbstractCegarLoop]: Abstraction has 4572 states and 19448 transitions. [2021-06-05 15:14:03,609 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:03,609 INFO L276 IsEmpty]: Start isEmpty. Operand 4572 states and 19448 transitions. [2021-06-05 15:14:03,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:03,615 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:03,615 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:03,815 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 583 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1270 [2021-06-05 15:14:03,816 INFO L430 AbstractCegarLoop]: === Iteration 584 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:03,816 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:03,816 INFO L82 PathProgramCache]: Analyzing trace with hash -1544061897, now seen corresponding path program 7 times [2021-06-05 15:14:03,816 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:03,816 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577834334] [2021-06-05 15:14:03,816 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:03,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:03,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:03,902 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:03,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [577834334] [2021-06-05 15:14:03,902 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [577834334] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:03,902 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130433769] [2021-06-05 15:14:03,902 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 584 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:03,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:03,925 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:03,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:04,034 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:04,034 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:04,035 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:04,043 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:04,043 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:04,043 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:04,105 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:04,105 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1130433769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:04,105 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:04,105 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:04,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402304146] [2021-06-05 15:14:04,105 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:04,105 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:04,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:04,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:04,106 INFO L87 Difference]: Start difference. First operand 4572 states and 19448 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:05,088 INFO L93 Difference]: Finished difference Result 5685 states and 23805 transitions. [2021-06-05 15:14:05,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:14:05,089 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:05,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:05,098 INFO L225 Difference]: With dead ends: 5685 [2021-06-05 15:14:05,098 INFO L226 Difference]: Without dead ends: 5641 [2021-06-05 15:14:05,099 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 671.4ms TimeCoverageRelationStatistics Valid=208, Invalid=1352, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:14:05,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5641 states. [2021-06-05 15:14:05,150 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5641 to 4574. [2021-06-05 15:14:05,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,164 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 15:14:05,164 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 15:14:05,164 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:05,164 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 15:14:05,164 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:05,164 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 15:14:05,170 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:05,170 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:05,170 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:05,371 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1272,584 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:05,371 INFO L430 AbstractCegarLoop]: === Iteration 585 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:05,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:05,371 INFO L82 PathProgramCache]: Analyzing trace with hash -958727945, now seen corresponding path program 8 times [2021-06-05 15:14:05,371 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:05,371 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647042217] [2021-06-05 15:14:05,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:05,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:05,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:05,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:05,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647042217] [2021-06-05 15:14:05,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1647042217] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:05,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737145900] [2021-06-05 15:14:05,469 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 585 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:05,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:05,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:05,492 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:05,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:05,585 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:05,585 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:05,586 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:05,594 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:05,595 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:05,595 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:05,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:05,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1737145900] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:05,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:05,679 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:05,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1819044600] [2021-06-05 15:14:05,679 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:05,679 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:05,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:05,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:05,679 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:06,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:06,740 INFO L93 Difference]: Finished difference Result 5479 states and 22926 transitions. [2021-06-05 15:14:06,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:14:06,740 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:06,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:06,750 INFO L225 Difference]: With dead ends: 5479 [2021-06-05 15:14:06,750 INFO L226 Difference]: Without dead ends: 5427 [2021-06-05 15:14:06,750 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 857.1ms TimeCoverageRelationStatistics Valid=238, Invalid=1484, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:14:06,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5427 states. [2021-06-05 15:14:06,801 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5427 to 4578. [2021-06-05 15:14:06,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.2549705046974005) internal successors, (19475), 4577 states have internal predecessors, (19475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:06,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 19475 transitions. [2021-06-05 15:14:06,815 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 19475 transitions. Word has length 23 [2021-06-05 15:14:06,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:06,815 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 19475 transitions. [2021-06-05 15:14:06,815 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:06,815 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 19475 transitions. [2021-06-05 15:14:06,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:06,821 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:06,821 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:07,021 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1274,585 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:07,022 INFO L430 AbstractCegarLoop]: === Iteration 586 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:07,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:07,022 INFO L82 PathProgramCache]: Analyzing trace with hash 654838789, now seen corresponding path program 9 times [2021-06-05 15:14:07,022 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:07,022 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1634961945] [2021-06-05 15:14:07,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:07,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:07,118 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:07,119 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1634961945] [2021-06-05 15:14:07,119 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1634961945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:07,119 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071232240] [2021-06-05 15:14:07,119 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 586 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:07,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:14:07,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:07,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:07,143 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:07,237 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:07,238 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:07,239 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:07,246 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:07,247 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:07,247 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:07,330 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:07,330 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071232240] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:07,330 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:07,330 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:07,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002454232] [2021-06-05 15:14:07,330 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:07,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:07,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:07,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:07,331 INFO L87 Difference]: Start difference. First operand 4578 states and 19475 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:08,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:08,428 INFO L93 Difference]: Finished difference Result 5406 states and 22644 transitions. [2021-06-05 15:14:08,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:08,428 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:08,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:08,461 INFO L225 Difference]: With dead ends: 5406 [2021-06-05 15:14:08,461 INFO L226 Difference]: Without dead ends: 5364 [2021-06-05 15:14:08,461 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 815.7ms TimeCoverageRelationStatistics Valid=222, Invalid=1338, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:14:08,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5364 states. [2021-06-05 15:14:08,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5364 to 4574. [2021-06-05 15:14:08,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:08,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 15:14:08,523 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 15:14:08,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:08,523 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 15:14:08,523 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:08,523 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 15:14:08,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:08,529 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:08,529 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:08,730 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 586 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1276 [2021-06-05 15:14:08,730 INFO L430 AbstractCegarLoop]: === Iteration 587 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:08,730 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:08,730 INFO L82 PathProgramCache]: Analyzing trace with hash -1771283277, now seen corresponding path program 10 times [2021-06-05 15:14:08,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:08,730 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986710918] [2021-06-05 15:14:08,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:08,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:08,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:08,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:08,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986710918] [2021-06-05 15:14:08,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986710918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:08,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553984694] [2021-06-05 15:14:08,816 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 587 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:08,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:08,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:08,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:08,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:08,948 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:08,949 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:08,950 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:08,957 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:08,958 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:08,958 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:09,021 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:09,021 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553984694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:09,021 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:09,021 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:09,021 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197414234] [2021-06-05 15:14:09,021 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:09,021 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:09,022 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:09,022 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:09,022 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,095 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:10,095 INFO L93 Difference]: Finished difference Result 5921 states and 24768 transitions. [2021-06-05 15:14:10,095 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:14:10,096 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:10,096 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:10,106 INFO L225 Difference]: With dead ends: 5921 [2021-06-05 15:14:10,107 INFO L226 Difference]: Without dead ends: 5877 [2021-06-05 15:14:10,107 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 436 ImplicationChecksByTransitivity, 789.7ms TimeCoverageRelationStatistics Valid=247, Invalid=1645, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:14:10,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5877 states. [2021-06-05 15:14:10,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5877 to 4574. [2021-06-05 15:14:10,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 15:14:10,179 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 15:14:10,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:10,179 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 15:14:10,179 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:10,179 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 15:14:10,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:10,186 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:10,186 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:10,386 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 587 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1278 [2021-06-05 15:14:10,386 INFO L430 AbstractCegarLoop]: === Iteration 588 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:10,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:10,386 INFO L82 PathProgramCache]: Analyzing trace with hash -1257756425, now seen corresponding path program 11 times [2021-06-05 15:14:10,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:10,386 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005803787] [2021-06-05 15:14:10,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:10,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:10,471 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:10,471 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005803787] [2021-06-05 15:14:10,471 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005803787] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:10,471 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773040145] [2021-06-05 15:14:10,471 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 588 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:10,494 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:14:10,494 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:10,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 29 conjunts are in the unsatisfiable core [2021-06-05 15:14:10,495 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:10,587 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:10,588 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 36 treesize of output 46 [2021-06-05 15:14:10,589 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:10,598 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:10,598 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:10,598 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:36, output treesize:37 [2021-06-05 15:14:10,648 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:10,648 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [773040145] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:10,648 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:10,648 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 17 [2021-06-05 15:14:10,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [978696197] [2021-06-05 15:14:10,648 INFO L462 AbstractCegarLoop]: Interpolant automaton has 18 states [2021-06-05 15:14:10,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:10,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-06-05 15:14:10,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=262, Unknown=0, NotChecked=0, Total=306 [2021-06-05 15:14:10,649 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:11,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:11,557 INFO L93 Difference]: Finished difference Result 5605 states and 23487 transitions. [2021-06-05 15:14:11,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2021-06-05 15:14:11,558 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:11,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:11,567 INFO L225 Difference]: With dead ends: 5605 [2021-06-05 15:14:11,567 INFO L226 Difference]: Without dead ends: 5580 [2021-06-05 15:14:11,567 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 2 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 435 ImplicationChecksByTransitivity, 707.2ms TimeCoverageRelationStatistics Valid=233, Invalid=1573, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:14:11,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5580 states. [2021-06-05 15:14:11,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5580 to 4578. [2021-06-05 15:14:11,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4578 states, 4577 states have (on average 4.2549705046974005) internal successors, (19475), 4577 states have internal predecessors, (19475), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:11,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4578 states to 4578 states and 19475 transitions. [2021-06-05 15:14:11,631 INFO L78 Accepts]: Start accepts. Automaton has 4578 states and 19475 transitions. Word has length 23 [2021-06-05 15:14:11,631 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:11,631 INFO L482 AbstractCegarLoop]: Abstraction has 4578 states and 19475 transitions. [2021-06-05 15:14:11,631 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 18 states, 18 states have (on average 2.0555555555555554) internal successors, (37), 17 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:11,631 INFO L276 IsEmpty]: Start isEmpty. Operand 4578 states and 19475 transitions. [2021-06-05 15:14:11,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:11,637 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:11,637 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:11,837 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1280,588 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:11,838 INFO L430 AbstractCegarLoop]: === Iteration 589 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:11,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:11,838 INFO L82 PathProgramCache]: Analyzing trace with hash -182045269, now seen corresponding path program 12 times [2021-06-05 15:14:11,838 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:11,838 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970165699] [2021-06-05 15:14:11,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:11,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:11,922 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:11,923 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:11,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970165699] [2021-06-05 15:14:11,923 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [970165699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:11,923 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [972861801] [2021-06-05 15:14:11,923 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 589 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:11,945 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:14:11,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:11,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:11,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:12,040 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:12,041 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:12,042 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:12,049 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:12,050 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:12,050 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:12,133 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:12,134 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [972861801] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:12,134 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:12,134 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:12,134 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550752168] [2021-06-05 15:14:12,134 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:12,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:12,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:12,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:12,134 INFO L87 Difference]: Start difference. First operand 4578 states and 19475 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:13,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:13,048 INFO L93 Difference]: Finished difference Result 5643 states and 23600 transitions. [2021-06-05 15:14:13,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:14:13,049 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:13,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:13,058 INFO L225 Difference]: With dead ends: 5643 [2021-06-05 15:14:13,058 INFO L226 Difference]: Without dead ends: 5601 [2021-06-05 15:14:13,059 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 757.3ms TimeCoverageRelationStatistics Valid=222, Invalid=1418, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:14:13,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5601 states. [2021-06-05 15:14:13,109 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5601 to 4574. [2021-06-05 15:14:13,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:13,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 15:14:13,122 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 15:14:13,122 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:13,122 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 15:14:13,122 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:13,123 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 15:14:13,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:13,129 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:13,129 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:13,329 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1283,589 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:13,329 INFO L430 AbstractCegarLoop]: === Iteration 590 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:13,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:13,329 INFO L82 PathProgramCache]: Analyzing trace with hash 98950583, now seen corresponding path program 13 times [2021-06-05 15:14:13,329 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:13,329 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856790017] [2021-06-05 15:14:13,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:13,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:13,426 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:13,426 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856790017] [2021-06-05 15:14:13,426 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856790017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:13,426 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174882088] [2021-06-05 15:14:13,426 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 590 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:13,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:13,449 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:13,527 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:13,527 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:13,528 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:13,537 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:13,537 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:13,537 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:13,678 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:13,678 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [174882088] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:13,678 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:13,678 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:13,678 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510694159] [2021-06-05 15:14:13,678 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:13,678 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:13,679 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:13,679 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:13,679 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:14,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:14,499 INFO L93 Difference]: Finished difference Result 5111 states and 21521 transitions. [2021-06-05 15:14:14,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:14,500 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:14,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:14,509 INFO L225 Difference]: With dead ends: 5111 [2021-06-05 15:14:14,509 INFO L226 Difference]: Without dead ends: 5085 [2021-06-05 15:14:14,509 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 724.1ms TimeCoverageRelationStatistics Valid=204, Invalid=1202, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:14:14,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5085 states. [2021-06-05 15:14:14,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5085 to 4583. [2021-06-05 15:14:14,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4583 states, 4582 states have (on average 4.253382802269751) internal successors, (19489), 4582 states have internal predecessors, (19489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:14,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4583 states to 4583 states and 19489 transitions. [2021-06-05 15:14:14,576 INFO L78 Accepts]: Start accepts. Automaton has 4583 states and 19489 transitions. Word has length 23 [2021-06-05 15:14:14,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:14,576 INFO L482 AbstractCegarLoop]: Abstraction has 4583 states and 19489 transitions. [2021-06-05 15:14:14,576 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:14,576 INFO L276 IsEmpty]: Start isEmpty. Operand 4583 states and 19489 transitions. [2021-06-05 15:14:14,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:14,583 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:14,583 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:14,783 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1285,590 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:14,784 INFO L430 AbstractCegarLoop]: === Iteration 591 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:14,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:14,784 INFO L82 PathProgramCache]: Analyzing trace with hash -942625485, now seen corresponding path program 14 times [2021-06-05 15:14:14,784 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:14,784 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379558369] [2021-06-05 15:14:14,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:14,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:14,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:14,879 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:14,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379558369] [2021-06-05 15:14:14,879 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379558369] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:14,879 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60023507] [2021-06-05 15:14:14,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 591 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:14,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:14,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:14,903 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:14,903 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:14,979 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:14,979 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:14,980 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:14,989 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:14,989 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:14,989 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:15,092 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:15,092 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60023507] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:15,092 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:15,092 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:15,092 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306554863] [2021-06-05 15:14:15,092 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:15,092 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:15,093 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:15,093 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:15,093 INFO L87 Difference]: Start difference. First operand 4583 states and 19489 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:15,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:15,875 INFO L93 Difference]: Finished difference Result 5109 states and 21511 transitions. [2021-06-05 15:14:15,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:14:15,875 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:15,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:15,885 INFO L225 Difference]: With dead ends: 5109 [2021-06-05 15:14:15,885 INFO L226 Difference]: Without dead ends: 5081 [2021-06-05 15:14:15,885 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 668.8ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:14:15,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-06-05 15:14:15,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4576. [2021-06-05 15:14:15,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.254644808743169) internal successors, (19465), 4575 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:15,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19465 transitions. [2021-06-05 15:14:15,948 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19465 transitions. Word has length 23 [2021-06-05 15:14:15,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:15,948 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 19465 transitions. [2021-06-05 15:14:15,948 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:15,948 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19465 transitions. [2021-06-05 15:14:15,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:15,955 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:15,955 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:16,155 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 591 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1287 [2021-06-05 15:14:16,155 INFO L430 AbstractCegarLoop]: === Iteration 592 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:16,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:16,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1229746837, now seen corresponding path program 15 times [2021-06-05 15:14:16,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:16,155 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1893985688] [2021-06-05 15:14:16,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:16,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:16,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:16,289 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:16,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1893985688] [2021-06-05 15:14:16,289 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1893985688] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:16,289 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180342006] [2021-06-05 15:14:16,289 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 592 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:16,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:14:16,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:16,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:16,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:16,395 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:16,396 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:14:16,397 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:16,406 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:16,406 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:16,407 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:14:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:16,516 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180342006] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:16,516 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:16,516 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:16,516 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095705446] [2021-06-05 15:14:16,517 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:16,517 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:16,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:16,517 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:16,517 INFO L87 Difference]: Start difference. First operand 4576 states and 19465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:17,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:17,358 INFO L93 Difference]: Finished difference Result 5090 states and 21438 transitions. [2021-06-05 15:14:17,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:14:17,358 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:17,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:17,367 INFO L225 Difference]: With dead ends: 5090 [2021-06-05 15:14:17,367 INFO L226 Difference]: Without dead ends: 5064 [2021-06-05 15:14:17,368 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 684.1ms TimeCoverageRelationStatistics Valid=199, Invalid=1133, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:14:17,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5064 states. [2021-06-05 15:14:17,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5064 to 4580. [2021-06-05 15:14:17,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.254422362961345) internal successors, (19481), 4579 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:17,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 19481 transitions. [2021-06-05 15:14:17,432 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 19481 transitions. Word has length 23 [2021-06-05 15:14:17,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:17,432 INFO L482 AbstractCegarLoop]: Abstraction has 4580 states and 19481 transitions. [2021-06-05 15:14:17,433 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:17,433 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 19481 transitions. [2021-06-05 15:14:17,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:17,439 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:17,439 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:17,639 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 592 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1289 [2021-06-05 15:14:17,639 INFO L430 AbstractCegarLoop]: === Iteration 593 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:17,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:17,639 INFO L82 PathProgramCache]: Analyzing trace with hash -1722964223, now seen corresponding path program 16 times [2021-06-05 15:14:17,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:17,640 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388046416] [2021-06-05 15:14:17,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:17,641 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:17,746 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:17,747 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388046416] [2021-06-05 15:14:17,747 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1388046416] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:17,747 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1349991455] [2021-06-05 15:14:17,747 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 593 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:17,770 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:17,770 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:17,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:17,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:17,850 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:17,850 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:17,851 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:17,860 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:17,860 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:17,860 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:17,965 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:17,965 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1349991455] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:17,965 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:17,965 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:17,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [395341630] [2021-06-05 15:14:17,966 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:17,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:17,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:17,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:17,966 INFO L87 Difference]: Start difference. First operand 4580 states and 19481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:18,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:18,786 INFO L93 Difference]: Finished difference Result 5035 states and 21226 transitions. [2021-06-05 15:14:18,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:14:18,787 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:18,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:18,796 INFO L225 Difference]: With dead ends: 5035 [2021-06-05 15:14:18,796 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 15:14:18,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 641.9ms TimeCoverageRelationStatistics Valid=180, Invalid=1010, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:14:18,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 15:14:18,845 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4576. [2021-06-05 15:14:18,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4576 states, 4575 states have (on average 4.254644808743169) internal successors, (19465), 4575 states have internal predecessors, (19465), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:18,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4576 states to 4576 states and 19465 transitions. [2021-06-05 15:14:18,858 INFO L78 Accepts]: Start accepts. Automaton has 4576 states and 19465 transitions. Word has length 23 [2021-06-05 15:14:18,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:18,858 INFO L482 AbstractCegarLoop]: Abstraction has 4576 states and 19465 transitions. [2021-06-05 15:14:18,858 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:18,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4576 states and 19465 transitions. [2021-06-05 15:14:18,864 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:18,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:18,865 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:19,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1291,593 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:19,065 INFO L430 AbstractCegarLoop]: === Iteration 594 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:19,065 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:19,065 INFO L82 PathProgramCache]: Analyzing trace with hash -788187967, now seen corresponding path program 17 times [2021-06-05 15:14:19,065 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:19,065 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180129724] [2021-06-05 15:14:19,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:19,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:19,159 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180129724] [2021-06-05 15:14:19,159 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180129724] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:19,159 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686469800] [2021-06-05 15:14:19,159 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 594 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:19,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:19,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:19,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:19,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:19,257 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:19,258 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:19,259 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:19,267 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:19,268 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:19,268 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:19,368 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:19,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686469800] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:19,368 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:19,368 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:19,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069903126] [2021-06-05 15:14:19,368 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:19,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:19,369 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:19,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:19,369 INFO L87 Difference]: Start difference. First operand 4576 states and 19465 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,112 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:20,112 INFO L93 Difference]: Finished difference Result 5100 states and 21473 transitions. [2021-06-05 15:14:20,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:14:20,112 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:20,112 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:20,121 INFO L225 Difference]: With dead ends: 5100 [2021-06-05 15:14:20,121 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 15:14:20,121 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 605.0ms TimeCoverageRelationStatistics Valid=199, Invalid=1061, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:14:20,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 15:14:20,170 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4580. [2021-06-05 15:14:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4580 states, 4579 states have (on average 4.254422362961345) internal successors, (19481), 4579 states have internal predecessors, (19481), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4580 states to 4580 states and 19481 transitions. [2021-06-05 15:14:20,183 INFO L78 Accepts]: Start accepts. Automaton has 4580 states and 19481 transitions. Word has length 23 [2021-06-05 15:14:20,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:20,184 INFO L482 AbstractCegarLoop]: Abstraction has 4580 states and 19481 transitions. [2021-06-05 15:14:20,184 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:20,184 INFO L276 IsEmpty]: Start isEmpty. Operand 4580 states and 19481 transitions. [2021-06-05 15:14:20,190 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:20,190 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:20,190 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:20,390 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1293,594 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:20,390 INFO L430 AbstractCegarLoop]: === Iteration 595 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:20,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:20,390 INFO L82 PathProgramCache]: Analyzing trace with hash -1800880499, now seen corresponding path program 18 times [2021-06-05 15:14:20,390 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:20,390 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722176853] [2021-06-05 15:14:20,390 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:20,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:20,485 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:20,485 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:20,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722176853] [2021-06-05 15:14:20,485 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722176853] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:20,485 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222425899] [2021-06-05 15:14:20,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 595 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:20,509 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:14:20,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:20,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:20,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:20,591 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:20,592 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:14:20,593 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:20,602 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:20,603 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:20,603 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 15:14:20,712 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:20,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222425899] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:20,712 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:20,712 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:20,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [265919384] [2021-06-05 15:14:20,712 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:20,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:20,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:20,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:20,713 INFO L87 Difference]: Start difference. First operand 4580 states and 19481 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:21,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:21,521 INFO L93 Difference]: Finished difference Result 5049 states and 21279 transitions. [2021-06-05 15:14:21,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:14:21,522 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:21,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:21,530 INFO L225 Difference]: With dead ends: 5049 [2021-06-05 15:14:21,530 INFO L226 Difference]: Without dead ends: 5028 [2021-06-05 15:14:21,530 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 645.6ms TimeCoverageRelationStatistics Valid=184, Invalid=1076, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:14:21,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5028 states. [2021-06-05 15:14:21,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5028 to 4574. [2021-06-05 15:14:21,581 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4574 states, 4573 states have (on average 4.254756177563962) internal successors, (19457), 4573 states have internal predecessors, (19457), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:21,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4574 states to 4574 states and 19457 transitions. [2021-06-05 15:14:21,591 INFO L78 Accepts]: Start accepts. Automaton has 4574 states and 19457 transitions. Word has length 23 [2021-06-05 15:14:21,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:21,591 INFO L482 AbstractCegarLoop]: Abstraction has 4574 states and 19457 transitions. [2021-06-05 15:14:21,591 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:21,591 INFO L276 IsEmpty]: Start isEmpty. Operand 4574 states and 19457 transitions. [2021-06-05 15:14:21,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:21,597 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:21,597 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:21,797 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1295,595 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:21,798 INFO L430 AbstractCegarLoop]: === Iteration 596 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:21,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:21,798 INFO L82 PathProgramCache]: Analyzing trace with hash -652014379, now seen corresponding path program 19 times [2021-06-05 15:14:21,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:21,798 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841678089] [2021-06-05 15:14:21,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:21,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:21,887 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:21,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841678089] [2021-06-05 15:14:21,887 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841678089] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:21,887 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742325360] [2021-06-05 15:14:21,887 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 596 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:21,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:21,912 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:21,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:22,016 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:22,016 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:22,017 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:22,025 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:22,025 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:22,026 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:22,088 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:22,088 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1742325360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:22,088 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:22,088 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:22,088 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1728801097] [2021-06-05 15:14:22,089 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:22,089 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:22,089 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:22,089 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:22,089 INFO L87 Difference]: Start difference. First operand 4574 states and 19457 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:23,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:23,058 INFO L93 Difference]: Finished difference Result 5487 states and 22970 transitions. [2021-06-05 15:14:23,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:14:23,058 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:23,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:23,068 INFO L225 Difference]: With dead ends: 5487 [2021-06-05 15:14:23,068 INFO L226 Difference]: Without dead ends: 5452 [2021-06-05 15:14:23,068 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 712.4ms TimeCoverageRelationStatistics Valid=219, Invalid=1421, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:14:23,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5452 states. [2021-06-05 15:14:23,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5452 to 4570. [2021-06-05 15:14:23,124 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4570 states, 4569 states have (on average 4.2519150798861896) internal successors, (19427), 4569 states have internal predecessors, (19427), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:23,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4570 states to 4570 states and 19427 transitions. [2021-06-05 15:14:23,135 INFO L78 Accepts]: Start accepts. Automaton has 4570 states and 19427 transitions. Word has length 23 [2021-06-05 15:14:23,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:23,135 INFO L482 AbstractCegarLoop]: Abstraction has 4570 states and 19427 transitions. [2021-06-05 15:14:23,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:23,136 INFO L276 IsEmpty]: Start isEmpty. Operand 4570 states and 19427 transitions. [2021-06-05 15:14:23,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:23,142 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:23,142 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:23,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 596 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1297 [2021-06-05 15:14:23,342 INFO L430 AbstractCegarLoop]: === Iteration 597 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:23,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:23,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1093269657, now seen corresponding path program 20 times [2021-06-05 15:14:23,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:23,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975537243] [2021-06-05 15:14:23,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:23,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:23,429 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:23,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:23,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975537243] [2021-06-05 15:14:23,430 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975537243] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:23,430 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441045352] [2021-06-05 15:14:23,430 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 597 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:23,454 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:23,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:23,454 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:23,455 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:23,553 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:23,553 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:14:23,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:23,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:23,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:23,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:39 [2021-06-05 15:14:23,658 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:23,658 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441045352] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:23,658 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:23,658 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:23,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011864361] [2021-06-05 15:14:23,658 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:23,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:23,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:23,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:23,658 INFO L87 Difference]: Start difference. First operand 4570 states and 19427 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:24,576 INFO L93 Difference]: Finished difference Result 5170 states and 21719 transitions. [2021-06-05 15:14:24,576 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:24,576 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:24,576 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:24,586 INFO L225 Difference]: With dead ends: 5170 [2021-06-05 15:14:24,586 INFO L226 Difference]: Without dead ends: 5144 [2021-06-05 15:14:24,586 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 311 ImplicationChecksByTransitivity, 735.7ms TimeCoverageRelationStatistics Valid=186, Invalid=1296, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:14:24,591 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5144 states. [2021-06-05 15:14:24,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5144 to 4577. [2021-06-05 15:14:24,640 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4577 states, 4576 states have (on average 4.250655594405594) internal successors, (19451), 4576 states have internal predecessors, (19451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,650 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4577 states to 4577 states and 19451 transitions. [2021-06-05 15:14:24,650 INFO L78 Accepts]: Start accepts. Automaton has 4577 states and 19451 transitions. Word has length 23 [2021-06-05 15:14:24,650 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:24,650 INFO L482 AbstractCegarLoop]: Abstraction has 4577 states and 19451 transitions. [2021-06-05 15:14:24,650 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:24,650 INFO L276 IsEmpty]: Start isEmpty. Operand 4577 states and 19451 transitions. [2021-06-05 15:14:24,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:24,657 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:24,657 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:24,857 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 597 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1299 [2021-06-05 15:14:24,857 INFO L430 AbstractCegarLoop]: === Iteration 598 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:24,857 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:24,857 INFO L82 PathProgramCache]: Analyzing trace with hash 51693589, now seen corresponding path program 21 times [2021-06-05 15:14:24,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:24,857 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1694730670] [2021-06-05 15:14:24,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:24,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:24,943 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:24,943 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:24,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1694730670] [2021-06-05 15:14:24,943 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1694730670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:24,943 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [998931823] [2021-06-05 15:14:24,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 598 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:24,967 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:14:24,967 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:24,968 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:24,968 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:25,058 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:25,058 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:25,059 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:25,068 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:25,068 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:25,068 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:14:25,153 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:25,153 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [998931823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:25,153 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:25,153 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:25,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523141084] [2021-06-05 15:14:25,154 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:25,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:25,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:25,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:25,154 INFO L87 Difference]: Start difference. First operand 4577 states and 19451 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:26,050 INFO L93 Difference]: Finished difference Result 5165 states and 21705 transitions. [2021-06-05 15:14:26,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:14:26,050 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:26,050 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:26,059 INFO L225 Difference]: With dead ends: 5165 [2021-06-05 15:14:26,059 INFO L226 Difference]: Without dead ends: 5133 [2021-06-05 15:14:26,060 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 651.6ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:14:26,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5133 states. [2021-06-05 15:14:26,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5133 to 4559. [2021-06-05 15:14:26,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4559 states, 4558 states have (on average 4.252742430890741) internal successors, (19384), 4558 states have internal predecessors, (19384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4559 states to 4559 states and 19384 transitions. [2021-06-05 15:14:26,124 INFO L78 Accepts]: Start accepts. Automaton has 4559 states and 19384 transitions. Word has length 23 [2021-06-05 15:14:26,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:26,124 INFO L482 AbstractCegarLoop]: Abstraction has 4559 states and 19384 transitions. [2021-06-05 15:14:26,124 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:26,124 INFO L276 IsEmpty]: Start isEmpty. Operand 4559 states and 19384 transitions. [2021-06-05 15:14:26,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:26,130 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:26,130 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:26,330 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1301,598 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:26,330 INFO L430 AbstractCegarLoop]: === Iteration 599 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:26,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:26,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1108038561, now seen corresponding path program 22 times [2021-06-05 15:14:26,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:26,331 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37640918] [2021-06-05 15:14:26,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:26,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:26,416 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:26,416 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:26,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37640918] [2021-06-05 15:14:26,416 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [37640918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:26,416 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480522235] [2021-06-05 15:14:26,416 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 599 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:26,440 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:26,441 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:26,441 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:26,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:26,573 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:26,573 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:26,575 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:26,582 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:26,583 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:26,583 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:26,645 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:26,645 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480522235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:26,645 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:26,645 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:26,645 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2060263237] [2021-06-05 15:14:26,645 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:26,645 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:26,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:26,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:26,646 INFO L87 Difference]: Start difference. First operand 4559 states and 19384 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:27,614 INFO L93 Difference]: Finished difference Result 5721 states and 23885 transitions. [2021-06-05 15:14:27,614 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:14:27,614 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:27,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:27,624 INFO L225 Difference]: With dead ends: 5721 [2021-06-05 15:14:27,625 INFO L226 Difference]: Without dead ends: 5656 [2021-06-05 15:14:27,625 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 715.2ms TimeCoverageRelationStatistics Valid=207, Invalid=1353, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:14:27,630 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5656 states. [2021-06-05 15:14:27,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5656 to 4561. [2021-06-05 15:14:27,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.25219298245614) internal successors, (19390), 4560 states have internal predecessors, (19390), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19390 transitions. [2021-06-05 15:14:27,690 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19390 transitions. Word has length 23 [2021-06-05 15:14:27,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:27,691 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 19390 transitions. [2021-06-05 15:14:27,691 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:27,691 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19390 transitions. [2021-06-05 15:14:27,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:27,697 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:27,697 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:27,897 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 599 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1303 [2021-06-05 15:14:27,897 INFO L430 AbstractCegarLoop]: === Iteration 600 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:27,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:27,897 INFO L82 PathProgramCache]: Analyzing trace with hash 303639337, now seen corresponding path program 23 times [2021-06-05 15:14:27,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:27,897 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591486627] [2021-06-05 15:14:27,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:27,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:27,993 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:27,993 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:27,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591486627] [2021-06-05 15:14:27,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591486627] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:27,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749948807] [2021-06-05 15:14:27,994 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 600 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:28,018 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:28,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:28,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:28,019 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:28,111 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:28,111 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:28,112 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:28,120 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:28,120 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:28,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:28,204 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:28,204 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749948807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:28,204 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:28,204 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:28,204 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108260287] [2021-06-05 15:14:28,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:28,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:28,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:28,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:28,204 INFO L87 Difference]: Start difference. First operand 4561 states and 19390 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:29,206 INFO L93 Difference]: Finished difference Result 5380 states and 22537 transitions. [2021-06-05 15:14:29,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:14:29,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:29,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:29,215 INFO L225 Difference]: With dead ends: 5380 [2021-06-05 15:14:29,215 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 15:14:29,215 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 710.2ms TimeCoverageRelationStatistics Valid=185, Invalid=1147, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:14:29,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 15:14:29,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4563. [2021-06-05 15:14:29,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4563 states, 4562 states have (on average 4.251644015782552) internal successors, (19396), 4562 states have internal predecessors, (19396), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4563 states to 4563 states and 19396 transitions. [2021-06-05 15:14:29,277 INFO L78 Accepts]: Start accepts. Automaton has 4563 states and 19396 transitions. Word has length 23 [2021-06-05 15:14:29,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:29,277 INFO L482 AbstractCegarLoop]: Abstraction has 4563 states and 19396 transitions. [2021-06-05 15:14:29,277 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:29,277 INFO L276 IsEmpty]: Start isEmpty. Operand 4563 states and 19396 transitions. [2021-06-05 15:14:29,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:29,283 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:29,283 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:29,484 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 600 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1305 [2021-06-05 15:14:29,484 INFO L430 AbstractCegarLoop]: === Iteration 601 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:29,484 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:29,484 INFO L82 PathProgramCache]: Analyzing trace with hash 1917206071, now seen corresponding path program 24 times [2021-06-05 15:14:29,484 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:29,484 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988876879] [2021-06-05 15:14:29,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:29,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:29,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:29,587 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:29,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988876879] [2021-06-05 15:14:29,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988876879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:29,587 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479560297] [2021-06-05 15:14:29,587 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 601 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:29,649 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:14:29,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:29,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:29,650 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:29,744 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:29,744 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:29,745 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:29,752 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:29,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:29,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:29,834 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:29,834 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [479560297] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:29,834 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:29,835 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:29,835 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085000172] [2021-06-05 15:14:29,835 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:29,835 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:29,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:29,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:29,835 INFO L87 Difference]: Start difference. First operand 4563 states and 19396 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:30,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:30,745 INFO L93 Difference]: Finished difference Result 5341 states and 22402 transitions. [2021-06-05 15:14:30,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:30,745 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:30,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:30,754 INFO L225 Difference]: With dead ends: 5341 [2021-06-05 15:14:30,754 INFO L226 Difference]: Without dead ends: 5299 [2021-06-05 15:14:30,754 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 193 ImplicationChecksByTransitivity, 676.0ms TimeCoverageRelationStatistics Valid=160, Invalid=962, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:14:30,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5299 states. [2021-06-05 15:14:30,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5299 to 4555. [2021-06-05 15:14:30,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 4.2516469038208164) internal successors, (19362), 4554 states have internal predecessors, (19362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:30,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 19362 transitions. [2021-06-05 15:14:30,817 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 19362 transitions. Word has length 23 [2021-06-05 15:14:30,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:30,817 INFO L482 AbstractCegarLoop]: Abstraction has 4555 states and 19362 transitions. [2021-06-05 15:14:30,817 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:30,817 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 19362 transitions. [2021-06-05 15:14:30,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:30,823 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:30,823 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:31,023 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1307,601 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:31,023 INFO L430 AbstractCegarLoop]: === Iteration 602 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:31,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:31,024 INFO L82 PathProgramCache]: Analyzing trace with hash 2008351145, now seen corresponding path program 25 times [2021-06-05 15:14:31,024 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:31,024 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1174744351] [2021-06-05 15:14:31,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:31,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:31,120 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:31,120 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1174744351] [2021-06-05 15:14:31,120 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1174744351] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:31,120 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616787117] [2021-06-05 15:14:31,120 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 602 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:31,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:31,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:31,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:31,221 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:31,221 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:31,222 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:31,231 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:31,231 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:31,231 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:31,338 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:31,338 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616787117] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:31,338 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:31,338 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:31,338 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509173226] [2021-06-05 15:14:31,338 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:31,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:31,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:31,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:31,339 INFO L87 Difference]: Start difference. First operand 4555 states and 19362 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:32,156 INFO L93 Difference]: Finished difference Result 5073 states and 21348 transitions. [2021-06-05 15:14:32,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:32,156 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:32,156 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:32,165 INFO L225 Difference]: With dead ends: 5073 [2021-06-05 15:14:32,165 INFO L226 Difference]: Without dead ends: 5047 [2021-06-05 15:14:32,165 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 634.4ms TimeCoverageRelationStatistics Valid=172, Invalid=1018, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:14:32,170 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5047 states. [2021-06-05 15:14:32,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5047 to 4564. [2021-06-05 15:14:32,218 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4564 states, 4563 states have (on average 4.250273942581635) internal successors, (19394), 4563 states have internal predecessors, (19394), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4564 states to 4564 states and 19394 transitions. [2021-06-05 15:14:32,229 INFO L78 Accepts]: Start accepts. Automaton has 4564 states and 19394 transitions. Word has length 23 [2021-06-05 15:14:32,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:32,229 INFO L482 AbstractCegarLoop]: Abstraction has 4564 states and 19394 transitions. [2021-06-05 15:14:32,229 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:32,229 INFO L276 IsEmpty]: Start isEmpty. Operand 4564 states and 19394 transitions. [2021-06-05 15:14:32,235 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:32,235 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:32,235 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:32,435 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1309,602 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:32,436 INFO L430 AbstractCegarLoop]: === Iteration 603 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:32,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:32,436 INFO L82 PathProgramCache]: Analyzing trace with hash 966775077, now seen corresponding path program 26 times [2021-06-05 15:14:32,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:32,436 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000080658] [2021-06-05 15:14:32,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:32,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:32,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:32,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:32,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000080658] [2021-06-05 15:14:32,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1000080658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:32,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065018770] [2021-06-05 15:14:32,530 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 603 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:32,554 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:32,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:32,554 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:32,555 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:32,628 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:32,628 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:32,629 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:32,638 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:32,638 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:32,638 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:32,740 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:32,740 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1065018770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:32,740 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:32,740 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:32,740 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763977314] [2021-06-05 15:14:32,740 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:32,740 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:32,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:32,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:32,741 INFO L87 Difference]: Start difference. First operand 4564 states and 19394 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:33,410 INFO L93 Difference]: Finished difference Result 5061 states and 21291 transitions. [2021-06-05 15:14:33,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:14:33,410 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:33,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:33,420 INFO L225 Difference]: With dead ends: 5061 [2021-06-05 15:14:33,420 INFO L226 Difference]: Without dead ends: 5033 [2021-06-05 15:14:33,420 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 593.4ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:14:33,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5033 states. [2021-06-05 15:14:33,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5033 to 4557. [2021-06-05 15:14:33,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 4.25153643546971) internal successors, (19370), 4556 states have internal predecessors, (19370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:33,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 19370 transitions. [2021-06-05 15:14:33,487 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 19370 transitions. Word has length 23 [2021-06-05 15:14:33,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:33,487 INFO L482 AbstractCegarLoop]: Abstraction has 4557 states and 19370 transitions. [2021-06-05 15:14:33,487 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:33,487 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 19370 transitions. [2021-06-05 15:14:33,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:33,493 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:33,493 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:33,693 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 603 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1311 [2021-06-05 15:14:33,693 INFO L430 AbstractCegarLoop]: === Iteration 604 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:33,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:33,693 INFO L82 PathProgramCache]: Analyzing trace with hash 679653725, now seen corresponding path program 27 times [2021-06-05 15:14:33,693 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:33,694 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [196326220] [2021-06-05 15:14:33,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:33,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:33,799 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:33,799 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:33,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [196326220] [2021-06-05 15:14:33,799 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [196326220] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:33,799 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226966196] [2021-06-05 15:14:33,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 604 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:33,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-06-05 15:14:33,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:33,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:33,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:33,902 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:33,902 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:33,903 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:33,912 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:33,912 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:33,913 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:34,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:34,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [226966196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:34,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:34,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:34,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959443539] [2021-06-05 15:14:34,019 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:34,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:34,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:34,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:34,020 INFO L87 Difference]: Start difference. First operand 4557 states and 19370 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:34,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:34,834 INFO L93 Difference]: Finished difference Result 5049 states and 21253 transitions. [2021-06-05 15:14:34,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:14:34,834 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:34,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:34,843 INFO L225 Difference]: With dead ends: 5049 [2021-06-05 15:14:34,843 INFO L226 Difference]: Without dead ends: 5023 [2021-06-05 15:14:34,843 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 629.0ms TimeCoverageRelationStatistics Valid=166, Invalid=956, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:14:34,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5023 states. [2021-06-05 15:14:34,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5023 to 4561. [2021-06-05 15:14:34,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.251315789473685) internal successors, (19386), 4560 states have internal predecessors, (19386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:34,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19386 transitions. [2021-06-05 15:14:34,904 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19386 transitions. Word has length 23 [2021-06-05 15:14:34,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:34,905 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 19386 transitions. [2021-06-05 15:14:34,905 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:34,905 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19386 transitions. [2021-06-05 15:14:34,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:34,911 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:34,911 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:35,111 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1313,604 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:35,111 INFO L430 AbstractCegarLoop]: === Iteration 605 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:35,111 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:35,111 INFO L82 PathProgramCache]: Analyzing trace with hash 186436339, now seen corresponding path program 28 times [2021-06-05 15:14:35,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:35,112 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722694293] [2021-06-05 15:14:35,112 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:35,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:35,217 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:35,217 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:35,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722694293] [2021-06-05 15:14:35,217 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722694293] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:35,217 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128587773] [2021-06-05 15:14:35,218 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 605 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:35,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:35,240 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:35,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:35,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:35,318 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:35,318 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:35,319 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:35,328 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:35,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:35,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:35,432 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:35,432 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1128587773] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:35,432 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:35,432 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:35,432 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931880630] [2021-06-05 15:14:35,432 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:35,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:35,433 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:35,433 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:35,433 INFO L87 Difference]: Start difference. First operand 4561 states and 19386 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:36,078 INFO L93 Difference]: Finished difference Result 4987 states and 21015 transitions. [2021-06-05 15:14:36,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:14:36,078 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:36,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:36,087 INFO L225 Difference]: With dead ends: 4987 [2021-06-05 15:14:36,087 INFO L226 Difference]: Without dead ends: 4966 [2021-06-05 15:14:36,087 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 568.1ms TimeCoverageRelationStatistics Valid=142, Invalid=788, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:14:36,092 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4966 states. [2021-06-05 15:14:36,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4966 to 4557. [2021-06-05 15:14:36,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4557 states, 4556 states have (on average 4.25153643546971) internal successors, (19370), 4556 states have internal predecessors, (19370), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4557 states to 4557 states and 19370 transitions. [2021-06-05 15:14:36,149 INFO L78 Accepts]: Start accepts. Automaton has 4557 states and 19370 transitions. Word has length 23 [2021-06-05 15:14:36,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:36,149 INFO L482 AbstractCegarLoop]: Abstraction has 4557 states and 19370 transitions. [2021-06-05 15:14:36,149 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:36,149 INFO L276 IsEmpty]: Start isEmpty. Operand 4557 states and 19370 transitions. [2021-06-05 15:14:36,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:36,156 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:36,156 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:36,356 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 605 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1315 [2021-06-05 15:14:36,356 INFO L430 AbstractCegarLoop]: === Iteration 606 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:36,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:36,357 INFO L82 PathProgramCache]: Analyzing trace with hash 1121212595, now seen corresponding path program 29 times [2021-06-05 15:14:36,357 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:36,357 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696348247] [2021-06-05 15:14:36,357 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:36,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:36,451 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:36,452 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:36,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696348247] [2021-06-05 15:14:36,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696348247] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:36,452 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60206023] [2021-06-05 15:14:36,452 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 606 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:36,476 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:36,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:36,477 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:36,477 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:36,554 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:36,554 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:36,555 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:36,564 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:36,564 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:36,564 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:36,666 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:36,666 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60206023] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:36,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:36,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:36,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1361178479] [2021-06-05 15:14:36,667 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:36,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:36,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:36,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:36,667 INFO L87 Difference]: Start difference. First operand 4557 states and 19370 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:37,334 INFO L93 Difference]: Finished difference Result 5075 states and 21354 transitions. [2021-06-05 15:14:37,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:37,334 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:37,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:37,343 INFO L225 Difference]: With dead ends: 5075 [2021-06-05 15:14:37,343 INFO L226 Difference]: Without dead ends: 5050 [2021-06-05 15:14:37,343 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 596.0ms TimeCoverageRelationStatistics Valid=164, Invalid=892, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:14:37,348 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5050 states. [2021-06-05 15:14:37,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5050 to 4561. [2021-06-05 15:14:37,397 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4561 states, 4560 states have (on average 4.251315789473685) internal successors, (19386), 4560 states have internal predecessors, (19386), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:37,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4561 states to 4561 states and 19386 transitions. [2021-06-05 15:14:37,409 INFO L78 Accepts]: Start accepts. Automaton has 4561 states and 19386 transitions. Word has length 23 [2021-06-05 15:14:37,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:37,409 INFO L482 AbstractCegarLoop]: Abstraction has 4561 states and 19386 transitions. [2021-06-05 15:14:37,409 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:37,409 INFO L276 IsEmpty]: Start isEmpty. Operand 4561 states and 19386 transitions. [2021-06-05 15:14:37,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:37,415 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:37,415 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:37,616 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1317,606 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:37,616 INFO L430 AbstractCegarLoop]: === Iteration 607 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:37,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:37,616 INFO L82 PathProgramCache]: Analyzing trace with hash 108520063, now seen corresponding path program 30 times [2021-06-05 15:14:37,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:37,616 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040441753] [2021-06-05 15:14:37,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:37,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:37,711 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:37,712 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:37,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040441753] [2021-06-05 15:14:37,712 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040441753] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:37,712 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664365851] [2021-06-05 15:14:37,712 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 607 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:37,735 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:14:37,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:37,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:37,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:37,818 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:37,819 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:14:37,820 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:37,829 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:37,829 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:37,829 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:14:37,938 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:37,939 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1664365851] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:37,939 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:37,939 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:37,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561212367] [2021-06-05 15:14:37,939 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:37,939 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:37,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:37,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:37,939 INFO L87 Difference]: Start difference. First operand 4561 states and 19386 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:38,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:38,614 INFO L93 Difference]: Finished difference Result 5010 states and 21107 transitions. [2021-06-05 15:14:38,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:38,615 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:38,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:38,623 INFO L225 Difference]: With dead ends: 5010 [2021-06-05 15:14:38,624 INFO L226 Difference]: Without dead ends: 4989 [2021-06-05 15:14:38,624 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 614.6ms TimeCoverageRelationStatistics Valid=155, Invalid=901, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:14:38,628 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4989 states. [2021-06-05 15:14:38,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4989 to 4555. [2021-06-05 15:14:38,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4555 states, 4554 states have (on average 4.2516469038208164) internal successors, (19362), 4554 states have internal predecessors, (19362), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:38,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4555 states to 4555 states and 19362 transitions. [2021-06-05 15:14:38,686 INFO L78 Accepts]: Start accepts. Automaton has 4555 states and 19362 transitions. Word has length 23 [2021-06-05 15:14:38,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:38,686 INFO L482 AbstractCegarLoop]: Abstraction has 4555 states and 19362 transitions. [2021-06-05 15:14:38,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:38,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4555 states and 19362 transitions. [2021-06-05 15:14:38,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:38,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:38,692 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:38,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 607 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1319 [2021-06-05 15:14:38,893 INFO L430 AbstractCegarLoop]: === Iteration 608 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:38,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:38,893 INFO L82 PathProgramCache]: Analyzing trace with hash -576423299, now seen corresponding path program 11 times [2021-06-05 15:14:38,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:38,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1833162085] [2021-06-05 15:14:38,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:38,974 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:38,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1833162085] [2021-06-05 15:14:38,974 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1833162085] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:38,974 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025999400] [2021-06-05 15:14:38,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 608 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:38,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:14:38,999 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:38,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:38,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:39,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:39,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:39,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:39,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:39,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:39,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:39,185 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:39,185 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2025999400] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:39,185 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:39,185 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:39,185 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926286345] [2021-06-05 15:14:39,185 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:39,185 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:39,185 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:39,185 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:39,185 INFO L87 Difference]: Start difference. First operand 4555 states and 19362 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:40,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:40,021 INFO L93 Difference]: Finished difference Result 5307 states and 22252 transitions. [2021-06-05 15:14:40,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:14:40,021 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:40,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:40,031 INFO L225 Difference]: With dead ends: 5307 [2021-06-05 15:14:40,031 INFO L226 Difference]: Without dead ends: 5298 [2021-06-05 15:14:40,031 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 616.0ms TimeCoverageRelationStatistics Valid=179, Invalid=1227, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:14:40,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5298 states. [2021-06-05 15:14:40,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5298 to 4579. [2021-06-05 15:14:40,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4579 states, 4578 states have (on average 4.254914809960682) internal successors, (19479), 4578 states have internal predecessors, (19479), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:40,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4579 states to 4579 states and 19479 transitions. [2021-06-05 15:14:40,096 INFO L78 Accepts]: Start accepts. Automaton has 4579 states and 19479 transitions. Word has length 23 [2021-06-05 15:14:40,096 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:40,096 INFO L482 AbstractCegarLoop]: Abstraction has 4579 states and 19479 transitions. [2021-06-05 15:14:40,096 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:40,096 INFO L276 IsEmpty]: Start isEmpty. Operand 4579 states and 19479 transitions. [2021-06-05 15:14:40,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:40,102 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:40,102 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:40,302 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 608 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1321 [2021-06-05 15:14:40,302 INFO L430 AbstractCegarLoop]: === Iteration 609 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:40,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:40,303 INFO L82 PathProgramCache]: Analyzing trace with hash 1606115367, now seen corresponding path program 12 times [2021-06-05 15:14:40,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:40,303 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842696879] [2021-06-05 15:14:40,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:40,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:40,387 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:40,387 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:40,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842696879] [2021-06-05 15:14:40,387 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842696879] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:40,387 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [473848718] [2021-06-05 15:14:40,387 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 609 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:40,410 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:14:40,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:40,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 34 conjunts are in the unsatisfiable core [2021-06-05 15:14:40,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:40,526 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:14:40,526 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:14:40,530 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:14:40,551 INFO L628 ElimStorePlain]: treesize reduction 55, result has 23.6 percent of original size [2021-06-05 15:14:40,551 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:40,551 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 15:14:40,590 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:40,590 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [473848718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:40,590 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:40,590 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:40,590 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845663162] [2021-06-05 15:14:40,590 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:40,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:40,590 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:40,590 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:40,590 INFO L87 Difference]: Start difference. First operand 4579 states and 19479 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:41,115 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:41,116 INFO L93 Difference]: Finished difference Result 5084 states and 21423 transitions. [2021-06-05 15:14:41,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:14:41,116 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:41,116 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:41,125 INFO L225 Difference]: With dead ends: 5084 [2021-06-05 15:14:41,125 INFO L226 Difference]: Without dead ends: 5075 [2021-06-05 15:14:41,125 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 324.6ms TimeCoverageRelationStatistics Valid=93, Invalid=609, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:14:41,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5075 states. [2021-06-05 15:14:41,172 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5075 to 4585. [2021-06-05 15:14:41,175 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4585 states, 4584 states have (on average 4.25458115183246) internal successors, (19503), 4584 states have internal predecessors, (19503), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:41,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4585 states to 4585 states and 19503 transitions. [2021-06-05 15:14:41,185 INFO L78 Accepts]: Start accepts. Automaton has 4585 states and 19503 transitions. Word has length 23 [2021-06-05 15:14:41,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:41,185 INFO L482 AbstractCegarLoop]: Abstraction has 4585 states and 19503 transitions. [2021-06-05 15:14:41,185 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:41,185 INFO L276 IsEmpty]: Start isEmpty. Operand 4585 states and 19503 transitions. [2021-06-05 15:14:41,191 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:41,191 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:41,191 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:41,392 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 609 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1323 [2021-06-05 15:14:41,392 INFO L430 AbstractCegarLoop]: === Iteration 610 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:41,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:41,392 INFO L82 PathProgramCache]: Analyzing trace with hash 277417947, now seen corresponding path program 13 times [2021-06-05 15:14:41,392 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:41,392 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [737460694] [2021-06-05 15:14:41,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:41,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:41,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:41,482 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:41,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [737460694] [2021-06-05 15:14:41,482 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [737460694] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:41,482 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271111213] [2021-06-05 15:14:41,482 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 610 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:41,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:41,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:41,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:41,611 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:41,611 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:41,613 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:41,620 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:41,621 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:41,621 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:41,682 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:41,682 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271111213] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:41,682 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:41,682 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:41,682 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691443307] [2021-06-05 15:14:41,682 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:41,682 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:41,682 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:41,682 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:41,682 INFO L87 Difference]: Start difference. First operand 4585 states and 19503 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:42,616 INFO L93 Difference]: Finished difference Result 5838 states and 24373 transitions. [2021-06-05 15:14:42,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:14:42,616 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:42,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:42,626 INFO L225 Difference]: With dead ends: 5838 [2021-06-05 15:14:42,626 INFO L226 Difference]: Without dead ends: 5820 [2021-06-05 15:14:42,627 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 316 ImplicationChecksByTransitivity, 612.7ms TimeCoverageRelationStatistics Valid=178, Invalid=1228, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:14:42,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5820 states. [2021-06-05 15:14:42,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5820 to 4618. [2021-06-05 15:14:42,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4618 states, 4617 states have (on average 4.258609486679662) internal successors, (19662), 4617 states have internal predecessors, (19662), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4618 states to 4618 states and 19662 transitions. [2021-06-05 15:14:42,694 INFO L78 Accepts]: Start accepts. Automaton has 4618 states and 19662 transitions. Word has length 23 [2021-06-05 15:14:42,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:42,694 INFO L482 AbstractCegarLoop]: Abstraction has 4618 states and 19662 transitions. [2021-06-05 15:14:42,694 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:42,694 INFO L276 IsEmpty]: Start isEmpty. Operand 4618 states and 19662 transitions. [2021-06-05 15:14:42,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:42,700 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:42,700 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:42,900 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1327,610 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:42,901 INFO L430 AbstractCegarLoop]: === Iteration 611 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:42,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:42,901 INFO L82 PathProgramCache]: Analyzing trace with hash 865163269, now seen corresponding path program 14 times [2021-06-05 15:14:42,901 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:42,901 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907296935] [2021-06-05 15:14:42,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:42,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:42,994 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:42,994 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:42,994 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907296935] [2021-06-05 15:14:42,994 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907296935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:42,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [87702233] [2021-06-05 15:14:42,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 611 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:43,017 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:43,018 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:43,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:43,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:43,112 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:43,112 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:43,113 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:43,121 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:43,121 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:43,121 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:43,203 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:43,203 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [87702233] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:43,203 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:43,203 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:43,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627633788] [2021-06-05 15:14:43,204 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:43,204 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:43,204 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:43,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:43,204 INFO L87 Difference]: Start difference. First operand 4618 states and 19662 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:44,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:44,135 INFO L93 Difference]: Finished difference Result 5534 states and 23202 transitions. [2021-06-05 15:14:44,135 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:14:44,135 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:44,135 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:44,145 INFO L225 Difference]: With dead ends: 5534 [2021-06-05 15:14:44,145 INFO L226 Difference]: Without dead ends: 5516 [2021-06-05 15:14:44,145 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 307 ImplicationChecksByTransitivity, 705.6ms TimeCoverageRelationStatistics Valid=187, Invalid=1295, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:14:44,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5516 states. [2021-06-05 15:14:44,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5516 to 4648. [2021-06-05 15:14:44,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4648 states, 4647 states have (on average 4.262104583602324) internal successors, (19806), 4647 states have internal predecessors, (19806), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:44,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4648 states to 4648 states and 19806 transitions. [2021-06-05 15:14:44,212 INFO L78 Accepts]: Start accepts. Automaton has 4648 states and 19806 transitions. Word has length 23 [2021-06-05 15:14:44,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:44,212 INFO L482 AbstractCegarLoop]: Abstraction has 4648 states and 19806 transitions. [2021-06-05 15:14:44,212 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:44,212 INFO L276 IsEmpty]: Start isEmpty. Operand 4648 states and 19806 transitions. [2021-06-05 15:14:44,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:44,218 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:44,218 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:44,418 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1329,611 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:44,418 INFO L430 AbstractCegarLoop]: === Iteration 612 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:44,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:44,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1940874425, now seen corresponding path program 15 times [2021-06-05 15:14:44,419 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:44,419 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582596058] [2021-06-05 15:14:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:44,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:44,513 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:44,513 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:44,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582596058] [2021-06-05 15:14:44,513 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582596058] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:44,513 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302136902] [2021-06-05 15:14:44,513 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 612 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:44,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:14:44,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:44,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:44,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:44,665 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:44,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:44,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:44,674 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:44,675 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:44,675 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:44,758 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:44,759 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1302136902] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:44,759 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:44,759 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:14:44,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957688013] [2021-06-05 15:14:44,759 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:14:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:14:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:14:44,759 INFO L87 Difference]: Start difference. First operand 4648 states and 19806 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:45,609 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:45,609 INFO L93 Difference]: Finished difference Result 5505 states and 23133 transitions. [2021-06-05 15:14:45,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:14:45,609 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:45,609 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:45,619 INFO L225 Difference]: With dead ends: 5505 [2021-06-05 15:14:45,619 INFO L226 Difference]: Without dead ends: 5483 [2021-06-05 15:14:45,619 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 630.6ms TimeCoverageRelationStatistics Valid=148, Invalid=974, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:14:45,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5483 states. [2021-06-05 15:14:45,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5483 to 4678. [2021-06-05 15:14:45,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.264271969211033) internal successors, (19944), 4677 states have internal predecessors, (19944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:45,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19944 transitions. [2021-06-05 15:14:45,684 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19944 transitions. Word has length 23 [2021-06-05 15:14:45,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:45,684 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19944 transitions. [2021-06-05 15:14:45,684 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:45,684 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19944 transitions. [2021-06-05 15:14:45,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:45,690 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:45,691 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:45,891 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 612 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1331 [2021-06-05 15:14:45,891 INFO L430 AbstractCegarLoop]: === Iteration 613 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:45,891 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:45,891 INFO L82 PathProgramCache]: Analyzing trace with hash 200302109, now seen corresponding path program 31 times [2021-06-05 15:14:45,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:45,891 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [204910173] [2021-06-05 15:14:45,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:45,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:46,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:46,002 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:46,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [204910173] [2021-06-05 15:14:46,002 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [204910173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:46,002 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1175016430] [2021-06-05 15:14:46,002 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 613 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:46,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:46,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:46,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:46,115 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:46,115 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:46,116 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:46,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:46,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:46,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:46,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:46,183 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1175016430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:46,183 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:46,183 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:46,183 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [349161154] [2021-06-05 15:14:46,183 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:46,183 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:46,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:46,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:46,183 INFO L87 Difference]: Start difference. First operand 4678 states and 19944 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:47,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:47,296 INFO L93 Difference]: Finished difference Result 5988 states and 25032 transitions. [2021-06-05 15:14:47,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:14:47,296 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:47,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:47,307 INFO L225 Difference]: With dead ends: 5988 [2021-06-05 15:14:47,307 INFO L226 Difference]: Without dead ends: 5944 [2021-06-05 15:14:47,307 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 823.1ms TimeCoverageRelationStatistics Valid=237, Invalid=1169, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:14:47,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5944 states. [2021-06-05 15:14:47,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5944 to 4680. [2021-06-05 15:14:47,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4680 states, 4679 states have (on average 4.264372729215644) internal successors, (19953), 4679 states have internal predecessors, (19953), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:47,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4680 states to 4680 states and 19953 transitions. [2021-06-05 15:14:47,375 INFO L78 Accepts]: Start accepts. Automaton has 4680 states and 19953 transitions. Word has length 23 [2021-06-05 15:14:47,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:47,375 INFO L482 AbstractCegarLoop]: Abstraction has 4680 states and 19953 transitions. [2021-06-05 15:14:47,375 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:47,375 INFO L276 IsEmpty]: Start isEmpty. Operand 4680 states and 19953 transitions. [2021-06-05 15:14:47,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:47,381 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:47,381 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:47,582 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 613 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1333 [2021-06-05 15:14:47,582 INFO L430 AbstractCegarLoop]: === Iteration 614 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:47,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:47,582 INFO L82 PathProgramCache]: Analyzing trace with hash 785636061, now seen corresponding path program 32 times [2021-06-05 15:14:47,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:47,582 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441463427] [2021-06-05 15:14:47,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:47,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:47,692 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:47,692 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441463427] [2021-06-05 15:14:47,692 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [441463427] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:47,692 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1683315377] [2021-06-05 15:14:47,692 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 614 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:47,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:47,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:47,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:47,715 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:47,791 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:47,791 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:47,792 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:47,800 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:47,800 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:47,800 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:47,878 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:47,878 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1683315377] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:47,878 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:47,879 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:47,879 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [882087723] [2021-06-05 15:14:47,879 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:47,879 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:47,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:47,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:47,879 INFO L87 Difference]: Start difference. First operand 4680 states and 19953 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:48,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:48,663 INFO L93 Difference]: Finished difference Result 5759 states and 24105 transitions. [2021-06-05 15:14:48,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:14:48,663 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:48,663 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:48,673 INFO L225 Difference]: With dead ends: 5759 [2021-06-05 15:14:48,673 INFO L226 Difference]: Without dead ends: 5707 [2021-06-05 15:14:48,674 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 242 ImplicationChecksByTransitivity, 629.7ms TimeCoverageRelationStatistics Valid=197, Invalid=993, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:14:48,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5707 states. [2021-06-05 15:14:48,726 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5707 to 4684. [2021-06-05 15:14:48,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4684 states, 4683 states have (on average 4.26457399103139) internal successors, (19971), 4683 states have internal predecessors, (19971), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:48,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4684 states to 4684 states and 19971 transitions. [2021-06-05 15:14:48,741 INFO L78 Accepts]: Start accepts. Automaton has 4684 states and 19971 transitions. Word has length 23 [2021-06-05 15:14:48,741 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:48,741 INFO L482 AbstractCegarLoop]: Abstraction has 4684 states and 19971 transitions. [2021-06-05 15:14:48,741 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:48,741 INFO L276 IsEmpty]: Start isEmpty. Operand 4684 states and 19971 transitions. [2021-06-05 15:14:48,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:48,748 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:48,748 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:48,948 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1335,614 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:48,948 INFO L430 AbstractCegarLoop]: === Iteration 615 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:48,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:48,948 INFO L82 PathProgramCache]: Analyzing trace with hash -1895764501, now seen corresponding path program 33 times [2021-06-05 15:14:48,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:48,948 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1024609952] [2021-06-05 15:14:48,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:48,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:49,059 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:49,060 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:49,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1024609952] [2021-06-05 15:14:49,060 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1024609952] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:49,060 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [206763177] [2021-06-05 15:14:49,060 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 615 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:49,083 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:49,083 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:49,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:49,160 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:49,160 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:49,161 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:49,169 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:49,169 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:49,169 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:49,248 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:49,248 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [206763177] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:49,248 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:49,248 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:49,248 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [53217376] [2021-06-05 15:14:49,248 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:49,248 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:49,249 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:49,249 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:49,249 INFO L87 Difference]: Start difference. First operand 4684 states and 19971 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:50,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:50,470 INFO L93 Difference]: Finished difference Result 5642 states and 23624 transitions. [2021-06-05 15:14:50,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:14:50,470 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:50,471 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:50,481 INFO L225 Difference]: With dead ends: 5642 [2021-06-05 15:14:50,481 INFO L226 Difference]: Without dead ends: 5600 [2021-06-05 15:14:50,481 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 327 ImplicationChecksByTransitivity, 992.7ms TimeCoverageRelationStatistics Valid=249, Invalid=1233, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:14:50,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5600 states. [2021-06-05 15:14:50,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5600 to 4672. [2021-06-05 15:14:50,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.264397345322201) internal successors, (19919), 4671 states have internal predecessors, (19919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:50,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19919 transitions. [2021-06-05 15:14:50,547 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19919 transitions. Word has length 23 [2021-06-05 15:14:50,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:50,547 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19919 transitions. [2021-06-05 15:14:50,547 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:50,547 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19919 transitions. [2021-06-05 15:14:50,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:50,553 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:50,553 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:50,754 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 615 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1337 [2021-06-05 15:14:50,754 INFO L430 AbstractCegarLoop]: === Iteration 616 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:50,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:50,754 INFO L82 PathProgramCache]: Analyzing trace with hash -26919271, now seen corresponding path program 34 times [2021-06-05 15:14:50,754 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:50,754 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1490196128] [2021-06-05 15:14:50,754 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:50,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:50,866 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:50,866 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:50,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1490196128] [2021-06-05 15:14:50,866 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1490196128] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:50,866 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1456804987] [2021-06-05 15:14:50,866 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 616 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:50,888 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:50,888 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:50,889 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:50,889 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:50,981 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:50,981 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:14:50,982 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:50,990 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:50,990 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:50,990 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:14:51,050 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:51,050 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1456804987] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:51,050 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:51,050 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:51,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1039468328] [2021-06-05 15:14:51,050 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:51,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:51,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:51,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:51,051 INFO L87 Difference]: Start difference. First operand 4672 states and 19919 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:51,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:51,994 INFO L93 Difference]: Finished difference Result 5986 states and 25057 transitions. [2021-06-05 15:14:51,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:14:51,994 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:51,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:52,005 INFO L225 Difference]: With dead ends: 5986 [2021-06-05 15:14:52,005 INFO L226 Difference]: Without dead ends: 5942 [2021-06-05 15:14:52,005 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 723.9ms TimeCoverageRelationStatistics Valid=192, Invalid=1068, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:14:52,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5942 states. [2021-06-05 15:14:52,060 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5942 to 4674. [2021-06-05 15:14:52,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.26407019045581) internal successors, (19926), 4673 states have internal predecessors, (19926), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:52,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19926 transitions. [2021-06-05 15:14:52,075 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19926 transitions. Word has length 23 [2021-06-05 15:14:52,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:52,075 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19926 transitions. [2021-06-05 15:14:52,075 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:52,075 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19926 transitions. [2021-06-05 15:14:52,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:52,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:52,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:52,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1339,616 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:52,282 INFO L430 AbstractCegarLoop]: === Iteration 617 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:52,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:52,282 INFO L82 PathProgramCache]: Analyzing trace with hash 486607581, now seen corresponding path program 35 times [2021-06-05 15:14:52,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:52,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232481540] [2021-06-05 15:14:52,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:52,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:52,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:52,405 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:52,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232481540] [2021-06-05 15:14:52,405 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232481540] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,405 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1576527946] [2021-06-05 15:14:52,405 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 617 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:52,455 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:52,455 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:52,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:14:52,456 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:52,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:52,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:52,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,542 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:52,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:52,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:52,622 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1576527946] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:52,622 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:52,622 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:52,622 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1156603158] [2021-06-05 15:14:52,622 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:52,622 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:52,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:52,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:52,623 INFO L87 Difference]: Start difference. First operand 4674 states and 19926 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:53,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:53,610 INFO L93 Difference]: Finished difference Result 5719 states and 23966 transitions. [2021-06-05 15:14:53,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:14:53,610 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:53,610 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:53,620 INFO L225 Difference]: With dead ends: 5719 [2021-06-05 15:14:53,620 INFO L226 Difference]: Without dead ends: 5669 [2021-06-05 15:14:53,620 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 761.5ms TimeCoverageRelationStatistics Valid=223, Invalid=1259, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:14:53,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5669 states. [2021-06-05 15:14:53,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5669 to 4678. [2021-06-05 15:14:53,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.264271969211033) internal successors, (19944), 4677 states have internal predecessors, (19944), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:53,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19944 transitions. [2021-06-05 15:14:53,686 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19944 transitions. Word has length 23 [2021-06-05 15:14:53,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:53,686 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19944 transitions. [2021-06-05 15:14:53,686 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:53,686 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19944 transitions. [2021-06-05 15:14:53,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:53,692 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:53,692 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:53,892 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 617 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1341 [2021-06-05 15:14:53,893 INFO L430 AbstractCegarLoop]: === Iteration 618 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:53,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:53,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1562318737, now seen corresponding path program 36 times [2021-06-05 15:14:53,893 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:53,893 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829335680] [2021-06-05 15:14:53,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:54,015 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:54,015 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:54,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829335680] [2021-06-05 15:14:54,015 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829335680] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:54,015 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230085102] [2021-06-05 15:14:54,016 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 618 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:54,038 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-06-05 15:14:54,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:54,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:54,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:54,116 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:54,117 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:54,118 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:54,125 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:54,126 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:54,126 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:14:54,205 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:54,205 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1230085102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:54,205 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:54,205 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:54,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759107482] [2021-06-05 15:14:54,205 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:54,205 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:54,205 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:54,205 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:54,205 INFO L87 Difference]: Start difference. First operand 4678 states and 19944 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:55,154 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:55,154 INFO L93 Difference]: Finished difference Result 5596 states and 23481 transitions. [2021-06-05 15:14:55,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:14:55,155 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:55,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:55,166 INFO L225 Difference]: With dead ends: 5596 [2021-06-05 15:14:55,166 INFO L226 Difference]: Without dead ends: 5554 [2021-06-05 15:14:55,166 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 815.5ms TimeCoverageRelationStatistics Valid=184, Invalid=872, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:14:55,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5554 states. [2021-06-05 15:14:55,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5554 to 4672. [2021-06-05 15:14:55,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.264397345322201) internal successors, (19919), 4671 states have internal predecessors, (19919), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:55,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19919 transitions. [2021-06-05 15:14:55,237 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19919 transitions. Word has length 23 [2021-06-05 15:14:55,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:55,237 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19919 transitions. [2021-06-05 15:14:55,237 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:55,237 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19919 transitions. [2021-06-05 15:14:55,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:55,243 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:55,243 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:55,456 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 618 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1343 [2021-06-05 15:14:55,457 INFO L430 AbstractCegarLoop]: === Iteration 619 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:55,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:55,457 INFO L82 PathProgramCache]: Analyzing trace with hash 1843314589, now seen corresponding path program 37 times [2021-06-05 15:14:55,457 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:55,457 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918177010] [2021-06-05 15:14:55,457 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:55,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:55,580 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:55,580 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918177010] [2021-06-05 15:14:55,580 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918177010] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:55,580 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715936689] [2021-06-05 15:14:55,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 619 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:55,602 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:55,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:55,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:55,666 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:55,666 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:55,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:55,675 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:55,676 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:55,676 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:55,776 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:55,776 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [715936689] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:55,777 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:55,777 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:55,777 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [200006745] [2021-06-05 15:14:55,777 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:55,777 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:55,777 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:55,777 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:55,777 INFO L87 Difference]: Start difference. First operand 4672 states and 19919 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:56,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:56,380 INFO L93 Difference]: Finished difference Result 5269 states and 22199 transitions. [2021-06-05 15:14:56,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:14:56,380 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:56,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:56,389 INFO L225 Difference]: With dead ends: 5269 [2021-06-05 15:14:56,389 INFO L226 Difference]: Without dead ends: 5243 [2021-06-05 15:14:56,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 538.5ms TimeCoverageRelationStatistics Valid=144, Invalid=612, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:14:56,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5243 states. [2021-06-05 15:14:56,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5243 to 4681. [2021-06-05 15:14:56,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4681 states, 4680 states have (on average 4.263034188034188) internal successors, (19951), 4680 states have internal predecessors, (19951), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:56,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4681 states to 4681 states and 19951 transitions. [2021-06-05 15:14:56,453 INFO L78 Accepts]: Start accepts. Automaton has 4681 states and 19951 transitions. Word has length 23 [2021-06-05 15:14:56,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:56,453 INFO L482 AbstractCegarLoop]: Abstraction has 4681 states and 19951 transitions. [2021-06-05 15:14:56,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:56,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4681 states and 19951 transitions. [2021-06-05 15:14:56,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:56,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:56,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:56,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 619 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1345 [2021-06-05 15:14:56,660 INFO L430 AbstractCegarLoop]: === Iteration 620 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:56,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:56,660 INFO L82 PathProgramCache]: Analyzing trace with hash 801738521, now seen corresponding path program 38 times [2021-06-05 15:14:56,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:56,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1209315200] [2021-06-05 15:14:56,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:56,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:56,784 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:56,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1209315200] [2021-06-05 15:14:56,784 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1209315200] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:56,784 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465026933] [2021-06-05 15:14:56,784 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 620 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:56,807 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:14:56,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:56,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:56,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:56,874 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:56,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:56,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:56,884 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:56,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:56,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:56,987 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:56,987 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465026933] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:56,987 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:56,988 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:56,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435076451] [2021-06-05 15:14:56,988 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:56,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:56,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:56,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:56,988 INFO L87 Difference]: Start difference. First operand 4681 states and 19951 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:57,884 INFO L93 Difference]: Finished difference Result 5205 states and 21938 transitions. [2021-06-05 15:14:57,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:14:57,884 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:57,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:57,893 INFO L225 Difference]: With dead ends: 5205 [2021-06-05 15:14:57,893 INFO L226 Difference]: Without dead ends: 5177 [2021-06-05 15:14:57,893 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 701.1ms TimeCoverageRelationStatistics Valid=179, Invalid=813, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:14:57,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5177 states. [2021-06-05 15:14:57,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5177 to 4674. [2021-06-05 15:14:57,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.264284185747914) internal successors, (19927), 4673 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19927 transitions. [2021-06-05 15:14:57,956 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19927 transitions. Word has length 23 [2021-06-05 15:14:57,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:57,957 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19927 transitions. [2021-06-05 15:14:57,957 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:57,957 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19927 transitions. [2021-06-05 15:14:57,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:57,963 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:57,963 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:58,163 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1347,620 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:58,163 INFO L430 AbstractCegarLoop]: === Iteration 621 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:58,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:58,163 INFO L82 PathProgramCache]: Analyzing trace with hash 514617169, now seen corresponding path program 39 times [2021-06-05 15:14:58,164 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:58,164 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879243883] [2021-06-05 15:14:58,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:58,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:58,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:58,284 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879243883] [2021-06-05 15:14:58,284 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1879243883] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:58,284 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1190126083] [2021-06-05 15:14:58,284 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 621 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:58,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:14:58,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:58,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:14:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:58,366 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:14:58,367 INFO L173 IndexEqualityManager]: detected equality via solver [2021-06-05 15:14:58,372 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:58,372 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 23 treesize of output 31 [2021-06-05 15:14:58,373 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:58,381 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:58,381 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:58,381 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:28 [2021-06-05 15:14:58,462 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:58,462 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1190126083] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:58,462 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:58,462 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:58,462 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1009272720] [2021-06-05 15:14:58,463 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:58,463 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:58,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:58,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=284, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:58,463 INFO L87 Difference]: Start difference. First operand 4674 states and 19927 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:58,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:14:58,990 INFO L93 Difference]: Finished difference Result 5261 states and 22169 transitions. [2021-06-05 15:14:58,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:14:58,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:14:58,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:14:58,999 INFO L225 Difference]: With dead ends: 5261 [2021-06-05 15:14:58,999 INFO L226 Difference]: Without dead ends: 5235 [2021-06-05 15:14:58,999 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 391.4ms TimeCoverageRelationStatistics Valid=114, Invalid=536, Unknown=0, NotChecked=0, Total=650 [2021-06-05 15:14:59,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5235 states. [2021-06-05 15:14:59,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5235 to 4678. [2021-06-05 15:14:59,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.2640581569382086) internal successors, (19943), 4677 states have internal predecessors, (19943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:59,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19943 transitions. [2021-06-05 15:14:59,064 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19943 transitions. Word has length 23 [2021-06-05 15:14:59,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:14:59,064 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19943 transitions. [2021-06-05 15:14:59,064 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:14:59,064 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19943 transitions. [2021-06-05 15:14:59,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:14:59,070 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:14:59,070 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:14:59,271 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1349,621 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:59,271 INFO L430 AbstractCegarLoop]: === Iteration 622 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:14:59,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:14:59,271 INFO L82 PathProgramCache]: Analyzing trace with hash 21399783, now seen corresponding path program 40 times [2021-06-05 15:14:59,271 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:14:59,271 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1603087388] [2021-06-05 15:14:59,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:14:59,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:14:59,391 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:59,391 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:14:59,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1603087388] [2021-06-05 15:14:59,391 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1603087388] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:59,391 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1629817391] [2021-06-05 15:14:59,391 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 622 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:14:59,413 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:14:59,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:14:59,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:14:59,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:14:59,477 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:59,478 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:14:59,478 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:14:59,487 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:14:59,487 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:14:59,487 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:14:59,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:14:59,587 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1629817391] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:14:59,587 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:14:59,587 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:14:59,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558522388] [2021-06-05 15:14:59,587 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:14:59,587 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:14:59,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:14:59,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:14:59,588 INFO L87 Difference]: Start difference. First operand 4678 states and 19943 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:00,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:00,568 INFO L93 Difference]: Finished difference Result 5120 states and 21612 transitions. [2021-06-05 15:15:00,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:15:00,568 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:00,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:00,577 INFO L225 Difference]: With dead ends: 5120 [2021-06-05 15:15:00,577 INFO L226 Difference]: Without dead ends: 5099 [2021-06-05 15:15:00,577 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 797.0ms TimeCoverageRelationStatistics Valid=172, Invalid=758, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:15:00,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5099 states. [2021-06-05 15:15:00,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5099 to 4674. [2021-06-05 15:15:00,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.264284185747914) internal successors, (19927), 4673 states have internal predecessors, (19927), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:00,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19927 transitions. [2021-06-05 15:15:00,640 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19927 transitions. Word has length 23 [2021-06-05 15:15:00,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:00,640 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19927 transitions. [2021-06-05 15:15:00,640 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:00,640 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19927 transitions. [2021-06-05 15:15:00,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:00,646 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:00,646 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:00,846 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1350,622 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:00,846 INFO L430 AbstractCegarLoop]: === Iteration 623 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:00,847 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:00,847 INFO L82 PathProgramCache]: Analyzing trace with hash 956176039, now seen corresponding path program 41 times [2021-06-05 15:15:00,847 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:00,847 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [622899138] [2021-06-05 15:15:00,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:00,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:00,977 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:00,977 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [622899138] [2021-06-05 15:15:00,977 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [622899138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:00,977 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863602662] [2021-06-05 15:15:00,977 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 623 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:01,000 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:01,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:01,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:01,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:01,064 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:01,064 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:01,065 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:01,074 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:01,074 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:01,074 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:01,173 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863602662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:01,173 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:01,173 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:01,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536757620] [2021-06-05 15:15:01,174 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:01,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:01,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:01,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:01,174 INFO L87 Difference]: Start difference. First operand 4674 states and 19927 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:01,973 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:01,973 INFO L93 Difference]: Finished difference Result 5117 states and 21593 transitions. [2021-06-05 15:15:01,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:15:01,973 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:01,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:01,982 INFO L225 Difference]: With dead ends: 5117 [2021-06-05 15:15:01,982 INFO L226 Difference]: Without dead ends: 5092 [2021-06-05 15:15:01,982 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 657.7ms TimeCoverageRelationStatistics Valid=178, Invalid=814, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:15:01,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5092 states. [2021-06-05 15:15:02,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5092 to 4678. [2021-06-05 15:15:02,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.2640581569382086) internal successors, (19943), 4677 states have internal predecessors, (19943), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:02,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19943 transitions. [2021-06-05 15:15:02,047 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19943 transitions. Word has length 23 [2021-06-05 15:15:02,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:02,047 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19943 transitions. [2021-06-05 15:15:02,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:02,048 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19943 transitions. [2021-06-05 15:15:02,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:02,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:02,054 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:02,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 623 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1352 [2021-06-05 15:15:02,254 INFO L430 AbstractCegarLoop]: === Iteration 624 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:02,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:02,254 INFO L82 PathProgramCache]: Analyzing trace with hash -56516493, now seen corresponding path program 42 times [2021-06-05 15:15:02,254 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:02,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949640721] [2021-06-05 15:15:02,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:02,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:02,386 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:02,386 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:02,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949640721] [2021-06-05 15:15:02,386 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [949640721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:02,386 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977595472] [2021-06-05 15:15:02,386 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 624 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:02,409 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:02,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:02,410 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:02,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:02,478 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:02,498 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:15:02,498 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 25 treesize of output 53 [2021-06-05 15:15:02,499 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:02,512 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:02,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:02,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:31, output treesize:43 [2021-06-05 15:15:02,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:02,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [977595472] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:02,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:02,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:02,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935841619] [2021-06-05 15:15:02,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:02,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:02,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:02,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:02,599 INFO L87 Difference]: Start difference. First operand 4678 states and 19943 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,262 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:03,263 INFO L93 Difference]: Finished difference Result 5012 states and 21181 transitions. [2021-06-05 15:15:03,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:15:03,263 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:03,263 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:03,272 INFO L225 Difference]: With dead ends: 5012 [2021-06-05 15:15:03,272 INFO L226 Difference]: Without dead ends: 4991 [2021-06-05 15:15:03,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 530.9ms TimeCoverageRelationStatistics Valid=156, Invalid=836, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:15:03,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4991 states. [2021-06-05 15:15:03,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4991 to 4670. [2021-06-05 15:15:03,327 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.264296423216963) internal successors, (19910), 4669 states have internal predecessors, (19910), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 19910 transitions. [2021-06-05 15:15:03,338 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 19910 transitions. Word has length 23 [2021-06-05 15:15:03,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:03,338 INFO L482 AbstractCegarLoop]: Abstraction has 4670 states and 19910 transitions. [2021-06-05 15:15:03,338 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:03,338 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 19910 transitions. [2021-06-05 15:15:03,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:03,345 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:03,345 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:03,545 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 624 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1354 [2021-06-05 15:15:03,545 INFO L430 AbstractCegarLoop]: === Iteration 625 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:03,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:03,545 INFO L82 PathProgramCache]: Analyzing trace with hash -466034245, now seen corresponding path program 43 times [2021-06-05 15:15:03,545 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:03,545 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097423469] [2021-06-05 15:15:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:03,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:03,662 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:03,662 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:03,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097423469] [2021-06-05 15:15:03,662 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1097423469] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:03,662 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702387739] [2021-06-05 15:15:03,662 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 625 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:03,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:03,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:03,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:03,776 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:03,776 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:03,777 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:03,785 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:03,786 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:03,786 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:03,848 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:03,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702387739] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:03,848 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:03,848 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:03,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1208030121] [2021-06-05 15:15:03,848 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:03,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:03,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:03,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:03,848 INFO L87 Difference]: Start difference. First operand 4670 states and 19910 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:04,721 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:04,722 INFO L93 Difference]: Finished difference Result 5365 states and 22589 transitions. [2021-06-05 15:15:04,722 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:15:04,722 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:04,722 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:04,732 INFO L225 Difference]: With dead ends: 5365 [2021-06-05 15:15:04,732 INFO L226 Difference]: Without dead ends: 5334 [2021-06-05 15:15:04,732 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 637.5ms TimeCoverageRelationStatistics Valid=184, Invalid=938, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:15:04,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5334 states. [2021-06-05 15:15:04,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5334 to 4674. [2021-06-05 15:15:04,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4674 states, 4673 states have (on average 4.263428204579499) internal successors, (19923), 4673 states have internal predecessors, (19923), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:04,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4674 states to 4674 states and 19923 transitions. [2021-06-05 15:15:04,797 INFO L78 Accepts]: Start accepts. Automaton has 4674 states and 19923 transitions. Word has length 23 [2021-06-05 15:15:04,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:04,797 INFO L482 AbstractCegarLoop]: Abstraction has 4674 states and 19923 transitions. [2021-06-05 15:15:04,798 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:04,798 INFO L276 IsEmpty]: Start isEmpty. Operand 4674 states and 19923 transitions. [2021-06-05 15:15:04,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:04,804 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:04,804 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:05,004 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 625 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1358 [2021-06-05 15:15:05,004 INFO L430 AbstractCegarLoop]: === Iteration 626 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:05,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:05,004 INFO L82 PathProgramCache]: Analyzing trace with hash 121711077, now seen corresponding path program 44 times [2021-06-05 15:15:05,005 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:05,005 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206678186] [2021-06-05 15:15:05,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:05,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:05,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:05,132 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206678186] [2021-06-05 15:15:05,132 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [206678186] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:05,132 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11126476] [2021-06-05 15:15:05,132 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 626 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:05,155 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:05,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:05,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:05,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:05,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:05,231 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:05,232 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:05,239 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:05,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:05,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:15:05,360 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:05,360 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11126476] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:05,360 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:05,360 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:05,360 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2144903348] [2021-06-05 15:15:05,360 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:05,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:05,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:05,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:05,361 INFO L87 Difference]: Start difference. First operand 4674 states and 19923 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:06,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:06,272 INFO L93 Difference]: Finished difference Result 5223 states and 22014 transitions. [2021-06-05 15:15:06,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:15:06,273 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:06,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:06,282 INFO L225 Difference]: With dead ends: 5223 [2021-06-05 15:15:06,282 INFO L226 Difference]: Without dead ends: 5198 [2021-06-05 15:15:06,282 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 862.0ms TimeCoverageRelationStatistics Valid=237, Invalid=953, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:15:06,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5198 states. [2021-06-05 15:15:06,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5198 to 4678. [2021-06-05 15:15:06,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4678 states, 4677 states have (on average 4.26320290784691) internal successors, (19939), 4677 states have internal predecessors, (19939), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:06,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4678 states to 4678 states and 19939 transitions. [2021-06-05 15:15:06,345 INFO L78 Accepts]: Start accepts. Automaton has 4678 states and 19939 transitions. Word has length 23 [2021-06-05 15:15:06,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:06,346 INFO L482 AbstractCegarLoop]: Abstraction has 4678 states and 19939 transitions. [2021-06-05 15:15:06,346 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:06,346 INFO L276 IsEmpty]: Start isEmpty. Operand 4678 states and 19939 transitions. [2021-06-05 15:15:06,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:06,352 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:06,352 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:06,552 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1360,626 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:06,552 INFO L430 AbstractCegarLoop]: === Iteration 627 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:06,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:06,552 INFO L82 PathProgramCache]: Analyzing trace with hash 1197422233, now seen corresponding path program 45 times [2021-06-05 15:15:06,553 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:06,553 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [599852277] [2021-06-05 15:15:06,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:06,554 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:06,684 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:06,684 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:06,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [599852277] [2021-06-05 15:15:06,685 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [599852277] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:06,685 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [165794407] [2021-06-05 15:15:06,685 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 627 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:06,709 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:06,709 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:06,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:06,710 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:06,784 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:06,784 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:06,785 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:06,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:06,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:06,793 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:15:06,873 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:06,873 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [165794407] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:06,873 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:06,873 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:06,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240411592] [2021-06-05 15:15:06,873 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:06,873 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:06,873 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:06,873 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=279, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:06,873 INFO L87 Difference]: Start difference. First operand 4678 states and 19939 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:07,966 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:07,966 INFO L93 Difference]: Finished difference Result 5167 states and 21801 transitions. [2021-06-05 15:15:07,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2021-06-05 15:15:07,967 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:07,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:07,975 INFO L225 Difference]: With dead ends: 5167 [2021-06-05 15:15:07,976 INFO L226 Difference]: Without dead ends: 5146 [2021-06-05 15:15:07,976 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 215 ImplicationChecksByTransitivity, 951.7ms TimeCoverageRelationStatistics Valid=230, Invalid=892, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:15:07,980 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5146 states. [2021-06-05 15:15:08,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5146 to 4670. [2021-06-05 15:15:08,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.263225530092097) internal successors, (19905), 4669 states have internal predecessors, (19905), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:08,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 19905 transitions. [2021-06-05 15:15:08,037 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 19905 transitions. Word has length 23 [2021-06-05 15:15:08,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:08,038 INFO L482 AbstractCegarLoop]: Abstraction has 4670 states and 19905 transitions. [2021-06-05 15:15:08,038 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:08,038 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 19905 transitions. [2021-06-05 15:15:08,044 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:08,044 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:08,044 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:08,244 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1362,627 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:08,244 INFO L430 AbstractCegarLoop]: === Iteration 628 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:08,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:08,245 INFO L82 PathProgramCache]: Analyzing trace with hash 933709631, now seen corresponding path program 46 times [2021-06-05 15:15:08,245 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:08,245 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763485657] [2021-06-05 15:15:08,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:08,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:08,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:08,356 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:08,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763485657] [2021-06-05 15:15:08,356 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763485657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:08,356 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1622403024] [2021-06-05 15:15:08,356 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 628 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:08,380 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:08,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:08,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:08,381 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:08,460 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:08,460 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:08,461 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:08,469 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:08,470 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:08,470 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:08,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:08,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1622403024] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:08,553 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:08,553 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:08,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045100831] [2021-06-05 15:15:08,553 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:08,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:08,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:08,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:08,554 INFO L87 Difference]: Start difference. First operand 4670 states and 19905 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:09,013 INFO L93 Difference]: Finished difference Result 4938 states and 20912 transitions. [2021-06-05 15:15:09,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:09,013 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:09,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:09,022 INFO L225 Difference]: With dead ends: 4938 [2021-06-05 15:15:09,022 INFO L226 Difference]: Without dead ends: 4912 [2021-06-05 15:15:09,023 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 423.7ms TimeCoverageRelationStatistics Valid=128, Invalid=574, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:09,027 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4912 states. [2021-06-05 15:15:09,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4912 to 4677. [2021-06-05 15:15:09,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4677 states, 4676 states have (on average 4.2619760479041915) internal successors, (19929), 4676 states have internal predecessors, (19929), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4677 states to 4677 states and 19929 transitions. [2021-06-05 15:15:09,087 INFO L78 Accepts]: Start accepts. Automaton has 4677 states and 19929 transitions. Word has length 23 [2021-06-05 15:15:09,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:09,087 INFO L482 AbstractCegarLoop]: Abstraction has 4677 states and 19929 transitions. [2021-06-05 15:15:09,087 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:09,087 INFO L276 IsEmpty]: Start isEmpty. Operand 4677 states and 19929 transitions. [2021-06-05 15:15:09,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:09,093 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:09,093 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:09,293 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 628 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1364 [2021-06-05 15:15:09,293 INFO L430 AbstractCegarLoop]: === Iteration 629 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:09,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:09,294 INFO L82 PathProgramCache]: Analyzing trace with hash -107866437, now seen corresponding path program 47 times [2021-06-05 15:15:09,294 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:09,294 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408344593] [2021-06-05 15:15:09,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:09,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:09,419 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:09,419 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:09,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408344593] [2021-06-05 15:15:09,419 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [408344593] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:09,419 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147841149] [2021-06-05 15:15:09,419 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 629 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:09,443 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:09,443 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:09,444 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:09,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:09,522 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:09,522 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:09,524 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:09,533 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:09,533 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:09,534 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:09,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:09,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147841149] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:09,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:09,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:09,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100898702] [2021-06-05 15:15:09,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:09,629 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:09,629 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:09,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:09,629 INFO L87 Difference]: Start difference. First operand 4677 states and 19929 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:10,191 INFO L93 Difference]: Finished difference Result 4984 states and 21086 transitions. [2021-06-05 15:15:10,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:10,191 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:10,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:10,200 INFO L225 Difference]: With dead ends: 4984 [2021-06-05 15:15:10,200 INFO L226 Difference]: Without dead ends: 4956 [2021-06-05 15:15:10,201 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 500.9ms TimeCoverageRelationStatistics Valid=134, Invalid=622, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:15:10,205 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4956 states. [2021-06-05 15:15:10,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4956 to 4670. [2021-06-05 15:15:10,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4670 states, 4669 states have (on average 4.262582994217177) internal successors, (19902), 4669 states have internal predecessors, (19902), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4670 states to 4670 states and 19902 transitions. [2021-06-05 15:15:10,265 INFO L78 Accepts]: Start accepts. Automaton has 4670 states and 19902 transitions. Word has length 23 [2021-06-05 15:15:10,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:10,265 INFO L482 AbstractCegarLoop]: Abstraction has 4670 states and 19902 transitions. [2021-06-05 15:15:10,265 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:10,265 INFO L276 IsEmpty]: Start isEmpty. Operand 4670 states and 19902 transitions. [2021-06-05 15:15:10,299 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:10,299 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:10,299 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:10,499 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1366,629 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:10,499 INFO L430 AbstractCegarLoop]: === Iteration 630 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:10,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:10,500 INFO L82 PathProgramCache]: Analyzing trace with hash -993664717, now seen corresponding path program 48 times [2021-06-05 15:15:10,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:10,500 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310199456] [2021-06-05 15:15:10,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:10,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:10,641 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:10,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:10,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310199456] [2021-06-05 15:15:10,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310199456] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705108746] [2021-06-05 15:15:10,642 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 630 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:10,673 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:10,673 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:10,674 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:10,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:10,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:10,769 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:10,770 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:10,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:10,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:10,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:10,851 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:10,852 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705108746] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:10,852 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:10,852 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:10,852 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467914218] [2021-06-05 15:15:10,852 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:10,852 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:10,852 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:10,852 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:10,852 INFO L87 Difference]: Start difference. First operand 4670 states and 19902 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,446 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:11,446 INFO L93 Difference]: Finished difference Result 5115 states and 21598 transitions. [2021-06-05 15:15:11,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:15:11,446 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:11,455 INFO L225 Difference]: With dead ends: 5115 [2021-06-05 15:15:11,455 INFO L226 Difference]: Without dead ends: 5081 [2021-06-05 15:15:11,455 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 508.1ms TimeCoverageRelationStatistics Valid=143, Invalid=787, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:15:11,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5081 states. [2021-06-05 15:15:11,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5081 to 4663. [2021-06-05 15:15:11,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.262977262977263) internal successors, (19874), 4662 states have internal predecessors, (19874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19874 transitions. [2021-06-05 15:15:11,517 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19874 transitions. Word has length 23 [2021-06-05 15:15:11,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:11,517 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19874 transitions. [2021-06-05 15:15:11,518 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:11,518 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19874 transitions. [2021-06-05 15:15:11,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:11,524 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:11,524 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:11,724 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1368,630 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:11,724 INFO L430 AbstractCegarLoop]: === Iteration 631 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:11,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:11,724 INFO L82 PathProgramCache]: Analyzing trace with hash -1178718999, now seen corresponding path program 49 times [2021-06-05 15:15:11,724 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:11,724 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356667579] [2021-06-05 15:15:11,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:11,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:11,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:11,848 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356667579] [2021-06-05 15:15:11,848 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356667579] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:11,848 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245063209] [2021-06-05 15:15:11,848 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 631 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:11,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:11,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:11,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:11,935 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:11,935 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:11,936 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:11,945 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:11,945 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:11,945 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:12,047 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:12,047 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245063209] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:12,047 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:12,047 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:12,047 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301774444] [2021-06-05 15:15:12,047 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:12,047 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:12,047 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:12,048 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:12,048 INFO L87 Difference]: Start difference. First operand 4663 states and 19874 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:12,598 INFO L93 Difference]: Finished difference Result 4944 states and 20909 transitions. [2021-06-05 15:15:12,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:12,598 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:12,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:12,606 INFO L225 Difference]: With dead ends: 4944 [2021-06-05 15:15:12,607 INFO L226 Difference]: Without dead ends: 4918 [2021-06-05 15:15:12,607 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 505.0ms TimeCoverageRelationStatistics Valid=142, Invalid=560, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:12,611 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4918 states. [2021-06-05 15:15:12,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4918 to 4672. [2021-06-05 15:15:12,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.2616142153714405) internal successors, (19906), 4671 states have internal predecessors, (19906), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19906 transitions. [2021-06-05 15:15:12,669 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19906 transitions. Word has length 23 [2021-06-05 15:15:12,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:12,669 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19906 transitions. [2021-06-05 15:15:12,669 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:12,669 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19906 transitions. [2021-06-05 15:15:12,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:12,675 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:12,675 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:12,875 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 631 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1370 [2021-06-05 15:15:12,875 INFO L430 AbstractCegarLoop]: === Iteration 632 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:12,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash 2074672229, now seen corresponding path program 50 times [2021-06-05 15:15:12,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:12,876 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1085774544] [2021-06-05 15:15:12,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:12,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:13,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:13,027 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:13,027 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1085774544] [2021-06-05 15:15:13,028 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1085774544] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,028 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1748513481] [2021-06-05 15:15:13,028 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 632 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:13,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:13,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:13,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:13,114 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:13,114 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:13,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:13,124 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:13,124 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:13,124 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:13,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:13,224 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1748513481] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:13,224 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:13,224 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:13,224 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887729573] [2021-06-05 15:15:13,224 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:13,224 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:13,224 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:13,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:13,225 INFO L87 Difference]: Start difference. First operand 4672 states and 19906 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:13,882 INFO L93 Difference]: Finished difference Result 4990 states and 21083 transitions. [2021-06-05 15:15:13,882 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:15:13,882 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:13,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:13,891 INFO L225 Difference]: With dead ends: 4990 [2021-06-05 15:15:13,891 INFO L226 Difference]: Without dead ends: 4962 [2021-06-05 15:15:13,891 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 659.3ms TimeCoverageRelationStatistics Valid=173, Invalid=697, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:15:13,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4962 states. [2021-06-05 15:15:13,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4962 to 4665. [2021-06-05 15:15:13,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.262864493996569) internal successors, (19882), 4664 states have internal predecessors, (19882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 19882 transitions. [2021-06-05 15:15:13,954 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 19882 transitions. Word has length 23 [2021-06-05 15:15:13,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:13,954 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 19882 transitions. [2021-06-05 15:15:13,954 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:13,954 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 19882 transitions. [2021-06-05 15:15:13,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:13,960 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:13,960 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:14,161 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1372,632 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:14,161 INFO L430 AbstractCegarLoop]: === Iteration 633 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:14,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:14,161 INFO L82 PathProgramCache]: Analyzing trace with hash 1787550877, now seen corresponding path program 51 times [2021-06-05 15:15:14,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:14,161 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663391596] [2021-06-05 15:15:14,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:14,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:14,285 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:14,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663391596] [2021-06-05 15:15:14,285 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663391596] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,285 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [999672055] [2021-06-05 15:15:14,285 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 633 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:14,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:14,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:14,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:14,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:14,374 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:14,374 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:14,375 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:14,384 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:14,384 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:14,384 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:14,483 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:14,483 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [999672055] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:14,483 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:14,483 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:14,483 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1142789381] [2021-06-05 15:15:14,484 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:14,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:14,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:14,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:14,484 INFO L87 Difference]: Start difference. First operand 4665 states and 19882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:14,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:14,947 INFO L93 Difference]: Finished difference Result 4940 states and 20894 transitions. [2021-06-05 15:15:14,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-06-05 15:15:14,948 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:14,956 INFO L225 Difference]: With dead ends: 4940 [2021-06-05 15:15:14,956 INFO L226 Difference]: Without dead ends: 4914 [2021-06-05 15:15:14,956 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 464.7ms TimeCoverageRelationStatistics Valid=140, Invalid=562, Unknown=0, NotChecked=0, Total=702 [2021-06-05 15:15:14,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4914 states. [2021-06-05 15:15:15,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4914 to 4669. [2021-06-05 15:15:15,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.262639245929734) internal successors, (19898), 4668 states have internal predecessors, (19898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19898 transitions. [2021-06-05 15:15:15,018 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19898 transitions. Word has length 23 [2021-06-05 15:15:15,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:15,019 INFO L482 AbstractCegarLoop]: Abstraction has 4669 states and 19898 transitions. [2021-06-05 15:15:15,019 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:15,019 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19898 transitions. [2021-06-05 15:15:15,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:15,025 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:15,025 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:15,225 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 633 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1374 [2021-06-05 15:15:15,225 INFO L430 AbstractCegarLoop]: === Iteration 634 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:15,225 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:15,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1294333491, now seen corresponding path program 52 times [2021-06-05 15:15:15,226 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:15,226 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [520922347] [2021-06-05 15:15:15,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:15,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:15,363 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:15,363 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:15,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [520922347] [2021-06-05 15:15:15,363 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [520922347] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:15,363 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116743571] [2021-06-05 15:15:15,363 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 634 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:15,389 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:15,389 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:15,390 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:15,390 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:15,515 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:15,516 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:15,517 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:15,526 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:15,526 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:15,526 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:15,628 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:15,628 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116743571] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:15,628 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:15,628 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:15,628 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795046087] [2021-06-05 15:15:15,628 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:15,628 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:15,628 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:15,629 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:15,629 INFO L87 Difference]: Start difference. First operand 4669 states and 19898 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:16,454 INFO L93 Difference]: Finished difference Result 4944 states and 20916 transitions. [2021-06-05 15:15:16,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:16,455 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:16,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:16,464 INFO L225 Difference]: With dead ends: 4944 [2021-06-05 15:15:16,464 INFO L226 Difference]: Without dead ends: 4923 [2021-06-05 15:15:16,464 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 758.2ms TimeCoverageRelationStatistics Valid=157, Invalid=655, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:16,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4923 states. [2021-06-05 15:15:16,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4923 to 4665. [2021-06-05 15:15:16,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.262864493996569) internal successors, (19882), 4664 states have internal predecessors, (19882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 19882 transitions. [2021-06-05 15:15:16,532 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 19882 transitions. Word has length 23 [2021-06-05 15:15:16,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:16,532 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 19882 transitions. [2021-06-05 15:15:16,532 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:16,532 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 19882 transitions. [2021-06-05 15:15:16,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:16,538 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:16,539 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:16,739 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 634 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1376 [2021-06-05 15:15:16,739 INFO L430 AbstractCegarLoop]: === Iteration 635 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:16,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:16,739 INFO L82 PathProgramCache]: Analyzing trace with hash -2065857549, now seen corresponding path program 53 times [2021-06-05 15:15:16,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:16,739 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934228359] [2021-06-05 15:15:16,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:16,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:16,872 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:16,872 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:16,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934228359] [2021-06-05 15:15:16,872 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934228359] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:16,872 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787411452] [2021-06-05 15:15:16,872 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 635 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:16,896 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:16,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:16,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:16,897 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:16,960 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:16,960 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:16,961 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:16,969 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:16,970 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:16,970 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:17,070 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:17,070 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1787411452] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:17,070 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:17,070 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:17,070 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [802361514] [2021-06-05 15:15:17,070 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:17,070 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:17,071 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:17,071 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:17,071 INFO L87 Difference]: Start difference. First operand 4665 states and 19882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:17,785 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:17,785 INFO L93 Difference]: Finished difference Result 4985 states and 21067 transitions. [2021-06-05 15:15:17,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-06-05 15:15:17,785 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:17,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:17,794 INFO L225 Difference]: With dead ends: 4985 [2021-06-05 15:15:17,794 INFO L226 Difference]: Without dead ends: 4960 [2021-06-05 15:15:17,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 622.9ms TimeCoverageRelationStatistics Valid=172, Invalid=698, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:15:17,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4960 states. [2021-06-05 15:15:17,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4960 to 4669. [2021-06-05 15:15:17,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4669 states, 4668 states have (on average 4.262639245929734) internal successors, (19898), 4668 states have internal predecessors, (19898), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4669 states to 4669 states and 19898 transitions. [2021-06-05 15:15:17,891 INFO L78 Accepts]: Start accepts. Automaton has 4669 states and 19898 transitions. Word has length 23 [2021-06-05 15:15:17,891 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:17,891 INFO L482 AbstractCegarLoop]: Abstraction has 4669 states and 19898 transitions. [2021-06-05 15:15:17,891 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:17,891 INFO L276 IsEmpty]: Start isEmpty. Operand 4669 states and 19898 transitions. [2021-06-05 15:15:17,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:17,897 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:17,897 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:18,097 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1378,635 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:18,097 INFO L430 AbstractCegarLoop]: === Iteration 636 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:18,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:18,098 INFO L82 PathProgramCache]: Analyzing trace with hash 1216417215, now seen corresponding path program 54 times [2021-06-05 15:15:18,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:18,098 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684786807] [2021-06-05 15:15:18,098 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:18,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:18,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:18,235 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:18,235 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684786807] [2021-06-05 15:15:18,236 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1684786807] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:18,236 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705445150] [2021-06-05 15:15:18,236 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 636 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:18,262 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:18,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:18,262 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:18,263 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:18,328 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:18,328 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:18,329 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:18,338 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:18,339 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:18,339 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:18,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:18,443 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705445150] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:18,443 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:18,443 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:18,443 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993431602] [2021-06-05 15:15:18,443 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:18,443 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:18,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:18,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:18,443 INFO L87 Difference]: Start difference. First operand 4669 states and 19898 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:19,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:19,172 INFO L93 Difference]: Finished difference Result 4943 states and 20912 transitions. [2021-06-05 15:15:19,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:19,173 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:19,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:19,181 INFO L225 Difference]: With dead ends: 4943 [2021-06-05 15:15:19,182 INFO L226 Difference]: Without dead ends: 4922 [2021-06-05 15:15:19,182 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 130 ImplicationChecksByTransitivity, 668.3ms TimeCoverageRelationStatistics Valid=160, Invalid=652, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:19,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4922 states. [2021-06-05 15:15:19,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4922 to 4663. [2021-06-05 15:15:19,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.262977262977263) internal successors, (19874), 4662 states have internal predecessors, (19874), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:19,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19874 transitions. [2021-06-05 15:15:19,246 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19874 transitions. Word has length 23 [2021-06-05 15:15:19,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:19,246 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19874 transitions. [2021-06-05 15:15:19,246 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:19,246 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19874 transitions. [2021-06-05 15:15:19,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:19,252 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:19,252 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:19,453 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1380,636 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:19,453 INFO L430 AbstractCegarLoop]: === Iteration 637 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:19,453 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:19,453 INFO L82 PathProgramCache]: Analyzing trace with hash -501068955, now seen corresponding path program 55 times [2021-06-05 15:15:19,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:19,453 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1670463758] [2021-06-05 15:15:19,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:19,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:19,574 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:19,574 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:19,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1670463758] [2021-06-05 15:15:19,574 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1670463758] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,574 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365726239] [2021-06-05 15:15:19,575 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 637 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:19,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:19,599 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:19,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:19,691 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:19,691 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:19,692 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,700 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:19,700 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:19,700 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:19,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:19,763 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1365726239] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:19,763 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:19,763 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:19,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009532500] [2021-06-05 15:15:19,763 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:19,763 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:19,763 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:19,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:19,764 INFO L87 Difference]: Start difference. First operand 4663 states and 19874 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:20,481 INFO L93 Difference]: Finished difference Result 5163 states and 21779 transitions. [2021-06-05 15:15:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:15:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:20,491 INFO L225 Difference]: With dead ends: 5163 [2021-06-05 15:15:20,491 INFO L226 Difference]: Without dead ends: 5132 [2021-06-05 15:15:20,492 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 180 ImplicationChecksByTransitivity, 526.7ms TimeCoverageRelationStatistics Valid=150, Invalid=842, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:15:20,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5132 states. [2021-06-05 15:15:20,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5132 to 4663. [2021-06-05 15:15:20,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.261261261261262) internal successors, (19866), 4662 states have internal predecessors, (19866), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19866 transitions. [2021-06-05 15:15:20,583 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19866 transitions. Word has length 23 [2021-06-05 15:15:20,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:20,584 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19866 transitions. [2021-06-05 15:15:20,584 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:20,584 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19866 transitions. [2021-06-05 15:15:20,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:20,590 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:20,590 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:20,791 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1382,637 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:20,791 INFO L430 AbstractCegarLoop]: === Iteration 638 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:20,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:20,791 INFO L82 PathProgramCache]: Analyzing trace with hash 539166843, now seen corresponding path program 56 times [2021-06-05 15:15:20,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:20,791 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996845777] [2021-06-05 15:15:20,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:20,793 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:20,917 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:20,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996845777] [2021-06-05 15:15:20,917 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1996845777] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:20,917 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422122096] [2021-06-05 15:15:20,917 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 638 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:20,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:20,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:20,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:20,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:21,022 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:21,022 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:21,023 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:21,031 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:21,031 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:21,031 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:15:21,114 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:21,114 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422122096] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:21,114 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:21,114 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:21,114 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [29704018] [2021-06-05 15:15:21,114 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:21,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:21,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:21,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:21,114 INFO L87 Difference]: Start difference. First operand 4663 states and 19866 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:21,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:21,990 INFO L93 Difference]: Finished difference Result 5077 states and 21424 transitions. [2021-06-05 15:15:21,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2021-06-05 15:15:21,990 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:21,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:21,999 INFO L225 Difference]: With dead ends: 5077 [2021-06-05 15:15:21,999 INFO L226 Difference]: Without dead ends: 5052 [2021-06-05 15:15:22,000 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 720.0ms TimeCoverageRelationStatistics Valid=198, Invalid=858, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:15:22,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5052 states. [2021-06-05 15:15:22,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5052 to 4667. [2021-06-05 15:15:22,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4667 states, 4666 states have (on average 4.2610372910415775) internal successors, (19882), 4666 states have internal predecessors, (19882), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4667 states to 4667 states and 19882 transitions. [2021-06-05 15:15:22,074 INFO L78 Accepts]: Start accepts. Automaton has 4667 states and 19882 transitions. Word has length 23 [2021-06-05 15:15:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:22,074 INFO L482 AbstractCegarLoop]: Abstraction has 4667 states and 19882 transitions. [2021-06-05 15:15:22,074 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:22,074 INFO L276 IsEmpty]: Start isEmpty. Operand 4667 states and 19882 transitions. [2021-06-05 15:15:22,081 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:22,081 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:22,081 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:22,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1384,638 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:22,281 INFO L430 AbstractCegarLoop]: === Iteration 639 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:22,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:22,281 INFO L82 PathProgramCache]: Analyzing trace with hash -473525689, now seen corresponding path program 57 times [2021-06-05 15:15:22,281 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:22,281 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1630331657] [2021-06-05 15:15:22,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:22,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:22,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:22,404 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:22,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1630331657] [2021-06-05 15:15:22,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1630331657] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:22,404 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459406628] [2021-06-05 15:15:22,404 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 639 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:22,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:22,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:22,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:22,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:22,507 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:22,508 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:22,509 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:22,516 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:22,517 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:22,517 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:15:22,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:22,598 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [459406628] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:22,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:22,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:22,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [643837228] [2021-06-05 15:15:22,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:22,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:22,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:22,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:22,599 INFO L87 Difference]: Start difference. First operand 4667 states and 19882 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:23,178 WARN L205 SmtUtils]: Spent 103.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 40 [2021-06-05 15:15:23,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:23,526 INFO L93 Difference]: Finished difference Result 5027 states and 21235 transitions. [2021-06-05 15:15:23,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:15:23,526 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:23,526 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:23,535 INFO L225 Difference]: With dead ends: 5027 [2021-06-05 15:15:23,535 INFO L226 Difference]: Without dead ends: 5006 [2021-06-05 15:15:23,535 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 809.6ms TimeCoverageRelationStatistics Valid=176, Invalid=754, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:15:23,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5006 states. [2021-06-05 15:15:23,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5006 to 4657. [2021-06-05 15:15:23,587 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:23,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 15:15:23,597 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 15:15:23,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:23,597 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 15:15:23,597 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:23,597 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 15:15:23,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:23,604 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:23,604 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:23,804 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1386,639 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:23,804 INFO L430 AbstractCegarLoop]: === Iteration 640 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:23,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:23,804 INFO L82 PathProgramCache]: Analyzing trace with hash 1215002995, now seen corresponding path program 58 times [2021-06-05 15:15:23,805 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:23,805 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960744319] [2021-06-05 15:15:23,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:23,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:23,883 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:23,883 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:23,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960744319] [2021-06-05 15:15:23,883 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1960744319] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:23,883 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [120544887] [2021-06-05 15:15:23,883 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 640 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:23,907 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:23,908 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:23,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:23,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:24,017 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:24,018 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:24,019 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:24,026 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:24,027 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:24,027 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:24,090 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:24,091 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [120544887] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:24,091 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:24,091 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:24,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720158490] [2021-06-05 15:15:24,091 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:24,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:24,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:24,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:24,091 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:24,729 INFO L93 Difference]: Finished difference Result 5345 states and 22489 transitions. [2021-06-05 15:15:24,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:24,729 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:24,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:24,740 INFO L225 Difference]: With dead ends: 5345 [2021-06-05 15:15:24,740 INFO L226 Difference]: Without dead ends: 5336 [2021-06-05 15:15:24,740 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 464.4ms TimeCoverageRelationStatistics Valid=139, Invalid=983, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:15:24,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5336 states. [2021-06-05 15:15:24,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5336 to 4668. [2021-06-05 15:15:24,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 4.261409899292907) internal successors, (19888), 4667 states have internal predecessors, (19888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 19888 transitions. [2021-06-05 15:15:24,808 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 19888 transitions. Word has length 23 [2021-06-05 15:15:24,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:24,808 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 19888 transitions. [2021-06-05 15:15:24,808 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:24,808 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 19888 transitions. [2021-06-05 15:15:24,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:24,816 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:24,816 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:25,016 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 640 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1388 [2021-06-05 15:15:25,016 INFO L430 AbstractCegarLoop]: === Iteration 641 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:25,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:25,017 INFO L82 PathProgramCache]: Analyzing trace with hash -1334680265, now seen corresponding path program 59 times [2021-06-05 15:15:25,017 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:25,017 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170902316] [2021-06-05 15:15:25,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:25,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:25,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:25,099 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:25,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170902316] [2021-06-05 15:15:25,099 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [170902316] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:25,099 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520979153] [2021-06-05 15:15:25,100 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 641 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:25,124 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:25,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:25,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:25,125 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:25,230 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:25,230 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:25,231 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:25,240 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:25,240 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:25,240 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:25,333 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:25,333 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1520979153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:25,333 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:25,334 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:25,334 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780056557] [2021-06-05 15:15:25,334 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:25,334 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:25,334 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:25,334 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:25,334 INFO L87 Difference]: Start difference. First operand 4668 states and 19888 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:26,141 INFO L93 Difference]: Finished difference Result 5157 states and 21755 transitions. [2021-06-05 15:15:26,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:15:26,142 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:26,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:26,151 INFO L225 Difference]: With dead ends: 5157 [2021-06-05 15:15:26,151 INFO L226 Difference]: Without dead ends: 5148 [2021-06-05 15:15:26,151 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 626.8ms TimeCoverageRelationStatistics Valid=148, Invalid=1042, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:15:26,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5148 states. [2021-06-05 15:15:26,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5148 to 4672. [2021-06-05 15:15:26,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4672 states, 4671 states have (on average 4.26182830229073) internal successors, (19907), 4671 states have internal predecessors, (19907), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4672 states to 4672 states and 19907 transitions. [2021-06-05 15:15:26,215 INFO L78 Accepts]: Start accepts. Automaton has 4672 states and 19907 transitions. Word has length 23 [2021-06-05 15:15:26,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:26,215 INFO L482 AbstractCegarLoop]: Abstraction has 4672 states and 19907 transitions. [2021-06-05 15:15:26,215 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:26,215 INFO L276 IsEmpty]: Start isEmpty. Operand 4672 states and 19907 transitions. [2021-06-05 15:15:26,221 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:26,221 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:26,221 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:26,422 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 641 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1390 [2021-06-05 15:15:26,422 INFO L430 AbstractCegarLoop]: === Iteration 642 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:26,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:26,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1918710963, now seen corresponding path program 60 times [2021-06-05 15:15:26,422 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:26,422 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848323992] [2021-06-05 15:15:26,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:26,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:26,501 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:26,501 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:26,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848323992] [2021-06-05 15:15:26,501 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [848323992] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,501 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412204668] [2021-06-05 15:15:26,501 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 642 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:26,525 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:26,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:26,526 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:26,526 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:26,626 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:26,627 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:15:26,628 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:26,637 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:26,637 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:26,637 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:39 [2021-06-05 15:15:26,728 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:26,728 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412204668] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:26,728 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:26,728 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:26,728 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [704593289] [2021-06-05 15:15:26,728 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:26,728 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:26,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:26,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:26,728 INFO L87 Difference]: Start difference. First operand 4672 states and 19907 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:27,429 INFO L93 Difference]: Finished difference Result 5174 states and 21822 transitions. [2021-06-05 15:15:27,430 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:15:27,430 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:27,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:27,439 INFO L225 Difference]: With dead ends: 5174 [2021-06-05 15:15:27,439 INFO L226 Difference]: Without dead ends: 5165 [2021-06-05 15:15:27,439 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 554.6ms TimeCoverageRelationStatistics Valid=145, Invalid=1045, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:15:27,444 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5165 states. [2021-06-05 15:15:27,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5165 to 4657. [2021-06-05 15:15:27,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 15:15:27,505 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 15:15:27,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:27,505 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 15:15:27,506 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:27,506 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 15:15:27,512 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:27,512 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:27,512 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:27,712 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1392,642 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:27,712 INFO L430 AbstractCegarLoop]: === Iteration 643 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:27,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:27,712 INFO L82 PathProgramCache]: Analyzing trace with hash 1692829853, now seen corresponding path program 61 times [2021-06-05 15:15:27,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:27,713 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123662670] [2021-06-05 15:15:27,713 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:27,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:27,816 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:27,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123662670] [2021-06-05 15:15:27,816 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123662670] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:27,816 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1317742721] [2021-06-05 15:15:27,816 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 643 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:27,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:27,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:27,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:27,922 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:27,922 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:27,924 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:27,932 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:27,933 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:27,933 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:28,019 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:28,019 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1317742721] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:28,019 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:28,019 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:28,019 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798877835] [2021-06-05 15:15:28,020 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:28,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:28,020 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:28,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:28,638 INFO L93 Difference]: Finished difference Result 4859 states and 20578 transitions. [2021-06-05 15:15:28,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:28,638 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:28,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:28,647 INFO L225 Difference]: With dead ends: 4859 [2021-06-05 15:15:28,647 INFO L226 Difference]: Without dead ends: 4850 [2021-06-05 15:15:28,647 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 498.6ms TimeCoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:28,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4850 states. [2021-06-05 15:15:28,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4850 to 4668. [2021-06-05 15:15:28,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4668 states, 4667 states have (on average 4.262052710520677) internal successors, (19891), 4667 states have internal predecessors, (19891), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:28,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4668 states to 4668 states and 19891 transitions. [2021-06-05 15:15:28,713 INFO L78 Accepts]: Start accepts. Automaton has 4668 states and 19891 transitions. Word has length 23 [2021-06-05 15:15:28,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:28,713 INFO L482 AbstractCegarLoop]: Abstraction has 4668 states and 19891 transitions. [2021-06-05 15:15:28,713 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:28,713 INFO L276 IsEmpty]: Start isEmpty. Operand 4668 states and 19891 transitions. [2021-06-05 15:15:28,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:28,719 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:28,719 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:28,919 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1394,643 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:28,920 INFO L430 AbstractCegarLoop]: === Iteration 644 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:28,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:28,920 INFO L82 PathProgramCache]: Analyzing trace with hash 651253785, now seen corresponding path program 62 times [2021-06-05 15:15:28,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:28,920 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1039881139] [2021-06-05 15:15:28,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:28,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:29,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:29,024 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:29,024 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1039881139] [2021-06-05 15:15:29,024 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1039881139] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,025 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293788420] [2021-06-05 15:15:29,025 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 644 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:29,048 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:29,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:29,049 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:29,049 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:29,130 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:29,131 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:29,132 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,140 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:29,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:29,141 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:29,228 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:29,228 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1293788420] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:29,228 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:29,228 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:29,228 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278830168] [2021-06-05 15:15:29,228 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:29,228 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:29,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:29,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:29,228 INFO L87 Difference]: Start difference. First operand 4668 states and 19891 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:29,870 INFO L93 Difference]: Finished difference Result 4888 states and 20691 transitions. [2021-06-05 15:15:29,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:29,870 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:29,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:29,880 INFO L225 Difference]: With dead ends: 4888 [2021-06-05 15:15:29,880 INFO L226 Difference]: Without dead ends: 4879 [2021-06-05 15:15:29,880 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 540.4ms TimeCoverageRelationStatistics Valid=144, Invalid=668, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:29,885 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4879 states. [2021-06-05 15:15:29,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4879 to 4664. [2021-06-05 15:15:29,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 4.261634141110873) internal successors, (19872), 4663 states have internal predecessors, (19872), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 19872 transitions. [2021-06-05 15:15:29,943 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 19872 transitions. Word has length 23 [2021-06-05 15:15:29,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:29,943 INFO L482 AbstractCegarLoop]: Abstraction has 4664 states and 19872 transitions. [2021-06-05 15:15:29,944 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:29,944 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 19872 transitions. [2021-06-05 15:15:29,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:29,950 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:29,950 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:30,150 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 644 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1396 [2021-06-05 15:15:30,150 INFO L430 AbstractCegarLoop]: === Iteration 645 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:30,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:30,150 INFO L82 PathProgramCache]: Analyzing trace with hash -234544495, now seen corresponding path program 63 times [2021-06-05 15:15:30,150 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:30,151 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [940840163] [2021-06-05 15:15:30,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:30,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:30,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:30,255 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [940840163] [2021-06-05 15:15:30,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [940840163] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:30,255 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6442712] [2021-06-05 15:15:30,255 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 645 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:30,279 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:30,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:30,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:30,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:30,378 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:30,378 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:30,379 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:30,387 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:30,387 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:30,387 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:30,452 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:30,452 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6442712] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:30,452 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:30,452 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:30,453 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [401157868] [2021-06-05 15:15:30,453 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:30,453 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:30,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:30,453 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=292, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:30,453 INFO L87 Difference]: Start difference. First operand 4664 states and 19872 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:31,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:31,043 INFO L93 Difference]: Finished difference Result 5023 states and 21209 transitions. [2021-06-05 15:15:31,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:15:31,043 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:31,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:31,052 INFO L225 Difference]: With dead ends: 5023 [2021-06-05 15:15:31,052 INFO L226 Difference]: Without dead ends: 5014 [2021-06-05 15:15:31,052 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 477.8ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:15:31,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5014 states. [2021-06-05 15:15:31,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5014 to 4657. [2021-06-05 15:15:31,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:31,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 15:15:31,115 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 15:15:31,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:31,115 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 15:15:31,115 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:31,115 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 15:15:31,122 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:31,122 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:31,122 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:31,322 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 645 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1398 [2021-06-05 15:15:31,322 INFO L430 AbstractCegarLoop]: === Iteration 646 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:31,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:31,322 INFO L82 PathProgramCache]: Analyzing trace with hash 154224905, now seen corresponding path program 64 times [2021-06-05 15:15:31,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:31,322 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275207926] [2021-06-05 15:15:31,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:31,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:31,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:31,403 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:31,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275207926] [2021-06-05 15:15:31,403 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275207926] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:31,403 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264273235] [2021-06-05 15:15:31,403 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 646 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:31,427 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:31,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:31,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:31,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:31,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:31,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:31,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:31,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:31,543 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:31,543 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:31,606 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:31,606 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [264273235] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:31,606 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:31,607 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:31,607 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875543069] [2021-06-05 15:15:31,607 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:31,607 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:31,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:31,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:31,607 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:32,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:32,263 INFO L93 Difference]: Finished difference Result 5203 states and 21933 transitions. [2021-06-05 15:15:32,263 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:15:32,264 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:32,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:32,273 INFO L225 Difference]: With dead ends: 5203 [2021-06-05 15:15:32,273 INFO L226 Difference]: Without dead ends: 5194 [2021-06-05 15:15:32,273 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 212 ImplicationChecksByTransitivity, 448.1ms TimeCoverageRelationStatistics Valid=136, Invalid=920, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:15:32,278 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5194 states. [2021-06-05 15:15:32,324 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5194 to 4653. [2021-06-05 15:15:32,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.258813413585554) internal successors, (19812), 4652 states have internal predecessors, (19812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:32,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19812 transitions. [2021-06-05 15:15:32,350 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19812 transitions. Word has length 23 [2021-06-05 15:15:32,350 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:32,350 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19812 transitions. [2021-06-05 15:15:32,350 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:32,350 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19812 transitions. [2021-06-05 15:15:32,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:32,357 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:32,357 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:32,558 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 646 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1400 [2021-06-05 15:15:32,558 INFO L430 AbstractCegarLoop]: === Iteration 647 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:32,558 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:32,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1899508941, now seen corresponding path program 65 times [2021-06-05 15:15:32,558 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:32,558 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168724821] [2021-06-05 15:15:32,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:32,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:32,640 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:32,640 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:32,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168724821] [2021-06-05 15:15:32,640 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168724821] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:32,640 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2077723756] [2021-06-05 15:15:32,640 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 647 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:32,664 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:32,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:32,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:32,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:32,760 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:32,760 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:32,761 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:32,770 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:32,770 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:32,771 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:32,859 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:32,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2077723756] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:32,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:32,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:32,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436617137] [2021-06-05 15:15:32,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:32,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:32,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:32,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:32,860 INFO L87 Difference]: Start difference. First operand 4653 states and 19812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:33,730 INFO L93 Difference]: Finished difference Result 5199 states and 21904 transitions. [2021-06-05 15:15:33,730 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:15:33,730 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:33,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:33,739 INFO L225 Difference]: With dead ends: 5199 [2021-06-05 15:15:33,739 INFO L226 Difference]: Without dead ends: 5190 [2021-06-05 15:15:33,739 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 662.2ms TimeCoverageRelationStatistics Valid=172, Invalid=1310, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:15:33,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5190 states. [2021-06-05 15:15:33,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5190 to 4665. [2021-06-05 15:15:33,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4665 states, 4664 states have (on average 4.2602915951972555) internal successors, (19870), 4664 states have internal predecessors, (19870), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4665 states to 4665 states and 19870 transitions. [2021-06-05 15:15:33,803 INFO L78 Accepts]: Start accepts. Automaton has 4665 states and 19870 transitions. Word has length 23 [2021-06-05 15:15:33,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:33,803 INFO L482 AbstractCegarLoop]: Abstraction has 4665 states and 19870 transitions. [2021-06-05 15:15:33,803 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:33,803 INFO L276 IsEmpty]: Start isEmpty. Operand 4665 states and 19870 transitions. [2021-06-05 15:15:33,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:33,810 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:33,810 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:34,010 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1402,647 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:34,010 INFO L430 AbstractCegarLoop]: === Iteration 648 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:34,010 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:34,010 INFO L82 PathProgramCache]: Analyzing trace with hash 857932873, now seen corresponding path program 66 times [2021-06-05 15:15:34,010 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:34,010 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988542738] [2021-06-05 15:15:34,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:34,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:34,093 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:34,093 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988542738] [2021-06-05 15:15:34,093 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1988542738] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:34,093 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893732118] [2021-06-05 15:15:34,093 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 648 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:34,118 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:34,118 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:34,119 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:34,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:34,215 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:34,215 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:34,216 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:34,225 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:34,225 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:34,225 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:34,312 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:34,312 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1893732118] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:34,312 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:34,312 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:34,312 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1159629607] [2021-06-05 15:15:34,312 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:34,312 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:34,312 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:34,312 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:34,312 INFO L87 Difference]: Start difference. First operand 4665 states and 19870 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:35,190 INFO L93 Difference]: Finished difference Result 5322 states and 22409 transitions. [2021-06-05 15:15:35,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2021-06-05 15:15:35,190 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:35,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:35,199 INFO L225 Difference]: With dead ends: 5322 [2021-06-05 15:15:35,199 INFO L226 Difference]: Without dead ends: 5313 [2021-06-05 15:15:35,199 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 636.6ms TimeCoverageRelationStatistics Valid=168, Invalid=1314, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:15:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5313 states. [2021-06-05 15:15:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5313 to 4653. [2021-06-05 15:15:35,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.258813413585554) internal successors, (19812), 4652 states have internal predecessors, (19812), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19812 transitions. [2021-06-05 15:15:35,263 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19812 transitions. Word has length 23 [2021-06-05 15:15:35,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:35,264 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19812 transitions. [2021-06-05 15:15:35,264 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:35,264 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19812 transitions. [2021-06-05 15:15:35,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:35,270 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:35,270 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:35,470 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 648 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1404 [2021-06-05 15:15:35,471 INFO L430 AbstractCegarLoop]: === Iteration 649 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:35,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:35,471 INFO L82 PathProgramCache]: Analyzing trace with hash 1914277845, now seen corresponding path program 67 times [2021-06-05 15:15:35,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:35,471 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005497749] [2021-06-05 15:15:35,471 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:35,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:35,552 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005497749] [2021-06-05 15:15:35,552 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2005497749] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:35,552 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860876683] [2021-06-05 15:15:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 649 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:35,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:35,576 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:35,576 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:35,686 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:35,686 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:35,687 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:35,695 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:35,695 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:35,695 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:15:35,760 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:35,760 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860876683] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:35,760 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:35,760 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:35,760 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208249319] [2021-06-05 15:15:35,760 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:35,760 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:35,760 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:35,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:35,760 INFO L87 Difference]: Start difference. First operand 4653 states and 19812 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:36,437 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:36,437 INFO L93 Difference]: Finished difference Result 5745 states and 24061 transitions. [2021-06-05 15:15:36,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2021-06-05 15:15:36,437 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:36,437 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:36,447 INFO L225 Difference]: With dead ends: 5745 [2021-06-05 15:15:36,447 INFO L226 Difference]: Without dead ends: 5727 [2021-06-05 15:15:36,448 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 230 ImplicationChecksByTransitivity, 478.0ms TimeCoverageRelationStatistics Valid=142, Invalid=980, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:15:36,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5727 states. [2021-06-05 15:15:36,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5727 to 4659. [2021-06-05 15:15:36,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.260197509660799) internal successors, (19844), 4658 states have internal predecessors, (19844), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:36,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19844 transitions. [2021-06-05 15:15:36,515 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19844 transitions. Word has length 23 [2021-06-05 15:15:36,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:36,515 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19844 transitions. [2021-06-05 15:15:36,515 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:36,515 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19844 transitions. [2021-06-05 15:15:36,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:36,521 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:36,521 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:36,722 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1406,649 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:36,722 INFO L430 AbstractCegarLoop]: === Iteration 650 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:36,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:36,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1109878621, now seen corresponding path program 68 times [2021-06-05 15:15:36,722 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:36,722 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1709912255] [2021-06-05 15:15:36,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:36,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:36,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:36,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:36,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1709912255] [2021-06-05 15:15:36,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1709912255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:36,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1773932196] [2021-06-05 15:15:36,815 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 650 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:36,839 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:36,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:36,840 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:36,840 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:36,934 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:36,934 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:36,935 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:36,943 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:36,943 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:36,943 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:15:37,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:37,029 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1773932196] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:37,029 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:37,029 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:37,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1235745498] [2021-06-05 15:15:37,029 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:37,029 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:37,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:37,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:37,030 INFO L87 Difference]: Start difference. First operand 4659 states and 19844 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:37,908 INFO L93 Difference]: Finished difference Result 5468 states and 22983 transitions. [2021-06-05 15:15:37,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:37,908 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:37,908 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:37,918 INFO L225 Difference]: With dead ends: 5468 [2021-06-05 15:15:37,919 INFO L226 Difference]: Without dead ends: 5450 [2021-06-05 15:15:37,919 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 219 ImplicationChecksByTransitivity, 610.6ms TimeCoverageRelationStatistics Valid=151, Invalid=1039, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:15:37,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5450 states. [2021-06-05 15:15:37,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5450 to 4661. [2021-06-05 15:15:37,975 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4661 states, 4660 states have (on average 4.259656652360515) internal successors, (19850), 4660 states have internal predecessors, (19850), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4661 states to 4661 states and 19850 transitions. [2021-06-05 15:15:37,986 INFO L78 Accepts]: Start accepts. Automaton has 4661 states and 19850 transitions. Word has length 23 [2021-06-05 15:15:37,986 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:37,986 INFO L482 AbstractCegarLoop]: Abstraction has 4661 states and 19850 transitions. [2021-06-05 15:15:37,986 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:37,986 INFO L276 IsEmpty]: Start isEmpty. Operand 4661 states and 19850 transitions. [2021-06-05 15:15:37,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:37,992 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:37,992 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:38,193 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1408,650 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:38,193 INFO L430 AbstractCegarLoop]: === Iteration 651 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:38,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:38,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1571521941, now seen corresponding path program 69 times [2021-06-05 15:15:38,193 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:38,193 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413004115] [2021-06-05 15:15:38,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:38,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:38,287 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:38,287 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:38,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413004115] [2021-06-05 15:15:38,287 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413004115] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:38,287 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1500208138] [2021-06-05 15:15:38,287 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 651 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:38,311 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:38,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:38,312 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:38,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:38,410 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:38,411 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:38,412 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:38,419 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:38,420 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:38,420 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:15:38,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:38,505 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1500208138] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:38,505 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:38,505 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:38,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2139498080] [2021-06-05 15:15:38,505 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:38,505 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:38,505 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:38,505 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:38,505 INFO L87 Difference]: Start difference. First operand 4661 states and 19850 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:39,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:39,247 INFO L93 Difference]: Finished difference Result 5397 states and 22710 transitions. [2021-06-05 15:15:39,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:15:39,247 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:39,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:39,256 INFO L225 Difference]: With dead ends: 5397 [2021-06-05 15:15:39,256 INFO L226 Difference]: Without dead ends: 5375 [2021-06-05 15:15:39,257 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 571.2ms TimeCoverageRelationStatistics Valid=133, Invalid=859, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:15:39,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5375 states. [2021-06-05 15:15:39,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5375 to 4657. [2021-06-05 15:15:39,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:39,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 15:15:39,323 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 15:15:39,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:39,323 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 15:15:39,323 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:39,323 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 15:15:39,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:39,329 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:39,329 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:39,530 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 651 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1410 [2021-06-05 15:15:39,530 INFO L430 AbstractCegarLoop]: === Iteration 652 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:39,530 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:39,530 INFO L82 PathProgramCache]: Analyzing trace with hash -1480376867, now seen corresponding path program 70 times [2021-06-05 15:15:39,530 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:39,530 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938590523] [2021-06-05 15:15:39,530 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:39,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:39,624 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:39,624 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938590523] [2021-06-05 15:15:39,624 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1938590523] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:39,624 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609234001] [2021-06-05 15:15:39,624 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 652 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:39,647 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:39,648 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:39,648 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:39,648 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:39,733 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:39,733 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:15:39,734 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:39,744 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:39,744 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:39,744 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:15:39,860 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:39,860 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1609234001] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:39,860 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:39,860 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:39,860 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151206290] [2021-06-05 15:15:39,860 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:39,860 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:39,860 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:39,860 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:39,860 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:40,820 INFO L93 Difference]: Finished difference Result 5103 states and 21551 transitions. [2021-06-05 15:15:40,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:15:40,821 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:40,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:40,830 INFO L225 Difference]: With dead ends: 5103 [2021-06-05 15:15:40,830 INFO L226 Difference]: Without dead ends: 5094 [2021-06-05 15:15:40,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 741.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1231, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:15:40,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5094 states. [2021-06-05 15:15:40,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5094 to 4663. [2021-06-05 15:15:40,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.261046761046761) internal successors, (19865), 4662 states have internal predecessors, (19865), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19865 transitions. [2021-06-05 15:15:40,893 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19865 transitions. Word has length 23 [2021-06-05 15:15:40,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:40,893 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19865 transitions. [2021-06-05 15:15:40,893 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:40,893 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19865 transitions. [2021-06-05 15:15:40,899 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:40,899 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:40,899 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:41,099 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 652 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1412 [2021-06-05 15:15:41,100 INFO L430 AbstractCegarLoop]: === Iteration 653 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:41,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:41,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1773014361, now seen corresponding path program 71 times [2021-06-05 15:15:41,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:41,100 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2129710786] [2021-06-05 15:15:41,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:41,101 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:41,192 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:41,192 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:41,192 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2129710786] [2021-06-05 15:15:41,193 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2129710786] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:41,193 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601239922] [2021-06-05 15:15:41,193 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 653 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:41,216 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:15:41,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:41,217 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:41,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:41,295 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:41,295 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:41,296 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:41,305 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:41,305 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:41,306 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:41,448 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:41,448 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1601239922] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:41,448 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:41,448 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:41,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737248387] [2021-06-05 15:15:41,448 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:41,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:41,448 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:41,448 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:41,448 INFO L87 Difference]: Start difference. First operand 4663 states and 19865 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,326 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:42,326 INFO L93 Difference]: Finished difference Result 5182 states and 21862 transitions. [2021-06-05 15:15:42,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:15:42,327 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:42,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:42,336 INFO L225 Difference]: With dead ends: 5182 [2021-06-05 15:15:42,336 INFO L226 Difference]: Without dead ends: 5173 [2021-06-05 15:15:42,336 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 691.9ms TimeCoverageRelationStatistics Valid=167, Invalid=1093, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:15:42,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5173 states. [2021-06-05 15:15:42,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5173 to 4659. [2021-06-05 15:15:42,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.260626878488622) internal successors, (19846), 4658 states have internal predecessors, (19846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19846 transitions. [2021-06-05 15:15:42,399 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19846 transitions. Word has length 23 [2021-06-05 15:15:42,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:42,399 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19846 transitions. [2021-06-05 15:15:42,399 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:42,399 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19846 transitions. [2021-06-05 15:15:42,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:42,405 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:42,405 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:42,606 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1414,653 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:42,606 INFO L430 AbstractCegarLoop]: === Iteration 654 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:42,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:42,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1485893009, now seen corresponding path program 72 times [2021-06-05 15:15:42,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:42,606 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1794792286] [2021-06-05 15:15:42,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:42,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:42,709 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:42,709 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:42,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1794792286] [2021-06-05 15:15:42,709 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1794792286] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:42,709 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [867876494] [2021-06-05 15:15:42,709 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 654 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:42,733 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:15:42,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:42,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:42,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:42,817 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:42,817 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:15:42,819 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:42,828 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:42,828 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:42,828 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 15:15:42,937 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:42,938 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [867876494] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:42,938 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:42,938 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:42,938 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2027720796] [2021-06-05 15:15:42,938 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:42,938 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:42,938 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:42,938 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:42,938 INFO L87 Difference]: Start difference. First operand 4659 states and 19846 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:43,769 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:43,770 INFO L93 Difference]: Finished difference Result 5079 states and 21456 transitions. [2021-06-05 15:15:43,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:15:43,770 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:43,770 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:43,779 INFO L225 Difference]: With dead ends: 5079 [2021-06-05 15:15:43,779 INFO L226 Difference]: Without dead ends: 5070 [2021-06-05 15:15:43,779 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 264 ImplicationChecksByTransitivity, 705.6ms TimeCoverageRelationStatistics Valid=169, Invalid=1163, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:15:43,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5070 states. [2021-06-05 15:15:43,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5070 to 4663. [2021-06-05 15:15:43,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.26040326040326) internal successors, (19862), 4662 states have internal predecessors, (19862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:43,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19862 transitions. [2021-06-05 15:15:43,874 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19862 transitions. Word has length 23 [2021-06-05 15:15:43,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:43,874 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19862 transitions. [2021-06-05 15:15:43,874 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:43,874 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19862 transitions. [2021-06-05 15:15:43,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:43,881 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:43,881 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:44,081 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1416,654 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:44,082 INFO L430 AbstractCegarLoop]: === Iteration 655 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:44,082 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:44,082 INFO L82 PathProgramCache]: Analyzing trace with hash 992675623, now seen corresponding path program 73 times [2021-06-05 15:15:44,082 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:44,082 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775312651] [2021-06-05 15:15:44,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:44,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:44,183 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:44,184 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:44,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775312651] [2021-06-05 15:15:44,184 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775312651] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:44,184 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962610092] [2021-06-05 15:15:44,184 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 655 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:44,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:44,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:44,208 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:44,291 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:44,291 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:15:44,293 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:44,301 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:44,302 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:44,302 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:37 [2021-06-05 15:15:44,411 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:44,411 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962610092] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:44,411 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:44,411 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:44,411 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335097755] [2021-06-05 15:15:44,411 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:44,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:44,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:44,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:44,411 INFO L87 Difference]: Start difference. First operand 4663 states and 19862 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:45,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:45,213 INFO L93 Difference]: Finished difference Result 5005 states and 21170 transitions. [2021-06-05 15:15:45,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:15:45,213 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:45,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:45,222 INFO L225 Difference]: With dead ends: 5005 [2021-06-05 15:15:45,222 INFO L226 Difference]: Without dead ends: 4994 [2021-06-05 15:15:45,222 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 660.4ms TimeCoverageRelationStatistics Valid=151, Invalid=971, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:15:45,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4994 states. [2021-06-05 15:15:45,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4994 to 4659. [2021-06-05 15:15:45,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.260626878488622) internal successors, (19846), 4658 states have internal predecessors, (19846), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:45,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19846 transitions. [2021-06-05 15:15:45,284 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19846 transitions. Word has length 23 [2021-06-05 15:15:45,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:45,284 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19846 transitions. [2021-06-05 15:15:45,284 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:45,284 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19846 transitions. [2021-06-05 15:15:45,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:45,290 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:45,290 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:45,491 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1418,655 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:45,491 INFO L430 AbstractCegarLoop]: === Iteration 656 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:45,491 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:45,491 INFO L82 PathProgramCache]: Analyzing trace with hash 1927451879, now seen corresponding path program 74 times [2021-06-05 15:15:45,491 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:45,491 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700509075] [2021-06-05 15:15:45,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:45,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:45,584 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:45,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700509075] [2021-06-05 15:15:45,584 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700509075] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:45,584 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [341028910] [2021-06-05 15:15:45,584 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 656 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:45,608 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:45,609 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:45,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:45,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:45,692 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:45,693 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:15:45,694 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:45,703 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:45,704 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:45,704 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 15:15:45,813 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:45,813 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [341028910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:45,813 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:45,813 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:45,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593898843] [2021-06-05 15:15:45,813 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:45,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:45,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:45,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:45,813 INFO L87 Difference]: Start difference. First operand 4659 states and 19846 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:46,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:46,758 INFO L93 Difference]: Finished difference Result 5193 states and 21910 transitions. [2021-06-05 15:15:46,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:15:46,758 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:46,758 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:46,767 INFO L225 Difference]: With dead ends: 5193 [2021-06-05 15:15:46,767 INFO L226 Difference]: Without dead ends: 5184 [2021-06-05 15:15:46,767 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 699.1ms TimeCoverageRelationStatistics Valid=175, Invalid=1157, Unknown=0, NotChecked=0, Total=1332 [2021-06-05 15:15:46,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5184 states. [2021-06-05 15:15:46,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5184 to 4663. [2021-06-05 15:15:46,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4663 states, 4662 states have (on average 4.26040326040326) internal successors, (19862), 4662 states have internal predecessors, (19862), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:46,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4663 states to 4663 states and 19862 transitions. [2021-06-05 15:15:46,832 INFO L78 Accepts]: Start accepts. Automaton has 4663 states and 19862 transitions. Word has length 23 [2021-06-05 15:15:46,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:46,832 INFO L482 AbstractCegarLoop]: Abstraction has 4663 states and 19862 transitions. [2021-06-05 15:15:46,832 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:46,832 INFO L276 IsEmpty]: Start isEmpty. Operand 4663 states and 19862 transitions. [2021-06-05 15:15:46,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:46,838 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:46,838 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:47,039 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 656 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1420 [2021-06-05 15:15:47,039 INFO L430 AbstractCegarLoop]: === Iteration 657 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:47,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:47,039 INFO L82 PathProgramCache]: Analyzing trace with hash 914759347, now seen corresponding path program 75 times [2021-06-05 15:15:47,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:47,039 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30428426] [2021-06-05 15:15:47,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:47,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:47,131 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:47,131 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:47,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30428426] [2021-06-05 15:15:47,131 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30428426] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:47,131 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037225499] [2021-06-05 15:15:47,131 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 657 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:47,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:15:47,156 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:47,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:47,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:47,239 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:47,239 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:47,240 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:47,249 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:47,249 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:47,249 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:47,355 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:47,355 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037225499] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:47,355 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:47,355 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:47,356 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865614604] [2021-06-05 15:15:47,356 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:47,356 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:47,356 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:47,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:47,356 INFO L87 Difference]: Start difference. First operand 4663 states and 19862 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:48,253 INFO L93 Difference]: Finished difference Result 5032 states and 21278 transitions. [2021-06-05 15:15:48,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:15:48,253 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:48,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:48,262 INFO L225 Difference]: With dead ends: 5032 [2021-06-05 15:15:48,262 INFO L226 Difference]: Without dead ends: 5021 [2021-06-05 15:15:48,263 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 699.9ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:15:48,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5021 states. [2021-06-05 15:15:48,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5021 to 4657. [2021-06-05 15:15:48,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.260738831615121) internal successors, (19838), 4656 states have internal predecessors, (19838), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19838 transitions. [2021-06-05 15:15:48,326 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19838 transitions. Word has length 23 [2021-06-05 15:15:48,326 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:48,326 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19838 transitions. [2021-06-05 15:15:48,326 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:48,326 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19838 transitions. [2021-06-05 15:15:48,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:48,333 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:48,333 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:48,533 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 657 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1422 [2021-06-05 15:15:48,533 INFO L430 AbstractCegarLoop]: === Iteration 658 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:48,533 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:48,533 INFO L82 PathProgramCache]: Analyzing trace with hash -4415091, now seen corresponding path program 76 times [2021-06-05 15:15:48,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:48,533 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465934910] [2021-06-05 15:15:48,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:48,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:48,639 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:48,639 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:48,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465934910] [2021-06-05 15:15:48,639 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465934910] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:48,639 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594089935] [2021-06-05 15:15:48,639 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 658 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:48,662 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:48,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:48,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:48,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:48,743 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:48,743 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:48,744 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:48,753 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:48,753 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:48,753 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:48,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:48,837 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594089935] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:48,837 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:48,837 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:48,837 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406781905] [2021-06-05 15:15:48,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:48,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:48,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:48,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:48,837 INFO L87 Difference]: Start difference. First operand 4657 states and 19838 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:49,380 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:49,381 INFO L93 Difference]: Finished difference Result 4850 states and 20558 transitions. [2021-06-05 15:15:49,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:49,381 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:49,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:49,389 INFO L225 Difference]: With dead ends: 4850 [2021-06-05 15:15:49,389 INFO L226 Difference]: Without dead ends: 4841 [2021-06-05 15:15:49,389 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 473.5ms TimeCoverageRelationStatistics Valid=139, Invalid=617, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:15:49,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4841 states. [2021-06-05 15:15:49,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4841 to 4664. [2021-06-05 15:15:49,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4664 states, 4663 states have (on average 4.260776324254771) internal successors, (19868), 4663 states have internal predecessors, (19868), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:49,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4664 states to 4664 states and 19868 transitions. [2021-06-05 15:15:49,450 INFO L78 Accepts]: Start accepts. Automaton has 4664 states and 19868 transitions. Word has length 23 [2021-06-05 15:15:49,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:49,451 INFO L482 AbstractCegarLoop]: Abstraction has 4664 states and 19868 transitions. [2021-06-05 15:15:49,451 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:49,451 INFO L276 IsEmpty]: Start isEmpty. Operand 4664 states and 19868 transitions. [2021-06-05 15:15:49,457 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:49,457 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:49,457 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:49,657 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 658 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1424 [2021-06-05 15:15:49,657 INFO L430 AbstractCegarLoop]: === Iteration 659 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:49,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:49,658 INFO L82 PathProgramCache]: Analyzing trace with hash -1045991159, now seen corresponding path program 77 times [2021-06-05 15:15:49,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:49,658 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425705769] [2021-06-05 15:15:49,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:49,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:49,765 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:49,765 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:49,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425705769] [2021-06-05 15:15:49,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425705769] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:49,765 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [828675262] [2021-06-05 15:15:49,766 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 659 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:49,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:49,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:49,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:49,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:49,875 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:49,875 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:15:49,876 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:49,885 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:49,885 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:49,885 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:15:49,969 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:49,969 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [828675262] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:49,969 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:49,969 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:49,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967466643] [2021-06-05 15:15:49,969 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:49,969 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:49,969 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:49,969 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:49,969 INFO L87 Difference]: Start difference. First operand 4664 states and 19868 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:50,580 INFO L93 Difference]: Finished difference Result 4877 states and 20663 transitions. [2021-06-05 15:15:50,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:50,580 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:50,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:50,589 INFO L225 Difference]: With dead ends: 4877 [2021-06-05 15:15:50,589 INFO L226 Difference]: Without dead ends: 4868 [2021-06-05 15:15:50,589 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 550.6ms TimeCoverageRelationStatistics Valid=147, Invalid=665, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:50,593 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4868 states. [2021-06-05 15:15:50,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4868 to 4660. [2021-06-05 15:15:50,641 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4660 states, 4659 states have (on average 4.260356299635115) internal successors, (19849), 4659 states have internal predecessors, (19849), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4660 states to 4660 states and 19849 transitions. [2021-06-05 15:15:50,651 INFO L78 Accepts]: Start accepts. Automaton has 4660 states and 19849 transitions. Word has length 23 [2021-06-05 15:15:50,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:50,651 INFO L482 AbstractCegarLoop]: Abstraction has 4660 states and 19849 transitions. [2021-06-05 15:15:50,651 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:50,651 INFO L276 IsEmpty]: Start isEmpty. Operand 4660 states and 19849 transitions. [2021-06-05 15:15:50,657 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:50,658 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:50,658 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:50,858 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 659 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1426 [2021-06-05 15:15:50,858 INFO L430 AbstractCegarLoop]: === Iteration 660 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:50,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:50,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1931789439, now seen corresponding path program 78 times [2021-06-05 15:15:50,858 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:50,858 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051082553] [2021-06-05 15:15:50,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:50,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:50,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:50,964 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051082553] [2021-06-05 15:15:50,964 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1051082553] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:50,964 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767797913] [2021-06-05 15:15:50,964 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 660 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:50,988 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:50,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:50,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:50,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:51,090 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:15:51,110 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:15:51,110 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 24 treesize of output 52 [2021-06-05 15:15:51,115 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:15:51,141 INFO L628 ElimStorePlain]: treesize reduction 66, result has 17.5 percent of original size [2021-06-05 15:15:51,141 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:51,142 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:27, output treesize:14 [2021-06-05 15:15:51,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:51,182 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767797913] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:51,182 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:51,182 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:51,182 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700778286] [2021-06-05 15:15:51,182 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:51,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:51,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:51,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:51,182 INFO L87 Difference]: Start difference. First operand 4660 states and 19849 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:51,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:51,742 INFO L93 Difference]: Finished difference Result 4972 states and 21036 transitions. [2021-06-05 15:15:51,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:15:51,743 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:51,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:51,751 INFO L225 Difference]: With dead ends: 4972 [2021-06-05 15:15:51,751 INFO L226 Difference]: Without dead ends: 4963 [2021-06-05 15:15:51,751 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 381.4ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:15:51,756 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4963 states. [2021-06-05 15:15:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4963 to 4653. [2021-06-05 15:15:51,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.259458297506449) internal successors, (19815), 4652 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:51,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19815 transitions. [2021-06-05 15:15:51,812 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19815 transitions. Word has length 23 [2021-06-05 15:15:51,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:51,812 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19815 transitions. [2021-06-05 15:15:51,812 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:51,812 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19815 transitions. [2021-06-05 15:15:51,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:51,818 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:51,818 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:52,018 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1428,660 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:52,018 INFO L430 AbstractCegarLoop]: === Iteration 661 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:52,019 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:52,019 INFO L82 PathProgramCache]: Analyzing trace with hash -2116843721, now seen corresponding path program 79 times [2021-06-05 15:15:52,019 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:52,019 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256029268] [2021-06-05 15:15:52,019 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:52,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:52,134 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:52,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256029268] [2021-06-05 15:15:52,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256029268] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:52,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096592519] [2021-06-05 15:15:52,135 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 661 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:52,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:52,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:52,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:52,224 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:52,224 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:52,225 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:52,234 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:52,234 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:52,234 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:52,335 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:52,335 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096592519] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:52,335 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:52,335 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:52,335 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1637715826] [2021-06-05 15:15:52,335 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:52,335 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:52,335 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:52,335 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:52,335 INFO L87 Difference]: Start difference. First operand 4653 states and 19815 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:52,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:52,936 INFO L93 Difference]: Finished difference Result 4861 states and 20578 transitions. [2021-06-05 15:15:52,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:52,936 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:52,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:52,945 INFO L225 Difference]: With dead ends: 4861 [2021-06-05 15:15:52,946 INFO L226 Difference]: Without dead ends: 4852 [2021-06-05 15:15:52,946 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 567.7ms TimeCoverageRelationStatistics Valid=151, Invalid=605, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:15:52,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4852 states. [2021-06-05 15:15:52,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4852 to 4659. [2021-06-05 15:15:52,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.259768140832976) internal successors, (19842), 4658 states have internal predecessors, (19842), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:53,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19842 transitions. [2021-06-05 15:15:53,007 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19842 transitions. Word has length 23 [2021-06-05 15:15:53,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:53,007 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19842 transitions. [2021-06-05 15:15:53,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:53,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19842 transitions. [2021-06-05 15:15:53,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:53,014 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:53,014 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:53,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1432,661 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:53,214 INFO L430 AbstractCegarLoop]: === Iteration 662 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:53,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:53,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1136547507, now seen corresponding path program 80 times [2021-06-05 15:15:53,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:53,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12328976] [2021-06-05 15:15:53,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:53,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:53,331 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:53,331 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:53,331 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12328976] [2021-06-05 15:15:53,332 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12328976] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:53,332 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1328002617] [2021-06-05 15:15:53,332 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 662 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:53,356 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:15:53,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:53,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:53,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:53,424 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:53,424 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:53,425 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:53,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:53,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:53,434 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:53,538 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:53,538 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1328002617] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:53,538 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:53,538 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:53,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679512077] [2021-06-05 15:15:53,539 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:53,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:53,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:53,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:53,539 INFO L87 Difference]: Start difference. First operand 4659 states and 19842 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:54,378 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:54,379 INFO L93 Difference]: Finished difference Result 4946 states and 20918 transitions. [2021-06-05 15:15:54,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:15:54,379 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:54,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:54,387 INFO L225 Difference]: With dead ends: 4946 [2021-06-05 15:15:54,387 INFO L226 Difference]: Without dead ends: 4937 [2021-06-05 15:15:54,388 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 790.0ms TimeCoverageRelationStatistics Valid=203, Invalid=789, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:15:54,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4937 states. [2021-06-05 15:15:54,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4937 to 4655. [2021-06-05 15:15:54,442 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.259346798452944) internal successors, (19823), 4654 states have internal predecessors, (19823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:54,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 19823 transitions. [2021-06-05 15:15:54,453 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 19823 transitions. Word has length 23 [2021-06-05 15:15:54,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:54,453 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 19823 transitions. [2021-06-05 15:15:54,453 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:54,453 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 19823 transitions. [2021-06-05 15:15:54,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:54,460 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:54,460 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:54,660 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 662 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1434 [2021-06-05 15:15:54,660 INFO L430 AbstractCegarLoop]: === Iteration 663 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:54,660 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:54,660 INFO L82 PathProgramCache]: Analyzing trace with hash 849426155, now seen corresponding path program 81 times [2021-06-05 15:15:54,660 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:54,660 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461491601] [2021-06-05 15:15:54,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:54,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:54,774 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:54,774 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:54,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461491601] [2021-06-05 15:15:54,774 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461491601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:54,774 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417834930] [2021-06-05 15:15:54,774 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 663 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:54,799 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:15:54,799 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:54,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:54,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:54,864 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:54,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:54,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:54,874 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:54,874 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:54,874 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:54,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:54,973 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417834930] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:54,973 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:54,973 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:54,973 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661185775] [2021-06-05 15:15:54,974 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:54,974 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:54,974 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:54,974 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:54,974 INFO L87 Difference]: Start difference. First operand 4655 states and 19823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:55,573 INFO L93 Difference]: Finished difference Result 4857 states and 20563 transitions. [2021-06-05 15:15:55,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:15:55,574 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:55,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:55,582 INFO L225 Difference]: With dead ends: 4857 [2021-06-05 15:15:55,582 INFO L226 Difference]: Without dead ends: 4848 [2021-06-05 15:15:55,583 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 538.6ms TimeCoverageRelationStatistics Valid=148, Invalid=608, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:15:55,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4848 states. [2021-06-05 15:15:55,631 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4848 to 4659. [2021-06-05 15:15:55,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.259124087591241) internal successors, (19839), 4658 states have internal predecessors, (19839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19839 transitions. [2021-06-05 15:15:55,645 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19839 transitions. Word has length 23 [2021-06-05 15:15:55,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:55,645 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19839 transitions. [2021-06-05 15:15:55,645 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:55,645 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19839 transitions. [2021-06-05 15:15:55,651 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:55,651 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:55,651 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:55,852 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1436,663 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:55,852 INFO L430 AbstractCegarLoop]: === Iteration 664 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:55,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:55,852 INFO L82 PathProgramCache]: Analyzing trace with hash 356208769, now seen corresponding path program 82 times [2021-06-05 15:15:55,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:55,852 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995582360] [2021-06-05 15:15:55,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:55,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:55,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:55,967 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995582360] [2021-06-05 15:15:55,967 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995582360] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:55,967 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [720117412] [2021-06-05 15:15:55,968 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 664 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:55,991 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:15:55,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:55,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:55,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:56,057 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:56,057 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:56,058 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:56,067 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:56,067 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:56,067 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:56,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:56,167 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [720117412] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:56,167 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:56,167 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:56,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836070827] [2021-06-05 15:15:56,167 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:56,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:56,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:56,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:56,168 INFO L87 Difference]: Start difference. First operand 4659 states and 19839 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:57,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:57,065 INFO L93 Difference]: Finished difference Result 4831 states and 20469 transitions. [2021-06-05 15:15:57,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:57,065 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:57,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:57,073 INFO L225 Difference]: With dead ends: 4831 [2021-06-05 15:15:57,074 INFO L226 Difference]: Without dead ends: 4820 [2021-06-05 15:15:57,074 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 750.4ms TimeCoverageRelationStatistics Valid=169, Invalid=701, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:15:57,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4820 states. [2021-06-05 15:15:57,121 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4820 to 4655. [2021-06-05 15:15:57,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4655 states, 4654 states have (on average 4.259346798452944) internal successors, (19823), 4654 states have internal predecessors, (19823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:57,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4655 states to 4655 states and 19823 transitions. [2021-06-05 15:15:57,135 INFO L78 Accepts]: Start accepts. Automaton has 4655 states and 19823 transitions. Word has length 23 [2021-06-05 15:15:57,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:57,135 INFO L482 AbstractCegarLoop]: Abstraction has 4655 states and 19823 transitions. [2021-06-05 15:15:57,135 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:57,135 INFO L276 IsEmpty]: Start isEmpty. Operand 4655 states and 19823 transitions. [2021-06-05 15:15:57,141 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:57,141 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:57,141 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:57,342 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 664 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1438 [2021-06-05 15:15:57,342 INFO L430 AbstractCegarLoop]: === Iteration 665 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:57,342 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:57,342 INFO L82 PathProgramCache]: Analyzing trace with hash 1290985025, now seen corresponding path program 83 times [2021-06-05 15:15:57,342 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:57,342 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564271823] [2021-06-05 15:15:57,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:57,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:57,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:57,468 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:57,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564271823] [2021-06-05 15:15:57,468 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [564271823] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:57,468 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107154678] [2021-06-05 15:15:57,468 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 665 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:57,492 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:15:57,492 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:57,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:15:57,493 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:57,558 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:57,558 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:15:57,559 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:57,568 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:57,568 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:57,568 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:15:57,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:57,667 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107154678] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:57,667 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:57,667 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:15:57,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125772696] [2021-06-05 15:15:57,668 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:15:57,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:57,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:15:57,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:15:57,668 INFO L87 Difference]: Start difference. First operand 4655 states and 19823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:58,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:58,411 INFO L93 Difference]: Finished difference Result 4941 states and 20899 transitions. [2021-06-05 15:15:58,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:15:58,412 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:58,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:58,420 INFO L225 Difference]: With dead ends: 4941 [2021-06-05 15:15:58,420 INFO L226 Difference]: Without dead ends: 4932 [2021-06-05 15:15:58,421 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 729.2ms TimeCoverageRelationStatistics Valid=216, Invalid=840, Unknown=0, NotChecked=0, Total=1056 [2021-06-05 15:15:58,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4932 states. [2021-06-05 15:15:58,468 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4932 to 4659. [2021-06-05 15:15:58,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4659 states, 4658 states have (on average 4.259124087591241) internal successors, (19839), 4658 states have internal predecessors, (19839), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:58,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4659 states to 4659 states and 19839 transitions. [2021-06-05 15:15:58,483 INFO L78 Accepts]: Start accepts. Automaton has 4659 states and 19839 transitions. Word has length 23 [2021-06-05 15:15:58,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:58,483 INFO L482 AbstractCegarLoop]: Abstraction has 4659 states and 19839 transitions. [2021-06-05 15:15:58,483 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:58,483 INFO L276 IsEmpty]: Start isEmpty. Operand 4659 states and 19839 transitions. [2021-06-05 15:15:58,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:58,489 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:58,489 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:58,689 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 665 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1440 [2021-06-05 15:15:58,689 INFO L430 AbstractCegarLoop]: === Iteration 666 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:58,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:58,690 INFO L82 PathProgramCache]: Analyzing trace with hash 278292493, now seen corresponding path program 84 times [2021-06-05 15:15:58,690 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:58,690 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70229241] [2021-06-05 15:15:58,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:58,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:15:58,814 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:58,815 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:15:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70229241] [2021-06-05 15:15:58,815 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70229241] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:58,815 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031990699] [2021-06-05 15:15:58,815 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 666 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:15:58,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:15:58,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:15:58,841 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:15:58,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:15:58,928 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:15:58,928 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 23 treesize of output 49 [2021-06-05 15:15:58,929 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:15:58,941 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:15:58,941 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:15:58,942 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:29, output treesize:41 [2021-06-05 15:15:59,045 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:15:59,045 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1031990699] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:15:59,045 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:15:59,045 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:15:59,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452976156] [2021-06-05 15:15:59,045 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:15:59,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:15:59,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:15:59,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=323, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:15:59,045 INFO L87 Difference]: Start difference. First operand 4659 states and 19839 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:15:59,603 INFO L93 Difference]: Finished difference Result 4860 states and 20577 transitions. [2021-06-05 15:15:59,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:15:59,603 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:15:59,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:15:59,611 INFO L225 Difference]: With dead ends: 4860 [2021-06-05 15:15:59,612 INFO L226 Difference]: Without dead ends: 4849 [2021-06-05 15:15:59,612 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 528.8ms TimeCoverageRelationStatistics Valid=138, Invalid=674, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:15:59,616 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2021-06-05 15:15:59,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 4653. [2021-06-05 15:15:59,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.259458297506449) internal successors, (19815), 4652 states have internal predecessors, (19815), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19815 transitions. [2021-06-05 15:15:59,673 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19815 transitions. Word has length 23 [2021-06-05 15:15:59,673 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:15:59,673 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19815 transitions. [2021-06-05 15:15:59,673 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:15:59,673 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19815 transitions. [2021-06-05 15:15:59,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:15:59,679 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:15:59,679 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:15:59,879 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 666 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1442 [2021-06-05 15:15:59,879 INFO L430 AbstractCegarLoop]: === Iteration 667 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:15:59,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:15:59,880 INFO L82 PathProgramCache]: Analyzing trace with hash -1439193677, now seen corresponding path program 85 times [2021-06-05 15:15:59,880 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:15:59,880 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [629505662] [2021-06-05 15:15:59,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:15:59,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:00,006 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:00,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [629505662] [2021-06-05 15:16:00,006 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [629505662] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:00,006 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [749279672] [2021-06-05 15:16:00,006 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 667 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:00,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:00,031 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:00,031 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:00,123 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:00,124 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:00,125 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:00,132 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:00,133 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:00,133 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:00,195 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:00,195 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [749279672] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:00,195 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:00,195 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:00,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1692195767] [2021-06-05 15:16:00,196 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:00,196 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:00,196 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:00,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:00,196 INFO L87 Difference]: Start difference. First operand 4653 states and 19815 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:00,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:00,820 INFO L93 Difference]: Finished difference Result 5078 states and 21431 transitions. [2021-06-05 15:16:00,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-06-05 15:16:00,821 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:00,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:00,829 INFO L225 Difference]: With dead ends: 5078 [2021-06-05 15:16:00,829 INFO L226 Difference]: Without dead ends: 5069 [2021-06-05 15:16:00,830 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 548.9ms TimeCoverageRelationStatistics Valid=150, Invalid=780, Unknown=0, NotChecked=0, Total=930 [2021-06-05 15:16:00,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5069 states. [2021-06-05 15:16:00,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5069 to 4653. [2021-06-05 15:16:00,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4653 states, 4652 states have (on average 4.257738607050731) internal successors, (19807), 4652 states have internal predecessors, (19807), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:00,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4653 states to 4653 states and 19807 transitions. [2021-06-05 15:16:00,890 INFO L78 Accepts]: Start accepts. Automaton has 4653 states and 19807 transitions. Word has length 23 [2021-06-05 15:16:00,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:00,890 INFO L482 AbstractCegarLoop]: Abstraction has 4653 states and 19807 transitions. [2021-06-05 15:16:00,890 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:00,890 INFO L276 IsEmpty]: Start isEmpty. Operand 4653 states and 19807 transitions. [2021-06-05 15:16:00,896 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:00,896 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:00,896 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:01,096 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1446,667 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:01,096 INFO L430 AbstractCegarLoop]: === Iteration 668 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:01,096 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:01,096 INFO L82 PathProgramCache]: Analyzing trace with hash -398957879, now seen corresponding path program 86 times [2021-06-05 15:16:01,097 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:01,097 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14237253] [2021-06-05 15:16:01,097 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:01,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:01,210 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:01,210 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:01,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14237253] [2021-06-05 15:16:01,210 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14237253] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:01,210 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141178324] [2021-06-05 15:16:01,210 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 668 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:01,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:01,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:01,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:01,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:01,314 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:01,314 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:01,315 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:01,323 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:01,323 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:01,323 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:01,404 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2141178324] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:01,404 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:01,404 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:01,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502020551] [2021-06-05 15:16:01,404 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:01,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:01,405 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:01,405 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:01,405 INFO L87 Difference]: Start difference. First operand 4653 states and 19807 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:02,250 INFO L93 Difference]: Finished difference Result 5043 states and 21289 transitions. [2021-06-05 15:16:02,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2021-06-05 15:16:02,250 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:02,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:02,259 INFO L225 Difference]: With dead ends: 5043 [2021-06-05 15:16:02,259 INFO L226 Difference]: Without dead ends: 5034 [2021-06-05 15:16:02,259 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 202 ImplicationChecksByTransitivity, 770.1ms TimeCoverageRelationStatistics Valid=212, Invalid=910, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:16:02,264 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5034 states. [2021-06-05 15:16:02,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5034 to 4657. [2021-06-05 15:16:02,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4657 states, 4656 states have (on average 4.257517182130584) internal successors, (19823), 4656 states have internal predecessors, (19823), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4657 states to 4657 states and 19823 transitions. [2021-06-05 15:16:02,322 INFO L78 Accepts]: Start accepts. Automaton has 4657 states and 19823 transitions. Word has length 23 [2021-06-05 15:16:02,322 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:02,322 INFO L482 AbstractCegarLoop]: Abstraction has 4657 states and 19823 transitions. [2021-06-05 15:16:02,322 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:02,322 INFO L276 IsEmpty]: Start isEmpty. Operand 4657 states and 19823 transitions. [2021-06-05 15:16:02,328 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:02,328 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:02,328 INFO L521 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:02,528 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1448,668 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:02,528 INFO L430 AbstractCegarLoop]: === Iteration 669 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:02,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:02,528 INFO L82 PathProgramCache]: Analyzing trace with hash -1411650411, now seen corresponding path program 87 times [2021-06-05 15:16:02,529 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:02,529 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [300549468] [2021-06-05 15:16:02,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:02,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:02,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:02,642 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:02,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [300549468] [2021-06-05 15:16:02,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [300549468] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:02,642 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1089500868] [2021-06-05 15:16:02,643 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 669 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:02,666 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-06-05 15:16:02,667 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:02,667 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:02,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:02,745 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:02,745 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:02,746 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:02,754 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:02,754 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:02,754 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:02,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:02,836 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1089500868] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:02,836 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:02,836 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:02,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298933359] [2021-06-05 15:16:02,837 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:02,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:02,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:02,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:02,837 INFO L87 Difference]: Start difference. First operand 4657 states and 19823 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:03,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:03,787 INFO L93 Difference]: Finished difference Result 4924 states and 20819 transitions. [2021-06-05 15:16:03,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:16:03,787 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:03,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:03,796 INFO L225 Difference]: With dead ends: 4924 [2021-06-05 15:16:03,796 INFO L226 Difference]: Without dead ends: 4913 [2021-06-05 15:16:03,796 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 156 ImplicationChecksByTransitivity, 840.1ms TimeCoverageRelationStatistics Valid=189, Invalid=803, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:03,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4913 states. [2021-06-05 15:16:03,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4913 to 4651. [2021-06-05 15:16:03,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4651 states, 4650 states have (on average 4.258279569892473) internal successors, (19801), 4650 states have internal predecessors, (19801), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:03,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4651 states to 4651 states and 19801 transitions. [2021-06-05 15:16:03,858 INFO L78 Accepts]: Start accepts. Automaton has 4651 states and 19801 transitions. Word has length 23 [2021-06-05 15:16:03,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:03,858 INFO L482 AbstractCegarLoop]: Abstraction has 4651 states and 19801 transitions. [2021-06-05 15:16:03,859 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:03,859 INFO L276 IsEmpty]: Start isEmpty. Operand 4651 states and 19801 transitions. [2021-06-05 15:16:03,865 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:03,865 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:03,865 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:04,065 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1450,669 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:04,065 INFO L430 AbstractCegarLoop]: === Iteration 670 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:04,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:04,066 INFO L82 PathProgramCache]: Analyzing trace with hash 2077782683, now seen corresponding path program 7 times [2021-06-05 15:16:04,066 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:04,066 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371865658] [2021-06-05 15:16:04,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:04,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:04,168 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:04,168 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371865658] [2021-06-05 15:16:04,168 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371865658] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:04,168 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1705936747] [2021-06-05 15:16:04,168 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 670 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:04,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:04,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:04,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:04,289 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:04,289 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:04,290 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:04,298 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:04,298 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:04,298 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:04,353 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:04,353 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1705936747] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:04,354 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:04,354 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:04,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630592636] [2021-06-05 15:16:04,354 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:04,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:04,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:04,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:04,354 INFO L87 Difference]: Start difference. First operand 4651 states and 19801 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,362 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:05,362 INFO L93 Difference]: Finished difference Result 5095 states and 21500 transitions. [2021-06-05 15:16:05,362 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2021-06-05 15:16:05,362 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:05,362 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:05,372 INFO L225 Difference]: With dead ends: 5095 [2021-06-05 15:16:05,372 INFO L226 Difference]: Without dead ends: 5086 [2021-06-05 15:16:05,372 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 835.7ms TimeCoverageRelationStatistics Valid=251, Invalid=1231, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:16:05,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5086 states. [2021-06-05 15:16:05,423 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5086 to 4691. [2021-06-05 15:16:05,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4691 states, 4690 states have (on average 4.260980810234542) internal successors, (19984), 4690 states have internal predecessors, (19984), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4691 states to 4691 states and 19984 transitions. [2021-06-05 15:16:05,438 INFO L78 Accepts]: Start accepts. Automaton has 4691 states and 19984 transitions. Word has length 23 [2021-06-05 15:16:05,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:05,438 INFO L482 AbstractCegarLoop]: Abstraction has 4691 states and 19984 transitions. [2021-06-05 15:16:05,439 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:05,439 INFO L276 IsEmpty]: Start isEmpty. Operand 4691 states and 19984 transitions. [2021-06-05 15:16:05,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:05,445 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:05,445 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:05,645 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 670 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1452 [2021-06-05 15:16:05,645 INFO L430 AbstractCegarLoop]: === Iteration 671 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:05,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:05,646 INFO L82 PathProgramCache]: Analyzing trace with hash -87840261, now seen corresponding path program 1 times [2021-06-05 15:16:05,646 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:05,646 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724666255] [2021-06-05 15:16:05,646 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:05,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:05,726 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:05,726 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:05,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724666255] [2021-06-05 15:16:05,726 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724666255] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:05,726 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [863926776] [2021-06-05 15:16:05,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 671 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:05,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:05,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:05,751 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:05,863 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:05,864 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:05,865 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:05,872 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:05,873 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:05,873 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:05,931 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:05,931 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [863926776] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:05,931 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:05,931 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:05,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1953509912] [2021-06-05 15:16:05,931 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:05,931 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:05,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:05,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:05,931 INFO L87 Difference]: Start difference. First operand 4691 states and 19984 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:06,623 INFO L93 Difference]: Finished difference Result 5337 states and 22472 transitions. [2021-06-05 15:16:06,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2021-06-05 15:16:06,624 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:06,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:06,633 INFO L225 Difference]: With dead ends: 5337 [2021-06-05 15:16:06,634 INFO L226 Difference]: Without dead ends: 5328 [2021-06-05 15:16:06,634 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 216 ImplicationChecksByTransitivity, 471.0ms TimeCoverageRelationStatistics Valid=140, Invalid=982, Unknown=0, NotChecked=0, Total=1122 [2021-06-05 15:16:06,639 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5328 states. [2021-06-05 15:16:06,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5328 to 4706. [2021-06-05 15:16:06,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4705 states have (on average 4.262274176408076) internal successors, (20054), 4705 states have internal predecessors, (20054), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 20054 transitions. [2021-06-05 15:16:06,702 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 20054 transitions. Word has length 23 [2021-06-05 15:16:06,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:06,702 INFO L482 AbstractCegarLoop]: Abstraction has 4706 states and 20054 transitions. [2021-06-05 15:16:06,702 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:06,702 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 20054 transitions. [2021-06-05 15:16:06,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:06,709 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:06,709 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:06,909 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1454,671 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:06,909 INFO L430 AbstractCegarLoop]: === Iteration 672 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:06,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:06,909 INFO L82 PathProgramCache]: Analyzing trace with hash 2010462555, now seen corresponding path program 7 times [2021-06-05 15:16:06,909 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:06,910 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [730696050] [2021-06-05 15:16:06,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:06,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:06,994 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:06,995 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:06,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [730696050] [2021-06-05 15:16:06,995 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [730696050] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:06,995 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474134100] [2021-06-05 15:16:06,995 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 672 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:07,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:07,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:07,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:07,134 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:07,134 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:07,136 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:07,173 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:07,174 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:07,174 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:07,234 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:07,235 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474134100] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:07,235 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:07,235 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:07,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713461429] [2021-06-05 15:16:07,235 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:07,235 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:07,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:07,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:07,235 INFO L87 Difference]: Start difference. First operand 4706 states and 20054 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:07,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:07,991 INFO L93 Difference]: Finished difference Result 5406 states and 22731 transitions. [2021-06-05 15:16:07,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2021-06-05 15:16:07,991 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:07,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:08,001 INFO L225 Difference]: With dead ends: 5406 [2021-06-05 15:16:08,001 INFO L226 Difference]: Without dead ends: 5397 [2021-06-05 15:16:08,001 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 610.2ms TimeCoverageRelationStatistics Valid=180, Invalid=1226, Unknown=0, NotChecked=0, Total=1406 [2021-06-05 15:16:08,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5397 states. [2021-06-05 15:16:08,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5397 to 4707. [2021-06-05 15:16:08,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4707 states, 4706 states have (on average 4.260093497662559) internal successors, (20048), 4706 states have internal predecessors, (20048), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:08,070 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4707 states to 4707 states and 20048 transitions. [2021-06-05 15:16:08,070 INFO L78 Accepts]: Start accepts. Automaton has 4707 states and 20048 transitions. Word has length 23 [2021-06-05 15:16:08,070 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:08,070 INFO L482 AbstractCegarLoop]: Abstraction has 4707 states and 20048 transitions. [2021-06-05 15:16:08,071 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:08,071 INFO L276 IsEmpty]: Start isEmpty. Operand 4707 states and 20048 transitions. [2021-06-05 15:16:08,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:08,077 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:08,077 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:08,281 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 672 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1456 [2021-06-05 15:16:08,282 INFO L430 AbstractCegarLoop]: === Iteration 673 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:08,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:08,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1188735713, now seen corresponding path program 2 times [2021-06-05 15:16:08,282 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:08,282 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [341651733] [2021-06-05 15:16:08,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:08,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:08,368 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:08,368 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:08,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [341651733] [2021-06-05 15:16:08,368 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [341651733] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:08,368 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1105341664] [2021-06-05 15:16:08,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 673 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:08,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:08,393 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:08,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:08,394 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:08,501 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:08,501 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:16:08,502 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:08,511 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:08,512 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:08,512 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:39 [2021-06-05 15:16:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:08,601 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1105341664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:08,601 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:08,601 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:08,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [574189058] [2021-06-05 15:16:08,601 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:08,602 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:08,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:08,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:08,602 INFO L87 Difference]: Start difference. First operand 4707 states and 20048 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:09,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:09,338 INFO L93 Difference]: Finished difference Result 5168 states and 21814 transitions. [2021-06-05 15:16:09,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:16:09,338 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:09,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:09,347 INFO L225 Difference]: With dead ends: 5168 [2021-06-05 15:16:09,348 INFO L226 Difference]: Without dead ends: 5159 [2021-06-05 15:16:09,348 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 603.9ms TimeCoverageRelationStatistics Valid=149, Invalid=1041, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:16:09,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5159 states. [2021-06-05 15:16:09,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5159 to 4711. [2021-06-05 15:16:09,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4711 states, 4710 states have (on average 4.260509554140127) internal successors, (20067), 4710 states have internal predecessors, (20067), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:09,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4711 states to 4711 states and 20067 transitions. [2021-06-05 15:16:09,416 INFO L78 Accepts]: Start accepts. Automaton has 4711 states and 20067 transitions. Word has length 23 [2021-06-05 15:16:09,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:09,416 INFO L482 AbstractCegarLoop]: Abstraction has 4711 states and 20067 transitions. [2021-06-05 15:16:09,416 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:09,416 INFO L276 IsEmpty]: Start isEmpty. Operand 4711 states and 20067 transitions. [2021-06-05 15:16:09,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:09,423 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:09,423 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:09,623 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1458,673 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:09,623 INFO L430 AbstractCegarLoop]: === Iteration 674 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:09,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:09,624 INFO L82 PathProgramCache]: Analyzing trace with hash 1071827673, now seen corresponding path program 3 times [2021-06-05 15:16:09,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:09,624 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864905315] [2021-06-05 15:16:09,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:09,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:09,706 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:09,706 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864905315] [2021-06-05 15:16:09,706 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864905315] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:09,706 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891379543] [2021-06-05 15:16:09,706 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 674 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:09,731 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:09,731 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:09,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:09,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:09,867 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:09,867 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 25 treesize of output 41 [2021-06-05 15:16:09,868 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:09,877 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:09,878 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:09,878 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:39 [2021-06-05 15:16:09,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:09,968 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [891379543] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:09,968 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:09,968 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:09,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1730828518] [2021-06-05 15:16:09,968 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:09,968 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:09,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:09,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=328, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:09,968 INFO L87 Difference]: Start difference. First operand 4711 states and 20067 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:10,785 INFO L93 Difference]: Finished difference Result 5183 states and 21873 transitions. [2021-06-05 15:16:10,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:16:10,785 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:10,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:10,794 INFO L225 Difference]: With dead ends: 5183 [2021-06-05 15:16:10,794 INFO L226 Difference]: Without dead ends: 5174 [2021-06-05 15:16:10,795 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 594.7ms TimeCoverageRelationStatistics Valid=146, Invalid=1044, Unknown=0, NotChecked=0, Total=1190 [2021-06-05 15:16:10,799 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5174 states. [2021-06-05 15:16:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5174 to 4696. [2021-06-05 15:16:10,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4696 states, 4695 states have (on average 4.259424920127795) internal successors, (19998), 4695 states have internal predecessors, (19998), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4696 states to 4696 states and 19998 transitions. [2021-06-05 15:16:10,863 INFO L78 Accepts]: Start accepts. Automaton has 4696 states and 19998 transitions. Word has length 23 [2021-06-05 15:16:10,863 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:10,863 INFO L482 AbstractCegarLoop]: Abstraction has 4696 states and 19998 transitions. [2021-06-05 15:16:10,863 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:10,863 INFO L276 IsEmpty]: Start isEmpty. Operand 4696 states and 19998 transitions. [2021-06-05 15:16:10,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:10,869 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:10,869 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:11,070 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1460,674 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:11,070 INFO L430 AbstractCegarLoop]: === Iteration 675 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -650880135, now seen corresponding path program 4 times [2021-06-05 15:16:11,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:11,070 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708500373] [2021-06-05 15:16:11,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:11,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:11,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:11,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:11,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708500373] [2021-06-05 15:16:11,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [708500373] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:11,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [444902086] [2021-06-05 15:16:11,176 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 675 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:11,200 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:11,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:11,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:11,201 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:11,287 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:11,287 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:11,288 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:11,297 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:11,297 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:11,297 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:16:11,380 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:11,380 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [444902086] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:11,380 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:11,380 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:11,380 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [615009905] [2021-06-05 15:16:11,380 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:11,380 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:11,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:11,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:11,380 INFO L87 Difference]: Start difference. First operand 4696 states and 19998 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:11,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:11,947 INFO L93 Difference]: Finished difference Result 4858 states and 20580 transitions. [2021-06-05 15:16:11,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:16:11,947 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:11,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:11,956 INFO L225 Difference]: With dead ends: 4858 [2021-06-05 15:16:11,957 INFO L226 Difference]: Without dead ends: 4849 [2021-06-05 15:16:11,957 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 509.9ms TimeCoverageRelationStatistics Valid=142, Invalid=670, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:11,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4849 states. [2021-06-05 15:16:12,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4849 to 4703. [2021-06-05 15:16:12,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4703 states, 4702 states have (on average 4.259464057847724) internal successors, (20028), 4702 states have internal predecessors, (20028), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:12,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4703 states to 4703 states and 20028 transitions. [2021-06-05 15:16:12,023 INFO L78 Accepts]: Start accepts. Automaton has 4703 states and 20028 transitions. Word has length 23 [2021-06-05 15:16:12,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:12,023 INFO L482 AbstractCegarLoop]: Abstraction has 4703 states and 20028 transitions. [2021-06-05 15:16:12,024 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:12,024 INFO L276 IsEmpty]: Start isEmpty. Operand 4703 states and 20028 transitions. [2021-06-05 15:16:12,030 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:12,030 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:12,030 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:12,231 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 675 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1462 [2021-06-05 15:16:12,231 INFO L430 AbstractCegarLoop]: === Iteration 676 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:12,231 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:12,231 INFO L82 PathProgramCache]: Analyzing trace with hash 1609683251, now seen corresponding path program 5 times [2021-06-05 15:16:12,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:12,231 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1143973173] [2021-06-05 15:16:12,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:12,233 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:12,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:12,336 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:12,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1143973173] [2021-06-05 15:16:12,336 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1143973173] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:12,336 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235945174] [2021-06-05 15:16:12,336 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 676 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:12,360 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:16:12,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:12,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:12,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:12,476 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:12,476 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:12,477 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:12,486 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:12,486 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:12,486 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:16:12,567 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:12,567 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1235945174] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:12,567 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:12,567 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:12,567 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328830386] [2021-06-05 15:16:12,567 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:12,567 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:12,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:12,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=291, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:12,567 INFO L87 Difference]: Start difference. First operand 4703 states and 20028 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:13,165 INFO L93 Difference]: Finished difference Result 4887 states and 20693 transitions. [2021-06-05 15:16:13,165 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:16:13,165 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:13,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:13,174 INFO L225 Difference]: With dead ends: 4887 [2021-06-05 15:16:13,174 INFO L226 Difference]: Without dead ends: 4878 [2021-06-05 15:16:13,174 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 113 ImplicationChecksByTransitivity, 569.7ms TimeCoverageRelationStatistics Valid=145, Invalid=667, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:13,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4878 states. [2021-06-05 15:16:13,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4878 to 4699. [2021-06-05 15:16:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4699 states, 4698 states have (on average 4.259046402724564) internal successors, (20009), 4698 states have internal predecessors, (20009), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4699 states to 4699 states and 20009 transitions. [2021-06-05 15:16:13,238 INFO L78 Accepts]: Start accepts. Automaton has 4699 states and 20009 transitions. Word has length 23 [2021-06-05 15:16:13,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:13,238 INFO L482 AbstractCegarLoop]: Abstraction has 4699 states and 20009 transitions. [2021-06-05 15:16:13,238 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:13,238 INFO L276 IsEmpty]: Start isEmpty. Operand 4699 states and 20009 transitions. [2021-06-05 15:16:13,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:13,244 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:13,244 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:13,444 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 676 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1464 [2021-06-05 15:16:13,445 INFO L430 AbstractCegarLoop]: === Iteration 677 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:13,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:13,445 INFO L82 PathProgramCache]: Analyzing trace with hash 293525947, now seen corresponding path program 6 times [2021-06-05 15:16:13,445 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:13,445 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1337490093] [2021-06-05 15:16:13,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:13,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:13,553 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:13,553 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:13,553 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1337490093] [2021-06-05 15:16:13,553 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1337490093] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:13,554 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306648664] [2021-06-05 15:16:13,554 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 677 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:13,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:16:13,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:13,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 33 conjunts are in the unsatisfiable core [2021-06-05 15:16:13,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:13,703 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:16:13,703 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:16:13,707 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:13,727 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:16:13,728 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:13,728 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:16:13,765 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:13,765 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306648664] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:13,765 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:13,765 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:13,765 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1737983234] [2021-06-05 15:16:13,765 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:13,765 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:13,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:13,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:13,766 INFO L87 Difference]: Start difference. First operand 4699 states and 20009 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:14,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:14,311 INFO L93 Difference]: Finished difference Result 5160 states and 21776 transitions. [2021-06-05 15:16:14,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-06-05 15:16:14,311 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:14,311 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:14,320 INFO L225 Difference]: With dead ends: 5160 [2021-06-05 15:16:14,320 INFO L226 Difference]: Without dead ends: 5151 [2021-06-05 15:16:14,320 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 382.2ms TimeCoverageRelationStatistics Valid=113, Invalid=757, Unknown=0, NotChecked=0, Total=870 [2021-06-05 15:16:14,325 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5151 states. [2021-06-05 15:16:14,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5151 to 4675. [2021-06-05 15:16:14,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4675 states, 4674 states have (on average 4.255027813436029) internal successors, (19888), 4674 states have internal predecessors, (19888), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:14,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4675 states to 4675 states and 19888 transitions. [2021-06-05 15:16:14,384 INFO L78 Accepts]: Start accepts. Automaton has 4675 states and 19888 transitions. Word has length 23 [2021-06-05 15:16:14,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:14,384 INFO L482 AbstractCegarLoop]: Abstraction has 4675 states and 19888 transitions. [2021-06-05 15:16:14,384 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:14,384 INFO L276 IsEmpty]: Start isEmpty. Operand 4675 states and 19888 transitions. [2021-06-05 15:16:14,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:14,390 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:14,390 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:14,591 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 677 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1466 [2021-06-05 15:16:14,591 INFO L430 AbstractCegarLoop]: === Iteration 678 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:14,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:14,591 INFO L82 PathProgramCache]: Analyzing trace with hash 1156440123, now seen corresponding path program 8 times [2021-06-05 15:16:14,591 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:14,591 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722504292] [2021-06-05 15:16:14,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:14,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:14,693 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:14,693 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:14,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722504292] [2021-06-05 15:16:14,693 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722504292] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:14,693 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59741691] [2021-06-05 15:16:14,693 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 678 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:14,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:14,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:14,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:14,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:14,841 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:16:14,842 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:16:14,846 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:14,865 INFO L628 ElimStorePlain]: treesize reduction 70, result has 16.7 percent of original size [2021-06-05 15:16:14,865 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:14,865 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:16:14,926 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:14,926 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59741691] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:14,926 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:14,926 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:14,926 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206625724] [2021-06-05 15:16:14,926 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:14,926 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:14,927 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:14,927 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:14,927 INFO L87 Difference]: Start difference. First operand 4675 states and 19888 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:16,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:16,117 INFO L93 Difference]: Finished difference Result 5567 states and 23317 transitions. [2021-06-05 15:16:16,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:16:16,117 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:16,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:16,128 INFO L225 Difference]: With dead ends: 5567 [2021-06-05 15:16:16,128 INFO L226 Difference]: Without dead ends: 5524 [2021-06-05 15:16:16,128 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 483 ImplicationChecksByTransitivity, 1009.0ms TimeCoverageRelationStatistics Valid=291, Invalid=1779, Unknown=0, NotChecked=0, Total=2070 [2021-06-05 15:16:16,133 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5524 states. [2021-06-05 15:16:16,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5524 to 4706. [2021-06-05 15:16:16,189 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4706 states, 4705 states have (on average 4.25759829968119) internal successors, (20032), 4705 states have internal predecessors, (20032), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:16,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4706 states to 4706 states and 20032 transitions. [2021-06-05 15:16:16,200 INFO L78 Accepts]: Start accepts. Automaton has 4706 states and 20032 transitions. Word has length 23 [2021-06-05 15:16:16,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:16,200 INFO L482 AbstractCegarLoop]: Abstraction has 4706 states and 20032 transitions. [2021-06-05 15:16:16,200 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:16,200 INFO L276 IsEmpty]: Start isEmpty. Operand 4706 states and 20032 transitions. [2021-06-05 15:16:16,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:16,206 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:16,206 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:16,406 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 678 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1470 [2021-06-05 15:16:16,407 INFO L430 AbstractCegarLoop]: === Iteration 679 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:16,407 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:16,407 INFO L82 PathProgramCache]: Analyzing trace with hash 470844377, now seen corresponding path program 9 times [2021-06-05 15:16:16,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:16,407 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441038610] [2021-06-05 15:16:16,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:16,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:16,506 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:16,507 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:16,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441038610] [2021-06-05 15:16:16,507 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1441038610] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:16,507 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [59627667] [2021-06-05 15:16:16,507 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 679 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:16,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:16,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:16,531 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:16,532 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:16,638 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:16,663 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:16:16,664 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-06-05 15:16:16,667 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:16,670 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:16,671 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:16,671 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:14 [2021-06-05 15:16:16,702 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:16,702 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [59627667] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:16,702 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:16,702 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:16,702 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1045413078] [2021-06-05 15:16:16,702 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:16,702 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:16,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:16,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:16,702 INFO L87 Difference]: Start difference. First operand 4706 states and 20032 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:18,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:18,033 INFO L93 Difference]: Finished difference Result 6119 states and 25524 transitions. [2021-06-05 15:16:18,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:16:18,033 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:18,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:18,045 INFO L225 Difference]: With dead ends: 6119 [2021-06-05 15:16:18,046 INFO L226 Difference]: Without dead ends: 6080 [2021-06-05 15:16:18,046 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 964.7ms TimeCoverageRelationStatistics Valid=287, Invalid=1693, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:16:18,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6080 states. [2021-06-05 15:16:18,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6080 to 4754. [2021-06-05 15:16:18,109 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4754 states, 4753 states have (on average 4.264254155270356) internal successors, (20268), 4753 states have internal predecessors, (20268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:18,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4754 states to 4754 states and 20268 transitions. [2021-06-05 15:16:18,119 INFO L78 Accepts]: Start accepts. Automaton has 4754 states and 20268 transitions. Word has length 23 [2021-06-05 15:16:18,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:18,119 INFO L482 AbstractCegarLoop]: Abstraction has 4754 states and 20268 transitions. [2021-06-05 15:16:18,119 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:18,119 INFO L276 IsEmpty]: Start isEmpty. Operand 4754 states and 20268 transitions. [2021-06-05 15:16:18,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:18,126 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:18,126 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:18,326 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 679 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1474 [2021-06-05 15:16:18,327 INFO L430 AbstractCegarLoop]: === Iteration 680 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:18,327 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:18,327 INFO L82 PathProgramCache]: Analyzing trace with hash -1681433605, now seen corresponding path program 10 times [2021-06-05 15:16:18,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:18,327 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [210501945] [2021-06-05 15:16:18,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:18,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:18,428 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:18,429 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [210501945] [2021-06-05 15:16:18,429 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [210501945] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:18,429 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674135939] [2021-06-05 15:16:18,429 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 680 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:18,453 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:18,453 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:18,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:18,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:18,534 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:18,534 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:18,535 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:18,543 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:18,544 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:18,544 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:18,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:18,623 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1674135939] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:18,623 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:18,623 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:18,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766409175] [2021-06-05 15:16:18,623 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:18,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:18,623 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:18,623 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:18,623 INFO L87 Difference]: Start difference. First operand 4754 states and 20268 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:19,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:19,986 INFO L93 Difference]: Finished difference Result 5864 states and 24574 transitions. [2021-06-05 15:16:19,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:16:19,986 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:19,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:19,997 INFO L225 Difference]: With dead ends: 5864 [2021-06-05 15:16:19,997 INFO L226 Difference]: Without dead ends: 5812 [2021-06-05 15:16:19,997 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 1211.5ms TimeCoverageRelationStatistics Valid=336, Invalid=1556, Unknown=0, NotChecked=0, Total=1892 [2021-06-05 15:16:20,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5812 states. [2021-06-05 15:16:20,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5812 to 4818. [2021-06-05 15:16:20,060 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4818 states, 4817 states have (on average 4.267801536225867) internal successors, (20558), 4817 states have internal predecessors, (20558), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:20,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4818 states to 4818 states and 20558 transitions. [2021-06-05 15:16:20,107 INFO L78 Accepts]: Start accepts. Automaton has 4818 states and 20558 transitions. Word has length 23 [2021-06-05 15:16:20,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:20,108 INFO L482 AbstractCegarLoop]: Abstraction has 4818 states and 20558 transitions. [2021-06-05 15:16:20,108 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:20,108 INFO L276 IsEmpty]: Start isEmpty. Operand 4818 states and 20558 transitions. [2021-06-05 15:16:20,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:20,114 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:20,114 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:20,314 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 680 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1478 [2021-06-05 15:16:20,315 INFO L430 AbstractCegarLoop]: === Iteration 681 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:20,315 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:20,315 INFO L82 PathProgramCache]: Analyzing trace with hash 735727385, now seen corresponding path program 11 times [2021-06-05 15:16:20,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:20,315 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636883378] [2021-06-05 15:16:20,315 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:20,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:20,415 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:20,415 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636883378] [2021-06-05 15:16:20,415 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636883378] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:20,415 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [786214601] [2021-06-05 15:16:20,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 681 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:20,439 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:16:20,440 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:20,440 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:20,441 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:20,518 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:20,518 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:20,519 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:20,527 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:20,527 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:20,527 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:20,605 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:20,605 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [786214601] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:20,605 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:20,605 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:20,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687229740] [2021-06-05 15:16:20,605 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:20,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:20,605 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:20,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:20,606 INFO L87 Difference]: Start difference. First operand 4818 states and 20558 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:21,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:21,924 INFO L93 Difference]: Finished difference Result 5936 states and 24949 transitions. [2021-06-05 15:16:21,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2021-06-05 15:16:21,925 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:21,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:21,935 INFO L225 Difference]: With dead ends: 5936 [2021-06-05 15:16:21,935 INFO L226 Difference]: Without dead ends: 5892 [2021-06-05 15:16:21,935 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 1118.4ms TimeCoverageRelationStatistics Valid=283, Invalid=1357, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:16:21,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5892 states. [2021-06-05 15:16:21,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5892 to 4877. [2021-06-05 15:16:21,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4877 states, 4876 states have (on average 4.2696882690730105) internal successors, (20819), 4876 states have internal predecessors, (20819), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:22,007 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4877 states to 4877 states and 20819 transitions. [2021-06-05 15:16:22,007 INFO L78 Accepts]: Start accepts. Automaton has 4877 states and 20819 transitions. Word has length 23 [2021-06-05 15:16:22,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:22,007 INFO L482 AbstractCegarLoop]: Abstraction has 4877 states and 20819 transitions. [2021-06-05 15:16:22,007 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:22,007 INFO L276 IsEmpty]: Start isEmpty. Operand 4877 states and 20819 transitions. [2021-06-05 15:16:22,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:22,013 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:22,013 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:22,214 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1480,681 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:22,214 INFO L430 AbstractCegarLoop]: === Iteration 682 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:22,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:22,214 INFO L82 PathProgramCache]: Analyzing trace with hash 1353799003, now seen corresponding path program 7 times [2021-06-05 15:16:22,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:22,214 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [669109215] [2021-06-05 15:16:22,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:22,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:22,296 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:22,297 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [669109215] [2021-06-05 15:16:22,297 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [669109215] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:22,297 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1745687354] [2021-06-05 15:16:22,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 682 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:22,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:22,321 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:22,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:22,435 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:22,435 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:22,437 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:22,444 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:22,445 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:22,445 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:22,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:22,503 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1745687354] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:22,503 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:22,503 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:22,503 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338736842] [2021-06-05 15:16:22,503 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:22,503 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:22,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:22,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:22,503 INFO L87 Difference]: Start difference. First operand 4877 states and 20819 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:23,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:23,257 INFO L93 Difference]: Finished difference Result 5604 states and 23635 transitions. [2021-06-05 15:16:23,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:16:23,258 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:23,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:23,268 INFO L225 Difference]: With dead ends: 5604 [2021-06-05 15:16:23,268 INFO L226 Difference]: Without dead ends: 5573 [2021-06-05 15:16:23,268 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 528.1ms TimeCoverageRelationStatistics Valid=164, Invalid=1096, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:16:23,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5573 states. [2021-06-05 15:16:23,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5573 to 4920. [2021-06-05 15:16:23,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 4.272413092091889) internal successors, (21016), 4919 states have internal predecessors, (21016), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:23,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 21016 transitions. [2021-06-05 15:16:23,339 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 21016 transitions. Word has length 23 [2021-06-05 15:16:23,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:23,339 INFO L482 AbstractCegarLoop]: Abstraction has 4920 states and 21016 transitions. [2021-06-05 15:16:23,340 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:23,340 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 21016 transitions. [2021-06-05 15:16:23,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:23,346 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:23,346 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:23,547 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1482,682 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:23,547 INFO L430 AbstractCegarLoop]: === Iteration 683 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:23,547 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:23,547 INFO L82 PathProgramCache]: Analyzing trace with hash -842865477, now seen corresponding path program 8 times [2021-06-05 15:16:23,547 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:23,547 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772701513] [2021-06-05 15:16:23,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:23,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:23,633 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:23,633 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772701513] [2021-06-05 15:16:23,633 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772701513] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:23,633 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139038102] [2021-06-05 15:16:23,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 683 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:23,657 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:23,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:23,658 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:23,658 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:23,769 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:23,770 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:23,771 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:23,778 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:23,779 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:23,779 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:23,838 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:23,838 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139038102] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:23,838 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:23,838 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:23,839 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93455500] [2021-06-05 15:16:23,839 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:23,839 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:23,839 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:23,839 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:23,839 INFO L87 Difference]: Start difference. First operand 4920 states and 21016 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:25,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:25,013 INFO L93 Difference]: Finished difference Result 5821 states and 24494 transitions. [2021-06-05 15:16:25,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2021-06-05 15:16:25,013 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:25,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:25,024 INFO L225 Difference]: With dead ends: 5821 [2021-06-05 15:16:25,024 INFO L226 Difference]: Without dead ends: 5783 [2021-06-05 15:16:25,025 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 492 ImplicationChecksByTransitivity, 857.6ms TimeCoverageRelationStatistics Valid=253, Invalid=1727, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:16:25,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5783 states. [2021-06-05 15:16:25,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5783 to 4920. [2021-06-05 15:16:25,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 4.267737344988819) internal successors, (20993), 4919 states have internal predecessors, (20993), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:25,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 20993 transitions. [2021-06-05 15:16:25,098 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 20993 transitions. Word has length 23 [2021-06-05 15:16:25,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:25,098 INFO L482 AbstractCegarLoop]: Abstraction has 4920 states and 20993 transitions. [2021-06-05 15:16:25,098 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:25,098 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 20993 transitions. [2021-06-05 15:16:25,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:25,105 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:25,105 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:25,305 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 683 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1484 [2021-06-05 15:16:25,306 INFO L430 AbstractCegarLoop]: === Iteration 684 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:25,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:25,306 INFO L82 PathProgramCache]: Analyzing trace with hash 252903551, now seen corresponding path program 8 times [2021-06-05 15:16:25,306 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:25,306 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171091827] [2021-06-05 15:16:25,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:25,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:25,388 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:25,389 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:25,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171091827] [2021-06-05 15:16:25,389 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [171091827] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:25,389 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274799704] [2021-06-05 15:16:25,389 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 684 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:25,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:25,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:25,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:25,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:25,547 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:25,547 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:25,548 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:25,557 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:25,557 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:25,558 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:16:25,642 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:25,642 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1274799704] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:25,642 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:25,642 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:25,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1279524714] [2021-06-05 15:16:25,642 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:25,642 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:25,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:25,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:25,642 INFO L87 Difference]: Start difference. First operand 4920 states and 20993 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:26,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:26,804 INFO L93 Difference]: Finished difference Result 5544 states and 23419 transitions. [2021-06-05 15:16:26,804 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2021-06-05 15:16:26,805 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:26,805 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:26,815 INFO L225 Difference]: With dead ends: 5544 [2021-06-05 15:16:26,815 INFO L226 Difference]: Without dead ends: 5518 [2021-06-05 15:16:26,816 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 823.3ms TimeCoverageRelationStatistics Valid=207, Invalid=1599, Unknown=0, NotChecked=0, Total=1806 [2021-06-05 15:16:26,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5518 states. [2021-06-05 15:16:26,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5518 to 4931. [2021-06-05 15:16:26,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4931 states, 4930 states have (on average 4.266937119675457) internal successors, (21036), 4930 states have internal predecessors, (21036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4931 states to 4931 states and 21036 transitions. [2021-06-05 15:16:26,885 INFO L78 Accepts]: Start accepts. Automaton has 4931 states and 21036 transitions. Word has length 23 [2021-06-05 15:16:26,885 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:26,885 INFO L482 AbstractCegarLoop]: Abstraction has 4931 states and 21036 transitions. [2021-06-05 15:16:26,885 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:26,886 INFO L276 IsEmpty]: Start isEmpty. Operand 4931 states and 21036 transitions. [2021-06-05 15:16:26,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:26,892 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:26,892 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:27,092 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 684 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1486 [2021-06-05 15:16:27,093 INFO L430 AbstractCegarLoop]: === Iteration 685 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:27,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:27,093 INFO L82 PathProgramCache]: Analyzing trace with hash -1781500359, now seen corresponding path program 9 times [2021-06-05 15:16:27,093 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:27,093 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2070084719] [2021-06-05 15:16:27,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:27,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:27,176 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:27,176 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2070084719] [2021-06-05 15:16:27,176 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2070084719] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:27,176 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [474854516] [2021-06-05 15:16:27,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 685 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:27,201 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:27,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:27,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:27,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:27,306 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:16:27,306 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:16:27,310 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:27,328 INFO L628 ElimStorePlain]: treesize reduction 55, result has 23.6 percent of original size [2021-06-05 15:16:27,328 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:27,328 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:28, output treesize:17 [2021-06-05 15:16:27,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:27,379 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [474854516] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:27,379 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:27,379 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:27,379 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256817766] [2021-06-05 15:16:27,379 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:27,379 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:27,380 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:27,380 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=294, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:27,380 INFO L87 Difference]: Start difference. First operand 4931 states and 21036 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:28,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:28,188 INFO L93 Difference]: Finished difference Result 5335 states and 22569 transitions. [2021-06-05 15:16:28,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2021-06-05 15:16:28,188 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:28,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:28,198 INFO L225 Difference]: With dead ends: 5335 [2021-06-05 15:16:28,198 INFO L226 Difference]: Without dead ends: 5294 [2021-06-05 15:16:28,198 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 436.3ms TimeCoverageRelationStatistics Valid=124, Invalid=868, Unknown=0, NotChecked=0, Total=992 [2021-06-05 15:16:28,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5294 states. [2021-06-05 15:16:28,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5294 to 4898. [2021-06-05 15:16:28,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4898 states, 4897 states have (on average 4.267919134163773) internal successors, (20900), 4897 states have internal predecessors, (20900), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:28,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4898 states to 4898 states and 20900 transitions. [2021-06-05 15:16:28,267 INFO L78 Accepts]: Start accepts. Automaton has 4898 states and 20900 transitions. Word has length 23 [2021-06-05 15:16:28,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:28,267 INFO L482 AbstractCegarLoop]: Abstraction has 4898 states and 20900 transitions. [2021-06-05 15:16:28,267 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:28,267 INFO L276 IsEmpty]: Start isEmpty. Operand 4898 states and 20900 transitions. [2021-06-05 15:16:28,274 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:28,274 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:28,274 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:28,474 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 685 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1488 [2021-06-05 15:16:28,474 INFO L430 AbstractCegarLoop]: === Iteration 686 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:28,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:28,474 INFO L82 PathProgramCache]: Analyzing trace with hash -337684007, now seen corresponding path program 10 times [2021-06-05 15:16:28,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:28,475 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1253398325] [2021-06-05 15:16:28,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:28,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:28,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:28,555 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:28,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1253398325] [2021-06-05 15:16:28,555 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1253398325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:28,555 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1836162153] [2021-06-05 15:16:28,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 686 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:28,579 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:28,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:28,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:28,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:28,689 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:28,689 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:28,691 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:28,698 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:28,699 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:28,699 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:20, output treesize:29 [2021-06-05 15:16:28,754 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:28,754 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1836162153] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:28,755 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:28,755 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:28,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [752175621] [2021-06-05 15:16:28,755 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:28,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:28,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:28,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=319, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:28,755 INFO L87 Difference]: Start difference. First operand 4898 states and 20900 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:29,529 INFO L93 Difference]: Finished difference Result 6273 states and 26251 transitions. [2021-06-05 15:16:29,529 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2021-06-05 15:16:29,529 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:29,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:29,541 INFO L225 Difference]: With dead ends: 6273 [2021-06-05 15:16:29,542 INFO L226 Difference]: Without dead ends: 6212 [2021-06-05 15:16:29,542 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 527.0ms TimeCoverageRelationStatistics Valid=168, Invalid=1092, Unknown=0, NotChecked=0, Total=1260 [2021-06-05 15:16:29,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6212 states. [2021-06-05 15:16:29,604 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6212 to 4920. [2021-06-05 15:16:29,608 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4920 states, 4919 states have (on average 4.2675340516365114) internal successors, (20992), 4919 states have internal predecessors, (20992), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4920 states to 4920 states and 20992 transitions. [2021-06-05 15:16:29,619 INFO L78 Accepts]: Start accepts. Automaton has 4920 states and 20992 transitions. Word has length 23 [2021-06-05 15:16:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:29,619 INFO L482 AbstractCegarLoop]: Abstraction has 4920 states and 20992 transitions. [2021-06-05 15:16:29,619 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:29,619 INFO L276 IsEmpty]: Start isEmpty. Operand 4920 states and 20992 transitions. [2021-06-05 15:16:29,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:29,626 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:29,626 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:29,826 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1492,686 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:29,826 INFO L430 AbstractCegarLoop]: === Iteration 687 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:29,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:29,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1760618809, now seen corresponding path program 9 times [2021-06-05 15:16:29,827 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:29,827 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [27909430] [2021-06-05 15:16:29,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:29,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:29,910 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:29,910 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:29,910 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [27909430] [2021-06-05 15:16:29,910 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [27909430] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:29,911 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512734244] [2021-06-05 15:16:29,911 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 687 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:29,935 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:29,935 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:29,936 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:29,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:30,051 INFO L354 Elim1Store]: treesize reduction 10, result has 78.7 percent of original size [2021-06-05 15:16:30,052 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 22 treesize of output 48 [2021-06-05 15:16:30,056 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:30,076 INFO L628 ElimStorePlain]: treesize reduction 66, result has 17.5 percent of original size [2021-06-05 15:16:30,077 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:30,077 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:25, output treesize:14 [2021-06-05 15:16:30,110 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:30,110 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [512734244] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:30,110 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:30,110 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:30,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [306951613] [2021-06-05 15:16:30,111 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:30,111 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:30,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:30,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:30,111 INFO L87 Difference]: Start difference. First operand 4920 states and 20992 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:30,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:30,677 INFO L93 Difference]: Finished difference Result 5832 states and 24511 transitions. [2021-06-05 15:16:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-06-05 15:16:30,678 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:30,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:30,689 INFO L225 Difference]: With dead ends: 5832 [2021-06-05 15:16:30,689 INFO L226 Difference]: Without dead ends: 5788 [2021-06-05 15:16:30,689 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 398.9ms TimeCoverageRelationStatistics Valid=115, Invalid=697, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:30,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5788 states. [2021-06-05 15:16:30,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5788 to 4998. [2021-06-05 15:16:30,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4998 states, 4997 states have (on average 4.283970382229338) internal successors, (21407), 4997 states have internal predecessors, (21407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:30,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4998 states to 4998 states and 21407 transitions. [2021-06-05 15:16:30,761 INFO L78 Accepts]: Start accepts. Automaton has 4998 states and 21407 transitions. Word has length 23 [2021-06-05 15:16:30,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:30,761 INFO L482 AbstractCegarLoop]: Abstraction has 4998 states and 21407 transitions. [2021-06-05 15:16:30,761 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:30,761 INFO L276 IsEmpty]: Start isEmpty. Operand 4998 states and 21407 transitions. [2021-06-05 15:16:30,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:30,768 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:30,768 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:30,969 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1494,687 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:30,969 INFO L430 AbstractCegarLoop]: === Iteration 688 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:30,969 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:30,969 INFO L82 PathProgramCache]: Analyzing trace with hash -1838179847, now seen corresponding path program 11 times [2021-06-05 15:16:30,969 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:30,969 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605726917] [2021-06-05 15:16:30,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:30,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:31,049 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:31,049 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:31,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605726917] [2021-06-05 15:16:31,049 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605726917] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:31,049 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [652214325] [2021-06-05 15:16:31,049 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 688 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:31,074 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:16:31,074 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:31,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:31,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:31,167 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:31,167 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:31,168 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:31,176 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:31,176 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:31,176 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:31,255 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:31,255 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [652214325] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:31,255 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:31,255 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:31,255 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1201107716] [2021-06-05 15:16:31,255 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:31,256 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:31,256 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:31,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:31,256 INFO L87 Difference]: Start difference. First operand 4998 states and 21407 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:32,283 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:32,283 INFO L93 Difference]: Finished difference Result 6140 states and 25832 transitions. [2021-06-05 15:16:32,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:16:32,283 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:32,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:32,294 INFO L225 Difference]: With dead ends: 6140 [2021-06-05 15:16:32,294 INFO L226 Difference]: Without dead ends: 6088 [2021-06-05 15:16:32,295 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 784.6ms TimeCoverageRelationStatistics Valid=226, Invalid=1496, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:16:32,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6088 states. [2021-06-05 15:16:32,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6088 to 5006. [2021-06-05 15:16:32,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5006 states, 5005 states have (on average 4.281718281718281) internal successors, (21430), 5005 states have internal predecessors, (21430), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:32,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5006 states to 5006 states and 21430 transitions. [2021-06-05 15:16:32,369 INFO L78 Accepts]: Start accepts. Automaton has 5006 states and 21430 transitions. Word has length 23 [2021-06-05 15:16:32,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:32,369 INFO L482 AbstractCegarLoop]: Abstraction has 5006 states and 21430 transitions. [2021-06-05 15:16:32,369 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:32,370 INFO L276 IsEmpty]: Start isEmpty. Operand 5006 states and 21430 transitions. [2021-06-05 15:16:32,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:32,376 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:32,376 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:32,577 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1498,688 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:32,577 INFO L430 AbstractCegarLoop]: === Iteration 689 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:32,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:32,577 INFO L82 PathProgramCache]: Analyzing trace with hash 578981143, now seen corresponding path program 12 times [2021-06-05 15:16:32,577 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:32,577 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [381243671] [2021-06-05 15:16:32,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:32,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:32,659 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:32,659 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [381243671] [2021-06-05 15:16:32,659 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [381243671] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:32,659 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [639207943] [2021-06-05 15:16:32,659 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 689 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:32,684 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-06-05 15:16:32,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:32,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:32,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:32,781 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:32,782 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:32,783 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:32,793 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:32,793 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:32,794 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:32,886 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:32,886 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [639207943] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:32,886 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:32,886 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:32,886 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453931043] [2021-06-05 15:16:32,886 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:32,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:32,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:32,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:32,886 INFO L87 Difference]: Start difference. First operand 5006 states and 21430 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:33,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:33,894 INFO L93 Difference]: Finished difference Result 6206 states and 26108 transitions. [2021-06-05 15:16:33,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:16:33,894 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:33,894 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:33,905 INFO L225 Difference]: With dead ends: 6206 [2021-06-05 15:16:33,905 INFO L226 Difference]: Without dead ends: 6162 [2021-06-05 15:16:33,906 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 773.0ms TimeCoverageRelationStatistics Valid=217, Invalid=1343, Unknown=0, NotChecked=0, Total=1560 [2021-06-05 15:16:33,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6162 states. [2021-06-05 15:16:33,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6162 to 4998. [2021-06-05 15:16:33,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4998 states, 4997 states have (on average 4.283970382229338) internal successors, (21407), 4997 states have internal predecessors, (21407), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:33,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4998 states to 4998 states and 21407 transitions. [2021-06-05 15:16:33,982 INFO L78 Accepts]: Start accepts. Automaton has 4998 states and 21407 transitions. Word has length 23 [2021-06-05 15:16:33,982 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:33,982 INFO L482 AbstractCegarLoop]: Abstraction has 4998 states and 21407 transitions. [2021-06-05 15:16:33,982 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:33,982 INFO L276 IsEmpty]: Start isEmpty. Operand 4998 states and 21407 transitions. [2021-06-05 15:16:33,989 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:33,989 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:33,989 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:34,189 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 689 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1500 [2021-06-05 15:16:34,189 INFO L430 AbstractCegarLoop]: === Iteration 690 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:34,190 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:34,190 INFO L82 PathProgramCache]: Analyzing trace with hash -1127360743, now seen corresponding path program 10 times [2021-06-05 15:16:34,190 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:34,190 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [336930727] [2021-06-05 15:16:34,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:34,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:34,285 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:34,286 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:34,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [336930727] [2021-06-05 15:16:34,286 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [336930727] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:34,286 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1319810962] [2021-06-05 15:16:34,286 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 690 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:34,310 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:34,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:34,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:34,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:34,408 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:34,408 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:34,409 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:34,417 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:34,417 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:34,417 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:34,499 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:34,499 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1319810962] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:34,499 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:34,499 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:34,499 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972341677] [2021-06-05 15:16:34,499 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:34,499 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:34,499 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:34,499 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:34,500 INFO L87 Difference]: Start difference. First operand 4998 states and 21407 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:36,137 INFO L93 Difference]: Finished difference Result 6309 states and 26471 transitions. [2021-06-05 15:16:36,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:16:36,138 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:36,138 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:36,149 INFO L225 Difference]: With dead ends: 6309 [2021-06-05 15:16:36,149 INFO L226 Difference]: Without dead ends: 6253 [2021-06-05 15:16:36,149 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 700 ImplicationChecksByTransitivity, 1322.6ms TimeCoverageRelationStatistics Valid=354, Invalid=2298, Unknown=0, NotChecked=0, Total=2652 [2021-06-05 15:16:36,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6253 states. [2021-06-05 15:16:36,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6253 to 5083. [2021-06-05 15:16:36,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5083 states, 5082 states have (on average 4.285123966942149) internal successors, (21777), 5082 states have internal predecessors, (21777), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5083 states to 5083 states and 21777 transitions. [2021-06-05 15:16:36,225 INFO L78 Accepts]: Start accepts. Automaton has 5083 states and 21777 transitions. Word has length 23 [2021-06-05 15:16:36,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:36,225 INFO L482 AbstractCegarLoop]: Abstraction has 5083 states and 21777 transitions. [2021-06-05 15:16:36,225 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:36,225 INFO L276 IsEmpty]: Start isEmpty. Operand 5083 states and 21777 transitions. [2021-06-05 15:16:36,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:36,232 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:36,232 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:36,432 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 690 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1502 [2021-06-05 15:16:36,432 INFO L430 AbstractCegarLoop]: === Iteration 691 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:36,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:36,433 INFO L82 PathProgramCache]: Analyzing trace with hash 604955415, now seen corresponding path program 11 times [2021-06-05 15:16:36,433 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:36,433 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176593308] [2021-06-05 15:16:36,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:36,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:36,530 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:36,530 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:36,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176593308] [2021-06-05 15:16:36,530 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176593308] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:36,530 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [736647551] [2021-06-05 15:16:36,530 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 691 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:36,555 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2021-06-05 15:16:36,555 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:36,556 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:36,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:36,649 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:36,649 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:36,650 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:36,657 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:36,658 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:36,658 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:21, output treesize:28 [2021-06-05 15:16:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:36,746 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [736647551] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:36,746 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:36,746 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:36,746 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1072142964] [2021-06-05 15:16:36,746 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:36,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:36,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:36,747 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=321, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:36,747 INFO L87 Difference]: Start difference. First operand 5083 states and 21777 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:37,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:37,956 INFO L93 Difference]: Finished difference Result 6373 states and 26818 transitions. [2021-06-05 15:16:37,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2021-06-05 15:16:37,957 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:37,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:37,968 INFO L225 Difference]: With dead ends: 6373 [2021-06-05 15:16:37,968 INFO L226 Difference]: Without dead ends: 6325 [2021-06-05 15:16:37,969 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 946.3ms TimeCoverageRelationStatistics Valid=234, Invalid=1406, Unknown=0, NotChecked=0, Total=1640 [2021-06-05 15:16:37,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6325 states. [2021-06-05 15:16:38,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6325 to 5163. [2021-06-05 15:16:38,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5163 states, 5162 states have (on average 4.286129407206509) internal successors, (22125), 5162 states have internal predecessors, (22125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5163 states to 5163 states and 22125 transitions. [2021-06-05 15:16:38,047 INFO L78 Accepts]: Start accepts. Automaton has 5163 states and 22125 transitions. Word has length 23 [2021-06-05 15:16:38,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:38,047 INFO L482 AbstractCegarLoop]: Abstraction has 5163 states and 22125 transitions. [2021-06-05 15:16:38,047 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:38,047 INFO L276 IsEmpty]: Start isEmpty. Operand 5163 states and 22125 transitions. [2021-06-05 15:16:38,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:38,054 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:38,054 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:38,254 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1504,691 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:38,255 INFO L430 AbstractCegarLoop]: === Iteration 692 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:38,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:38,255 INFO L82 PathProgramCache]: Analyzing trace with hash -1860472391, now seen corresponding path program 13 times [2021-06-05 15:16:38,255 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:38,255 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1394919121] [2021-06-05 15:16:38,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:38,257 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:38,339 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1394919121] [2021-06-05 15:16:38,339 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1394919121] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:38,339 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384328621] [2021-06-05 15:16:38,339 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 692 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:38,362 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:38,363 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:38,363 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:38,479 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:38,480 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:38,481 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:38,489 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:38,490 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:38,490 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:16:38,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:38,599 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1384328621] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:38,599 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:38,599 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:38,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773386672] [2021-06-05 15:16:38,599 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:38,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:38,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:38,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=327, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:38,599 INFO L87 Difference]: Start difference. First operand 5163 states and 22125 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:39,907 INFO L93 Difference]: Finished difference Result 5607 states and 23832 transitions. [2021-06-05 15:16:39,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2021-06-05 15:16:39,907 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:39,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:39,917 INFO L225 Difference]: With dead ends: 5607 [2021-06-05 15:16:39,917 INFO L226 Difference]: Without dead ends: 5581 [2021-06-05 15:16:39,918 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 464 ImplicationChecksByTransitivity, 964.8ms TimeCoverageRelationStatistics Valid=250, Invalid=1730, Unknown=0, NotChecked=0, Total=1980 [2021-06-05 15:16:39,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5581 states. [2021-06-05 15:16:39,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5581 to 5180. [2021-06-05 15:16:39,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5180 states, 5179 states have (on average 4.284997103687971) internal successors, (22192), 5179 states have internal predecessors, (22192), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5180 states to 5180 states and 22192 transitions. [2021-06-05 15:16:39,991 INFO L78 Accepts]: Start accepts. Automaton has 5180 states and 22192 transitions. Word has length 23 [2021-06-05 15:16:39,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:39,991 INFO L482 AbstractCegarLoop]: Abstraction has 5180 states and 22192 transitions. [2021-06-05 15:16:39,991 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:39,991 INFO L276 IsEmpty]: Start isEmpty. Operand 5180 states and 22192 transitions. [2021-06-05 15:16:39,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:39,999 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:39,999 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:40,199 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 692 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1506 [2021-06-05 15:16:40,199 INFO L430 AbstractCegarLoop]: === Iteration 693 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:40,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:40,199 INFO L82 PathProgramCache]: Analyzing trace with hash 400090995, now seen corresponding path program 14 times [2021-06-05 15:16:40,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:40,199 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484341249] [2021-06-05 15:16:40,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:40,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:40,282 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,283 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484341249] [2021-06-05 15:16:40,283 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484341249] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,283 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [498384328] [2021-06-05 15:16:40,283 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 693 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:40,307 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:40,307 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:40,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:40,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:40,392 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:40,393 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 27 treesize of output 43 [2021-06-05 15:16:40,394 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:40,403 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:40,404 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:40,404 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:30, output treesize:41 [2021-06-05 15:16:40,515 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:40,515 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [498384328] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:40,515 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:40,515 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:40,515 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831654884] [2021-06-05 15:16:40,515 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:40,515 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:40,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:40,516 INFO L87 Difference]: Start difference. First operand 5180 states and 22192 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:41,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:41,937 INFO L93 Difference]: Finished difference Result 5689 states and 24150 transitions. [2021-06-05 15:16:41,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2021-06-05 15:16:41,937 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:41,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:41,947 INFO L225 Difference]: With dead ends: 5689 [2021-06-05 15:16:41,947 INFO L226 Difference]: Without dead ends: 5661 [2021-06-05 15:16:41,947 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 571 ImplicationChecksByTransitivity, 1098.2ms TimeCoverageRelationStatistics Valid=296, Invalid=1960, Unknown=0, NotChecked=0, Total=2256 [2021-06-05 15:16:41,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5661 states. [2021-06-05 15:16:42,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5661 to 5169. [2021-06-05 15:16:42,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5169 states, 5168 states have (on average 4.285797213622291) internal successors, (22149), 5168 states have internal predecessors, (22149), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:42,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5169 states to 5169 states and 22149 transitions. [2021-06-05 15:16:42,021 INFO L78 Accepts]: Start accepts. Automaton has 5169 states and 22149 transitions. Word has length 23 [2021-06-05 15:16:42,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:42,021 INFO L482 AbstractCegarLoop]: Abstraction has 5169 states and 22149 transitions. [2021-06-05 15:16:42,021 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:42,021 INFO L276 IsEmpty]: Start isEmpty. Operand 5169 states and 22149 transitions. [2021-06-05 15:16:42,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:42,028 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:42,028 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:42,228 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1508,693 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:42,228 INFO L430 AbstractCegarLoop]: === Iteration 694 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:42,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:42,228 INFO L82 PathProgramCache]: Analyzing trace with hash 301720955, now seen corresponding path program 15 times [2021-06-05 15:16:42,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:42,229 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795435622] [2021-06-05 15:16:42,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:42,230 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:42,311 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:42,311 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:42,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795435622] [2021-06-05 15:16:42,311 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [795435622] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,311 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320364770] [2021-06-05 15:16:42,312 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 694 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:42,336 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:42,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:42,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 35 conjunts are in the unsatisfiable core [2021-06-05 15:16:42,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:42,419 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:42,425 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:42,425 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 27 treesize of output 33 [2021-06-05 15:16:42,426 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:42,434 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:42,434 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:42,435 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:35, output treesize:34 [2021-06-05 15:16:42,523 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:42,524 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320364770] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:42,524 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:42,524 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:42,524 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723778647] [2021-06-05 15:16:42,524 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:42,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:42,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:42,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:42,524 INFO L87 Difference]: Start difference. First operand 5169 states and 22149 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:43,761 INFO L93 Difference]: Finished difference Result 5776 states and 24486 transitions. [2021-06-05 15:16:43,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:16:43,761 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:43,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:43,771 INFO L225 Difference]: With dead ends: 5776 [2021-06-05 15:16:43,771 INFO L226 Difference]: Without dead ends: 5767 [2021-06-05 15:16:43,772 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 1028.8ms TimeCoverageRelationStatistics Valid=283, Invalid=1439, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:16:43,777 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-06-05 15:16:43,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5175. [2021-06-05 15:16:43,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5175 states, 5174 states have (on average 4.285465790490916) internal successors, (22173), 5174 states have internal predecessors, (22173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5175 states to 5175 states and 22173 transitions. [2021-06-05 15:16:43,845 INFO L78 Accepts]: Start accepts. Automaton has 5175 states and 22173 transitions. Word has length 23 [2021-06-05 15:16:43,846 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:43,846 INFO L482 AbstractCegarLoop]: Abstraction has 5175 states and 22173 transitions. [2021-06-05 15:16:43,846 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:43,846 INFO L276 IsEmpty]: Start isEmpty. Operand 5175 states and 22173 transitions. [2021-06-05 15:16:43,853 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:43,853 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:43,853 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:44,053 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1510,694 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:44,053 INFO L430 AbstractCegarLoop]: === Iteration 695 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash -1970702117, now seen corresponding path program 16 times [2021-06-05 15:16:44,053 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:44,053 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545906535] [2021-06-05 15:16:44,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:44,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:44,135 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:44,135 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:44,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545906535] [2021-06-05 15:16:44,135 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545906535] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:44,135 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492696905] [2021-06-05 15:16:44,135 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 695 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:44,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-06-05 15:16:44,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:44,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:44,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:44,243 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:44,243 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:44,244 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:44,253 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:44,253 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:44,253 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:16:44,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:44,358 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492696905] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:44,358 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:44,358 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:44,359 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1080441099] [2021-06-05 15:16:44,359 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:44,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:44,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:44,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:44,359 INFO L87 Difference]: Start difference. First operand 5175 states and 22173 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:45,531 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:45,532 INFO L93 Difference]: Finished difference Result 5644 states and 24008 transitions. [2021-06-05 15:16:45,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2021-06-05 15:16:45,532 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:45,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:45,542 INFO L225 Difference]: With dead ends: 5644 [2021-06-05 15:16:45,542 INFO L226 Difference]: Without dead ends: 5622 [2021-06-05 15:16:45,543 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 915.5ms TimeCoverageRelationStatistics Valid=230, Invalid=1492, Unknown=0, NotChecked=0, Total=1722 [2021-06-05 15:16:45,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5622 states. [2021-06-05 15:16:45,600 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5622 to 5187. [2021-06-05 15:16:45,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5187 states, 5186 states have (on average 4.287119166988044) internal successors, (22233), 5186 states have internal predecessors, (22233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:45,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5187 states to 5187 states and 22233 transitions. [2021-06-05 15:16:45,617 INFO L78 Accepts]: Start accepts. Automaton has 5187 states and 22233 transitions. Word has length 23 [2021-06-05 15:16:45,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:45,617 INFO L482 AbstractCegarLoop]: Abstraction has 5187 states and 22233 transitions. [2021-06-05 15:16:45,618 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:45,618 INFO L276 IsEmpty]: Start isEmpty. Operand 5187 states and 22233 transitions. [2021-06-05 15:16:45,625 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:45,625 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:45,625 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:45,825 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 695 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1511 [2021-06-05 15:16:45,825 INFO L430 AbstractCegarLoop]: === Iteration 696 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:45,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:45,825 INFO L82 PathProgramCache]: Analyzing trace with hash 532933851, now seen corresponding path program 17 times [2021-06-05 15:16:45,825 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:45,825 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [710388918] [2021-06-05 15:16:45,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:45,827 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:45,906 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:45,906 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [710388918] [2021-06-05 15:16:45,906 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [710388918] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:45,906 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [373757474] [2021-06-05 15:16:45,906 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 696 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:45,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-06-05 15:16:45,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:45,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:45,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:46,013 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:46,013 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 37 [2021-06-05 15:16:46,014 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:46,023 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:46,024 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:46,024 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:24, output treesize:31 [2021-06-05 15:16:46,125 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:46,125 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [373757474] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:46,125 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:46,125 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:46,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [939959353] [2021-06-05 15:16:46,125 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:46,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:46,126 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:46,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:46,126 INFO L87 Difference]: Start difference. First operand 5187 states and 22233 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:47,617 INFO L93 Difference]: Finished difference Result 5817 states and 24650 transitions. [2021-06-05 15:16:47,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2021-06-05 15:16:47,618 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:47,618 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:47,628 INFO L225 Difference]: With dead ends: 5817 [2021-06-05 15:16:47,628 INFO L226 Difference]: Without dead ends: 5767 [2021-06-05 15:16:47,628 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1080.2ms TimeCoverageRelationStatistics Valid=320, Invalid=2230, Unknown=0, NotChecked=0, Total=2550 [2021-06-05 15:16:47,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5767 states. [2021-06-05 15:16:47,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5767 to 5202. [2021-06-05 15:16:47,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5202 states, 5201 states have (on average 4.286291097865795) internal successors, (22293), 5201 states have internal predecessors, (22293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5202 states to 5202 states and 22293 transitions. [2021-06-05 15:16:47,703 INFO L78 Accepts]: Start accepts. Automaton has 5202 states and 22293 transitions. Word has length 23 [2021-06-05 15:16:47,703 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:47,703 INFO L482 AbstractCegarLoop]: Abstraction has 5202 states and 22293 transitions. [2021-06-05 15:16:47,703 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:47,703 INFO L276 IsEmpty]: Start isEmpty. Operand 5202 states and 22293 transitions. [2021-06-05 15:16:47,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:47,710 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:47,710 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:47,910 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1513,696 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:47,910 INFO L430 AbstractCegarLoop]: === Iteration 697 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:47,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:47,911 INFO L82 PathProgramCache]: Analyzing trace with hash -2029717287, now seen corresponding path program 18 times [2021-06-05 15:16:47,911 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:47,911 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235393034] [2021-06-05 15:16:47,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:47,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:48,005 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:48,005 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:48,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235393034] [2021-06-05 15:16:48,005 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1235393034] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:48,005 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247120748] [2021-06-05 15:16:48,005 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 697 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:48,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-06-05 15:16:48,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:48,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:48,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:48,143 INFO L354 Elim1Store]: treesize reduction 18, result has 67.3 percent of original size [2021-06-05 15:16:48,143 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 5 new quantified variables, introduced 6 case distinctions, treesize of input 52 treesize of output 69 [2021-06-05 15:16:48,145 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:48,158 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:48,158 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:48,159 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:52, output treesize:53 [2021-06-05 15:16:48,267 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:48,267 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [247120748] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:48,267 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:48,267 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:48,267 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591892047] [2021-06-05 15:16:48,268 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:48,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:48,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:48,268 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=329, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:48,268 INFO L87 Difference]: Start difference. First operand 5202 states and 22293 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:49,224 INFO L93 Difference]: Finished difference Result 5663 states and 24093 transitions. [2021-06-05 15:16:49,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2021-06-05 15:16:49,225 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:49,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:49,234 INFO L225 Difference]: With dead ends: 5663 [2021-06-05 15:16:49,235 INFO L226 Difference]: Without dead ends: 5651 [2021-06-05 15:16:49,235 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 772.4ms TimeCoverageRelationStatistics Valid=189, Invalid=1293, Unknown=0, NotChecked=0, Total=1482 [2021-06-05 15:16:49,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5651 states. [2021-06-05 15:16:49,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5651 to 5202. [2021-06-05 15:16:49,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5202 states, 5201 states have (on average 4.286291097865795) internal successors, (22293), 5201 states have internal predecessors, (22293), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5202 states to 5202 states and 22293 transitions. [2021-06-05 15:16:49,306 INFO L78 Accepts]: Start accepts. Automaton has 5202 states and 22293 transitions. Word has length 23 [2021-06-05 15:16:49,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:49,306 INFO L482 AbstractCegarLoop]: Abstraction has 5202 states and 22293 transitions. [2021-06-05 15:16:49,306 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:49,306 INFO L276 IsEmpty]: Start isEmpty. Operand 5202 states and 22293 transitions. [2021-06-05 15:16:49,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:49,313 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:49,313 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:49,514 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1515,697 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:49,514 INFO L430 AbstractCegarLoop]: === Iteration 698 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:49,514 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:49,514 INFO L82 PathProgramCache]: Analyzing trace with hash 500090623, now seen corresponding path program 19 times [2021-06-05 15:16:49,514 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:49,514 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1872904409] [2021-06-05 15:16:49,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:49,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:49,620 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:49,620 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:49,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1872904409] [2021-06-05 15:16:49,620 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1872904409] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:49,620 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159582364] [2021-06-05 15:16:49,620 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 698 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:49,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:49,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:49,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:49,729 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:49,729 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:49,730 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:49,739 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:49,739 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:49,739 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:16:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:49,818 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159582364] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:49,818 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:49,818 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:49,818 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795089578] [2021-06-05 15:16:49,818 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:49,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:49,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:49,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=289, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:49,819 INFO L87 Difference]: Start difference. First operand 5202 states and 22293 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:50,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:50,341 INFO L93 Difference]: Finished difference Result 5473 states and 23312 transitions. [2021-06-05 15:16:50,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2021-06-05 15:16:50,342 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:50,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:50,351 INFO L225 Difference]: With dead ends: 5473 [2021-06-05 15:16:50,352 INFO L226 Difference]: Without dead ends: 5447 [2021-06-05 15:16:50,352 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 478.7ms TimeCoverageRelationStatistics Valid=140, Invalid=616, Unknown=0, NotChecked=0, Total=756 [2021-06-05 15:16:50,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5447 states. [2021-06-05 15:16:50,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5447 to 5216. [2021-06-05 15:16:50,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5216 states, 5215 states have (on average 4.285139022051774) internal successors, (22347), 5215 states have internal predecessors, (22347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:50,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5216 states to 5216 states and 22347 transitions. [2021-06-05 15:16:50,426 INFO L78 Accepts]: Start accepts. Automaton has 5216 states and 22347 transitions. Word has length 23 [2021-06-05 15:16:50,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:50,426 INFO L482 AbstractCegarLoop]: Abstraction has 5216 states and 22347 transitions. [2021-06-05 15:16:50,426 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:50,426 INFO L276 IsEmpty]: Start isEmpty. Operand 5216 states and 22347 transitions. [2021-06-05 15:16:50,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:50,434 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:50,434 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:50,634 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1519,698 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:50,634 INFO L430 AbstractCegarLoop]: === Iteration 699 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:50,634 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:50,634 INFO L82 PathProgramCache]: Analyzing trace with hash -1534313287, now seen corresponding path program 20 times [2021-06-05 15:16:50,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:50,634 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [125135718] [2021-06-05 15:16:50,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:50,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:50,742 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:50,742 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:50,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [125135718] [2021-06-05 15:16:50,742 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [125135718] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:50,742 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2071585973] [2021-06-05 15:16:50,742 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 699 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:50,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-06-05 15:16:50,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:50,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:50,767 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:50,851 INFO L354 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:50,852 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 20 treesize of output 36 [2021-06-05 15:16:50,853 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 1 xjuncts. [2021-06-05 15:16:50,861 INFO L628 ElimStorePlain]: treesize reduction 0, result has 100.0 percent of original size [2021-06-05 15:16:50,862 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:50,862 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:23, output treesize:32 [2021-06-05 15:16:50,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:50,942 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2071585973] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:50,942 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:50,942 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 18 [2021-06-05 15:16:50,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901905238] [2021-06-05 15:16:50,942 INFO L462 AbstractCegarLoop]: Interpolant automaton has 19 states [2021-06-05 15:16:50,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:50,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-06-05 15:16:50,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=290, Unknown=0, NotChecked=0, Total=342 [2021-06-05 15:16:50,943 INFO L87 Difference]: Start difference. First operand 5216 states and 22347 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:51,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-06-05 15:16:51,537 INFO L93 Difference]: Finished difference Result 5454 states and 23238 transitions. [2021-06-05 15:16:51,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-06-05 15:16:51,537 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2021-06-05 15:16:51,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-06-05 15:16:51,547 INFO L225 Difference]: With dead ends: 5454 [2021-06-05 15:16:51,547 INFO L226 Difference]: Without dead ends: 5426 [2021-06-05 15:16:51,547 INFO L777 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 124 ImplicationChecksByTransitivity, 568.0ms TimeCoverageRelationStatistics Valid=148, Invalid=664, Unknown=0, NotChecked=0, Total=812 [2021-06-05 15:16:51,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5426 states. [2021-06-05 15:16:51,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5426 to 5205. [2021-06-05 15:16:51,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5205 states, 5204 states have (on average 4.2853574173712525) internal successors, (22301), 5204 states have internal predecessors, (22301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:51,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5205 states to 5205 states and 22301 transitions. [2021-06-05 15:16:51,623 INFO L78 Accepts]: Start accepts. Automaton has 5205 states and 22301 transitions. Word has length 23 [2021-06-05 15:16:51,623 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-06-05 15:16:51,623 INFO L482 AbstractCegarLoop]: Abstraction has 5205 states and 22301 transitions. [2021-06-05 15:16:51,623 INFO L483 AbstractCegarLoop]: Interpolant automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 18 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-06-05 15:16:51,623 INFO L276 IsEmpty]: Start isEmpty. Operand 5205 states and 22301 transitions. [2021-06-05 15:16:51,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2021-06-05 15:16:51,630 INFO L513 BasicCegarLoop]: Found error trace [2021-06-05 15:16:51,630 INFO L521 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-06-05 15:16:51,831 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 699 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1521 [2021-06-05 15:16:51,831 INFO L430 AbstractCegarLoop]: === Iteration 700 === [ULTIMATE.startErr3INUSE_VIOLATION, ULTIMATE.startErr2INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONASSERT]=== [2021-06-05 15:16:51,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-06-05 15:16:51,831 INFO L82 PathProgramCache]: Analyzing trace with hash 1444496705, now seen corresponding path program 21 times [2021-06-05 15:16:51,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-06-05 15:16:51,831 INFO L361 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859384550] [2021-06-05 15:16:51,831 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-06-05 15:16:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-06-05 15:16:51,937 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:51,937 INFO L179 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-06-05 15:16:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859384550] [2021-06-05 15:16:51,937 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [859384550] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:51,937 INFO L361 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [605445017] [2021-06-05 15:16:51,937 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 700 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-06-05 15:16:51,962 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-06-05 15:16:51,962 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-06-05 15:16:51,962 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 31 conjunts are in the unsatisfiable core [2021-06-05 15:16:51,963 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-06-05 15:16:52,076 INFO L190 IndexEqualityManager]: detected not equals via solver [2021-06-05 15:16:52,097 INFO L354 Elim1Store]: treesize reduction 10, result has 80.4 percent of original size [2021-06-05 15:16:52,097 INFO L388 Elim1Store]: Elim1 did not use preprocessing eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 1 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 5 case distinctions, treesize of input 31 treesize of output 59 [2021-06-05 15:16:52,101 INFO L550 ElimStorePlain]: Start of recursive call 2: End of recursive call: and 2 xjuncts. [2021-06-05 15:16:52,116 INFO L628 ElimStorePlain]: treesize reduction 47, result has 23.0 percent of original size [2021-06-05 15:16:52,116 INFO L550 ElimStorePlain]: Start of recursive call 1: 1 dim-1 vars, End of recursive call: and 1 xjuncts. [2021-06-05 15:16:52,116 INFO L247 ElimStorePlain]: Needed 2 recursive calls to eliminate 1 variables, input treesize:34, output treesize:14 [2021-06-05 15:16:52,154 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-06-05 15:16:52,155 INFO L200 FreeRefinementEngine]: IpTcStrategyModuleZ3 [605445017] provided 0 perfect and 1 imperfect interpolant sequences [2021-06-05 15:16:52,155 INFO L226 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-06-05 15:16:52,155 INFO L239 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2021-06-05 15:16:52,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1370750499] [2021-06-05 15:16:52,155 INFO L462 AbstractCegarLoop]: Interpolant automaton has 20 states [2021-06-05 15:16:52,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-06-05 15:16:52,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-06-05 15:16:52,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=330, Unknown=0, NotChecked=0, Total=380 [2021-06-05 15:16:52,155 INFO L87 Difference]: Start difference. First operand 5205 states and 22301 transitions. Second operand has 20 states, 20 states have (on average 2.25) internal successors, (45), 19 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Received shutdown request... [2021-06-05 15:16:52,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-06-05 15:16:52,369 WARN L519 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 700 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable1523 [2021-06-05 15:16:52,369 WARN L547 AbstractCegarLoop]: Verification canceled [2021-06-05 15:16:52,370 INFO L246 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-06-05 15:16:52,372 WARN L196 ceAbstractionStarter]: Timeout [2021-06-05 15:16:52,372 INFO L202 PluginConnector]: Adding new model parallel-sum-1.wvr.bpl de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.06 03:16:52 BasicIcfg [2021-06-05 15:16:52,372 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-06-05 15:16:52,372 INFO L168 Benchmark]: Toolchain (without parser) took 855894.42 ms. Allocated memory was 333.4 MB in the beginning and 1.3 GB in the end (delta: 935.3 MB). Free memory was 312.7 MB in the beginning and 980.5 MB in the end (delta: -667.8 MB). Peak memory consumption was 268.7 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:52,373 INFO L168 Benchmark]: Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 333.4 MB. Free memory was 313.9 MB in the beginning and 313.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:16:52,373 INFO L168 Benchmark]: Boogie Procedure Inliner took 19.60 ms. Allocated memory is still 333.4 MB. Free memory was 312.6 MB in the beginning and 311.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. [2021-06-05 15:16:52,373 INFO L168 Benchmark]: Boogie Preprocessor took 20.22 ms. Allocated memory is still 333.4 MB. Free memory was 311.1 MB in the beginning and 310.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:52,373 INFO L168 Benchmark]: RCFGBuilder took 240.66 ms. Allocated memory is still 333.4 MB. Free memory was 310.0 MB in the beginning and 294.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:52,373 INFO L168 Benchmark]: TraceAbstraction took 855594.82 ms. Allocated memory was 333.4 MB in the beginning and 1.3 GB in the end (delta: 935.3 MB). Free memory was 294.4 MB in the beginning and 980.5 MB in the end (delta: -686.1 MB). Peak memory consumption was 251.9 MB. Max. memory is 16.0 GB. [2021-06-05 15:16:52,373 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * Boogie PL CUP Parser took 0.10 ms. Allocated memory is still 333.4 MB. Free memory was 313.9 MB in the beginning and 313.8 MB in the end (delta: 70.3 kB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 19.60 ms. Allocated memory is still 333.4 MB. Free memory was 312.6 MB in the beginning and 311.1 MB in the end (delta: 1.5 MB). There was no memory consumed. Max. memory is 16.0 GB. * Boogie Preprocessor took 20.22 ms. Allocated memory is still 333.4 MB. Free memory was 311.1 MB in the beginning and 310.1 MB in the end (delta: 1.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 240.66 ms. Allocated memory is still 333.4 MB. Free memory was 310.0 MB in the beginning and 294.8 MB in the end (delta: 15.2 MB). Peak memory consumption was 14.7 MB. Max. memory is 16.0 GB. * TraceAbstraction took 855594.82 ms. Allocated memory was 333.4 MB in the beginning and 1.3 GB in the end (delta: 935.3 MB). Free memory was 294.4 MB in the beginning and 980.5 MB in the end (delta: -686.1 MB). Peak memory consumption was 251.9 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - TimeoutResultAtElement [Line: 77]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5205states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5205states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - TimeoutResultAtElement [Line: 76]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5205states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - TimeoutResultAtElement [Line: 78]: Timeout (TraceAbstraction) Unable to prove that petrification did provide enough thread instances (tool internal message, not intended for end users) Cancelled while BasicCegarLoop was constructing difference of abstraction (5205states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - TimeoutResultAtElement [Line: 85]: Timeout (TraceAbstraction) Unable to prove that assertion always holds Cancelled while BasicCegarLoop was constructing difference of abstraction (5205states) and FLOYD_HOARE automaton (currently 3 states, 20 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 20 known predicates. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 9 procedures, 42 locations, 5 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 855497.2ms, OverallIterations: 700, TraceHistogramMax: 3, EmptinessCheckTime: 3737.5ms, AutomataDifference: 465745.9ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 39.0ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 44244 SDtfs, 127227 SDslu, 434866 SDs, 0 SdLazy, 479017 SolverSat, 39951 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 163104.7ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 30442 GetRequests, 9812 SyntacticMatches, 555 SemanticMatches, 20074 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126763 ImplicationChecksByTransitivity, 377665.8ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=5216occurred in iteration=698, InterpolantAutomatonStates: 17475, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 36715.1ms AutomataMinimizationTime, 699 MinimizatonAttempts, 313859 StatesRemovedByMinimization, 699 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2228.4ms SsaConstructionTime, 5951.0ms SatisfiabilityAnalysisTime, 187878.6ms InterpolantComputationTime, 31941 NumberOfCodeBlocks, 31941 NumberOfCodeBlocksAsserted, 2294 NumberOfCheckSat, 30542 ConstructedInterpolants, 33 QuantifiedInterpolants, 580684 SizeOfPredicates, 4734 NumberOfNonLiveVariables, 61113 ConjunctsInSsa, 21482 ConjunctsInUnsatCore, 1399 InterpolantComputations, 4 PerfectInterpolantSequences, 42/8366 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown